CN114903262B - Support plate unfolding and folding device - Google Patents

Abstract

The supporting plate unfolding and folding device comprises a supporting unit, a linkage unit and a pulling unit, wherein the linkage unit and the pulling unit are connected to the supporting unit, the supporting unit comprises a main supporting piece, at least one side supporting piece and a guide part, the main supporting piece is provided with a main supporting surface, the side supporting piece is provided with a pulled surface, the pulling unit can move and is connected to the guide part and comprises at least one pulling part, the pulling unit is linked by the linkage unit, the pulling part and the pulled surface can be obliquely pulled, and the side supporting piece is converted between a folding state in which the side supporting piece is arranged at an angle relative to the main supporting piece and a unfolding state in which the side supporting piece is arranged in parallel relative to the main supporting piece. With the integral assembly, the support unit can be easily unfolded and folded in a simple operation manner.

Description

Support plate unfolding and folding device

Technical Field

The invention relates to automatic unfolding and folding equipment, in particular to a supporting plate unfolding and folding device.

Background

The aged or people with inconvenient actions can walk continuously and uninterruptedly because of the decline and deficiency of physiological functions, so that the walking process needs to be stopped for proper rest and the people can walk again after the physical strength is recovered. Accordingly, there are related operators who develop related appliances that can be operated in a riding or auxiliary supporting state according to the needs of users.

For example, the taiwan certificate TWM467398 patent document "crutch chair" includes a quadrilateral positioning seat, a plurality of supporting legs and a riding cloth body, the positioning seat is provided with long slot holes with two beveled ends, one supporting leg is provided with a supporting block, the supporting legs are respectively pivoted in each long slot hole, and the riding cloth body is fixedly connected and laid on the top ends of the supporting legs and the upper ends of the supporting blocks.

When the seat is used, the supporting feet are required to be unfolded by taking the pivot positions of the supporting feet and the long slotted holes of the positioning seat as the axes, and the supporting feet are enabled to obliquely lean against the long slotted holes of the positioning seat, at the moment, the bottom ends of the supporting feet can be supported on the ground, and the top ends of the supporting feet and the supporting blocks are used for supporting the riding cloth body so as to enable a user to ride on the riding cloth body.

Although the crutch chair can be unfolded and used or folded at proper time, when being unfolded or folded, an operator must pull each supporting leg one by one to generate pivoting relative to the positioning seat, the operation is troublesome, and the operation speed is slow, that is, each supporting leg is not interlocked, and the supporting legs are required to be unfolded or folded respectively.

Especially for the elderly or people with inconvenient actions, the stability and balance of the device are poor, and the device bends down to pull each supporting leg one by one, thereby increasing the inconvenience of operation.

Disclosure of Invention

The invention aims to provide a supporting plate unfolding and folding device which is simple in structure and can be unfolded and folded easily.

The support plate unfolding and folding device can be positioned relative to a positioning piece and comprises a support unit, a linkage unit and a pulling unit, wherein the linkage unit is connected with the support unit, the support unit comprises a main support piece connected with the positioning piece, at least one side support piece pivoted with the main support piece, and a guide part arranged at one of the main support piece and the side support piece, the main support piece is provided with a main support surface, the side support piece is provided with an inner side edge adjacent to the main support piece, an outer side edge opposite to the inner side edge, a side support surface extending from the inner side edge to the outer side edge, a side bottom surface opposite to the side support surface, and a pulled block corresponding to the guide part, the pulled block is provided with a pulled surface intersecting with the side bottom surface, the pulled surface is provided with an outer side end, and an inner side end opposite to the outer side end, the pulled surface is gradually deflected towards the inner side edge when extending towards the inner side end, the linkage unit is connected with the main support piece, and the linkage unit is in a state of being connected with the main support surface and can be unfolded relative to the support surface, and the linkage unit is arranged between the support unit and the support unit in a state of being enabled to be unfolded relative to the main support surface.

According to the support plate expanding and contracting device, a first interval is generated between the outer side end of the braked surface of the support unit and the inner side edge, and a second interval smaller than the first interval is generated between the inner side end and the inner side edge.

According to the supporting plate unfolding and folding device, the braked surface of the supporting unit is smooth and has no turning.

The main support piece of the support unit is further provided with a first end, a second end opposite to the first end along the first axial direction, a pair of long side edges connected between the first end and the second end, and a main bottom surface opposite to the main support surface, the guide part is in a guide rail shape and is arranged between the long side edges, the guide part extends correspondingly to the first axial direction, the inner side edge of the side support piece is opposite to one of the long side edges, the side bottom surface is arranged on the braked block, and the brake unit further comprises a pivot guide part which is arranged on one side of the brake part and can move and penetrate through the guide part.

According to the support plate unfolding and folding device, the braked blocks of the side support pieces of the support units are adjacent to the first ends of the main support pieces, the braked blocks are inclined, and when the second ends extend towards the first ends, the outer side edges extend towards the inner side edges in a inclined mode.

According to the support plate unfolding and folding device, the guide part of the support unit is arranged between the main support surface and the main bottom surface and parallel to the main support surface, the guide part corresponds to the first end, the linkage unit approaches to the first end and is pivoted to the main support piece, the pivoting guide piece of the braking unit is in a rod shape, the braking unit further comprises at least one braking plate connected to the pivoting guide piece, and a pivot plate connected to the braking plate and pivoted to the linkage unit, and the braking part and the pivot plate are respectively arranged at two ends of the braking plate.

According to the support plate unfolding and folding device, the guide part of the support unit is in a chute shape, and gradually inclines and extends from the main support surface to the main bottom surface when the second end extends to the first end, the guide part corresponds to the first end, the linkage unit approaches to the first end and is pivoted to the main support piece, the pivoting guide piece of the braking unit is in a rod shape, and the braking unit further comprises a pivoting plate connected to the pivoting guide piece and pivoted to the linkage unit, and the braking part is arranged at the tail end of the pivoting guide piece.

In the support plate unfolding and folding device, the guide part of the support unit is arranged between the main support surface and the main bottom surface and parallel to the main support surface, the guide part corresponds to the first end, the linkage unit approaches to the first end and is pivoted to the main support piece, the pivoting guide piece of the braking unit is in a rod shape, and the braking unit further comprises at least one braking plate connected to the pivoting guide piece and a connecting rod pivoted between the braking plate and the linkage unit.

In the support plate expanding and contracting device, the braked block of the side support piece approaches to the second end of the main support piece, and the braked surface of the braked block gradually deflects from the inner side edge to the outer side edge when the braked surface extends from the second end to the first end.

In the support plate unfolding and folding device, the guide part of the support unit is arranged between the main support surface and the main bottom surface, the guide part extends from the second end towards the first end, the braking unit is also provided with a braking plate connected with the pivot guide piece, and the braking plate is provided with a braking part corresponding to the braked surface.

The main support piece of the support unit is also provided with a guide rail, the two side support pieces are respectively pivoted on two sides of the main support piece, the linkage unit comprises a carrying seat pivoted on the positioning piece, two support rods pivoted on the carrying seat, a linkage piece which approaches to the first end and pivoted on the main support piece, a sliding sleeve connected with the linkage piece and sleeved on the positioning piece, a first connecting rod pivoted on the linkage piece, a second connecting rod pivoted on the carrying seat and pivoted with the first connecting rod, and a guide block pivoted on the second connecting rod, wherein the guide block can be movably connected with the guide rail along the guide rail, and the support rods are propped against the bottom of the side support piece when the side support surface is in a unfolding state relative to the main support surface.

According to the support plate unfolding and folding device, the linkage piece of the linkage unit is provided with at least one shaft pivot hole, the shaft pivot hole is provided with a round hole part and a groove part concaved outwards from the round hole part, the braking unit also comprises at least one shaft rotating part pivoted to the shaft pivot hole, the shaft rotating part is provided with a cylindrical part and a protruding part convexly arranged outwards from the cylindrical part, when the cylindrical part of the shaft rotating part is sleeved in the round hole part, the protruding part can also pass through the groove part, and after the shaft rotating part rotates relative to the shaft pivot hole, the protruding part is staggered relative to the groove part.

According to the support plate unfolding and folding device, the braked block of the support unit is further provided with the limiting surface which is connected to the inner side end and is intersected with the braked surface, the limiting surface is substantially parallel to the first axial direction, and when the braked part of the braked unit is propped against the limiting surface, the side support surface is kept in an unfolding state relative to the main support surface.

According to the support plate unfolding and folding device, the guide part of the support unit is in the shape of the convex rib and is arranged on the braked block, and the guide part is substantially parallel to the side support surface and is intersected with the braked surface and the limiting surface.

The invention has the beneficial effects that: by means of the integral combination of the supporting unit, the linkage unit and the braking unit, the supporting unit can be easily unfolded and folded in a simple operation mode only by pulling the main supporting piece or the side supporting piece.

Drawings

FIG. 1 is a perspective view of a first embodiment of a support panel retracting device of the present invention;

fig. 2 is an exploded perspective view of the first embodiment;

FIG. 3 is an exploded perspective view of the first embodiment of the linkage and detent unit;

fig. 4 is a partially enlarged perspective view of the side support of the first embodiment;

FIG. 5 is an enlarged schematic view of a partial plane of the side support of the first embodiment;

FIG. 6 is a fragmentary cross-sectional schematic view of FIG. 1 illustrating the support unit in a collapsed state;

FIG. 7 is a partial perspective enlarged schematic view of the other view of FIG. 1;

fig. 8 is a schematic perspective operation of the first embodiment;

FIG. 9 is a partial perspective enlarged schematic view of the other view of FIG. 8;

FIG. 10 is a fragmentary cross-sectional schematic view of FIG. 8 illustrating a state of the support unit during operation;

fig. 11 is a perspective view of the first embodiment, illustrating the support unit in an unfolded state;

FIG. 12 is a schematic cross-sectional view of FIG. 11;

FIG. 13 is an enlarged partial schematic view of FIG. 12;

FIG. 14 is a partial perspective enlarged schematic view of the other view of FIG. 11;

Fig. 15 is a schematic view of the deployment operation of the first embodiment;

FIG. 16 is an exploded perspective view of a second embodiment of the support panel retracting device of the present invention;

FIG. 17 is a fragmentary sectional view of the second embodiment illustrating the support unit in a collapsed state;

fig. 18 is a partially enlarged perspective view showing the operation of the second embodiment, illustrating the state of the supporting unit during the operation;

Fig. 19 is an enlarged plan view of the second embodiment, illustrating the support unit in an unfolded state;

FIG. 20 is a partial schematic perspective view of FIG. 19;

FIG. 21 is a partial perspective view of a third embodiment of the support panel retracting device of the present invention, illustrating the support unit in an extended state;

fig. 22 is an exploded perspective view of a fourth embodiment of the support panel retracting device of the present invention;

fig. 23 is a partial perspective view of the fourth embodiment, illustrating the support unit in an unfolded state;

FIG. 24 is a fragmentary, exploded perspective view of a fifth embodiment of the support panel retracting device of the present invention;

Fig. 25 is a partial perspective view of the fifth embodiment, illustrating the support unit in an unfolded state.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

Referring to fig. 1 to 7, a first embodiment of the support plate folding and unfolding device of the present invention is described by taking a crutch chair as an example, and certainly not limited to being applied to a crutch chair, the support plate folding and unfolding device can be positioned relative to a positioning piece 1 and comprises a linkage unit 10, a support unit 20 and a braking unit 30.

The linkage unit 10 comprises a sliding sleeve 11 capable of sliding and sleeved on the positioning piece 1, a linkage piece 12 connected to the sliding sleeve 11, a carrying seat 13 arranged at intervals with the sliding sleeve 11 and pivoted on the positioning piece 1, two supporting rods 14 pivoted on the carrying seat 13, a first connecting rod 15 pivoted on the linkage piece 12, a second connecting rod 16 pivoted on the carrying seat 13 and pivoted with the first connecting rod 15, and a guide block 17 pivoted on the second connecting rod 16. The sliding sleeve 11 is hollow and tubular, and has a pivot 111, the linkage member 12 has a pair of pivot holes 121, and a pair of mounting holes 122 respectively disposed on one side of the corresponding pivot holes 121, the pivot holes 121 each have a circular hole portion 123, and a groove portion 124 recessed outward from the circular hole portion 123, and the guide block 17 has a T-shaped chuck 171. The supporting rod 14 and the positioning member 1 are respectively provided with a pushing block 18, and each pushing block 18 is provided with two pushing surfaces 181 which are intersected into a V shape. The second link 16 is pivotally connected between the carrier 13 and the guide block 17.

The supporting unit 20 comprises a main supporting member 21 rotatably connected to the linkage unit 10 relative to the positioning member 1, two side supporting members 22 pivotally connected to both sides of the main supporting member 21, and a guiding portion 23 disposed on the main supporting member 21.

The main support 21 has a first end 211, a second end 212 opposite to the first end 211 along a first axial direction X, a pair of long side edges 213 connected between the first end 211 and the second end 212, a main support surface 214 extending from the first end 211 to the second end 212, a main bottom surface 215 opposite to the main support surface 214, a pair of pivot plates 216 disposed at the first end 211 and pivotally connected to the mounting holes 122, a plurality of first pivot tubes 217 respectively disposed at the long side edges 213, and a guide rail 218 extending along the first axial direction X. The chuck 171 of the guide block 17 is movable along the guide rail 218 and is coupled to the guide rail 218. The linking unit 10 approaches the first end 211 and is pivotally connected to the main support 21. The main support 21 further comprises a main body 26, and a rail seat 27 screwed to the bottom of the main body 26, wherein the main bottom surface 215 is disposed on the rail seat 27, and the guide rail 218 is recessed from the main bottom surface 215 and has a shape of being wide inside and narrow outside (the cross section of the guide rail 218 perpendicular to the first axial direction X is in an inverted T shape), so as to movably connect the chuck 171.

Each side support 22 has an inner side edge 221 adjacent to one of the long side edges 213 of the main support 21, an outer side edge 222 opposite to the inner side edge 221, a side support surface 223 extending from the inner side edge 221 to the outer side edge 222, a side bottom surface 224 opposite to the side support surface 223, a catch block 24 adjacent to the inner side edge 221 and corresponding to the guide portion 23, and a plurality of second pivot pipes 226 respectively disposed at the inner side edge 221 and pivoted to the first pivot pipe 217, the catch block 24 having a catch surface 241 intersecting the side bottom surface 224, a stop surface 242 intersecting the catch surface 241, and a guide surface 243 intersecting the catch surface 241, the stop surface 242, the guide surface 243 being substantially parallel to the first axial direction X, the catch block 24 being adjacent to the first end 211 of the main support 21, the catch surface being beveled and having an outer side end 244, and a curved end 241 extending gradually from the opposite side edge 244 toward the inner side edge 221 toward the outer side edge 2 toward the outer side edge 245 (as the end of the inner side edge 221 is drawn toward the outer side edge 221 from the outer side edge 2 h) as the end of the inner side edge 241 is drawn toward the outer side edge 245, the outer side edge 245 is gradually extending from the outer side edge 2 toward the outer side edge 245, as the outer side edge 245 is drawn toward the outer side edge 2. The side bottom 224 is disposed on the pulled block 24.

The guiding portion 23 is shaped like a guide rail and is disposed between the long side edges 213 and extends corresponding to the first axial direction X, the guiding portion 23 is disposed between the main supporting surface 214 and the main bottom surface 215 and parallel to the main supporting surface 214, and the guiding portion 23 corresponds to the first end 211. The guide portion 23 is concavely provided on the rail seat 27.

The braking unit 30 extends along a second axis Y perpendicular to the first axis X, is movably connected to the guiding portion 23 corresponding to the braked block 24, and includes a pivot guiding member 31 movably penetrating the guiding portion 23, a pair of braking plates 32 respectively connected to two sides of the pivot guiding member 31 along the second axis Y, a pair of pivot plates 33 respectively connected to the braking plates 32 and pivotally connected to the linkage unit 10, and a pair of shaft rotating portions 34 respectively arranged at the pivot plates 33 and pivotally connected to the shaft pivot holes 121. The pivot guide 31 is rod-shaped. Each of the detent plates 32 has a detent portion 321 disposed at a side edge, each of the shaft rotating portions 34 has a cylindrical portion 341, and a protruding portion 342 protruding outward from the cylindrical portion 341, and when the cylindrical portion 341 is sleeved in the corresponding circular hole portion 123, the protruding portion 342 can also pass through the corresponding groove portion 124, and after the shaft rotating portion 34 pivots relative to the shaft pivot hole 121, the protruding portion 342 is staggered relative to the groove portion 124.

For a further understanding of the nature of the invention, the manner in which the elements of the invention operate and are operated, and the effects expected to be achieved, it is believed that the invention will be better understood and embodied in view of the following description.

As shown in fig. 1, 6, 7 and 15, when the support board folding and unfolding apparatus of the present invention is assembled as a whole, and the support unit 20 is in a folded state, the positioning element 1 and the support bar 14 are close to each other and are substantially parallel, and the pushing surfaces 181 of two pushing blocks 18 disposed adjacently approach each other and face each other. At this time, the second end 212 of the main support 21 is in a close state approaching to the carrier 13, the main support 21 and the side support 22 are inverted U-shaped around the carrier 13, and the side support surface 223 is disposed at an angle with respect to the main support surface 214. At this time, the guide block 17 approaches the first end 211, and the detent plate 32 is respectively located between the detent block 24 and the main supporting surface 214.

As shown in fig. 8 to 10 and 15, when the operator pulls the second end 212 of the main support 21 upwards and makes the second end 212 gradually far away from the carrier 13, the main support 21 pivots relative to the linkage 12 of the linkage unit 10, and the linkage 12 pivots relative to the brake unit 30, and the pivot guide 31 slidably passes through the guide portion 23, the brake unit 30 translates along the guide portion 23 and rotates, and the brake portion 321 of the brake plate 32 is lifted up from the main support surface 214 toward the main bottom surface 215, so that the brake portion 321 of the brake plate 32 is inclined to the brake receiving surface 241, and the brake block 24 is driven to rotate relative to the main support 21 by the action of the linkage 12 and the pivot guide 31, until the brake portions 321 respectively support the limit surfaces 242, and the brake block 24 is disposed on both sides of the main support surface 214 along the second axial direction, and the brake block 24 is kept in a state of being parallel to the support surface 20, and the brake plate 32 is kept in a state of being parallel to the support surface 214.

With reference to fig. 15, in the principle of the above-mentioned oblique braking action, the two top diagrams in fig. 15 show that the sliding sleeve 11 is disposed substantially parallel to the main supporting member 21, the braking plate 32 is also disposed substantially parallel to the main supporting member 21, and the braking plate 32 is located between the guiding surface 243 of the braked block 24 and the main supporting member 21. As shown in fig. 8, when the operator continues to pull the second end 212 of the main support member 21 upward, the middle icon in fig. 15 shows that the pulling plate 32 is in contact with the outer end 244 of the pulled surface 241, and the main support member 21 pivots relative to the linking member 12 of the linking unit 10 while the pulling plate 32 moves from the second end 212 toward the first end 211, the linking member 12 links the pulling unit 30 again, such that the pulling plate 32 rotates relative to the main bottom surface 215 during the translation along the guiding portion 23, and the pulling portion 321 of the pulling plate 32 is lifted from the main supporting surface 214 toward the main bottom surface 215, resulting in a pulling action of the pulling plate 32 on the pulled block 24, and then, referring to fig. 5, by using the first distance h1 generated between the outer end 244 of the pulled surface 241 and the inner edge 221, the distance h2 generated between the inner end 245 and the inner edge 221 is greater than the action of the second distance h2 generated between the pulled surface 245 and the inner edge 221, and the pulled surface 241 is tapered, such that the pulled surface 241 pivots relative to the pulled surface 22 to the pulled surface 32. That is, since each of the catch surfaces 241 is inclined from the outer end 244 toward the inner end 245, the distance from the inner edge 221 becomes smaller, and the interference generated between the catch plate 32 and the catch surface 241 will shift the catch block 24 (the side supporting member 22) when the catch plate 32 moves from the second end 212 toward the first end 211, and the catch plate 32 will continuously shift the catch block 24 as the catch surface 241 is inclined.

In addition, after the side support 22 is pivoted and unfolded relative to the main support 21, the two sides of the braking plate 32 are propped against the limiting surfaces 242 of the side support 22, so that the side supports 22 can be kept in the unfolded state of being arranged in parallel relative to the main support 21, and the side supports 22 cannot be optionally pivoted relative to the main support 21 (see the lowest drawing in fig. 15).

And as shown in fig. 6, 10 and 13, when the main support 21 pivots relative to the linking member 12 of the linking unit 10, the guide block 17 slides along the guide rail 218 from the first end 211 toward the second end 212, the guide block 17 drives the first link 15 and the second link 16, and also drives the positioning member 1 to pivot relative to the carrier 13, and when the positioning member 1 pivots, the pushing block 18 mounted on the main support 21 can push the pushing surface 181 of the adjacent support rod 14, and drive the adjacent support rod 14 to pivot relative to the carrier 13, so that the top ends of the positioning member 1 and the support rod 14 are separated from each other, the bottom ends of the support rods 14 are separated from each other, and the top ends of the support rods 14 are supported and positioned at the bottom of the side support member 22, so that the side support member 22 can generate a stable supporting effect when the side support member 22 is unfolded relative to the main support 21.

Conversely, when the operator pulls the sliding sleeve 11 to slide upwards along the positioning element 1 and makes the second end 212 gradually approach the carrier 13, the state of fig. 14 gradually changes from the state of fig. 8 to the state of fig. 1, and the supporting unit 20 returns to the retracted state (the positioning element 1 and the supporting rod 14 are mutually close and substantially parallel, the pushing surfaces 181 of two adjacent pushing blocks 18 approach each other and are opposite to each other), and the second end 212 of the main supporting element 21 is in the close state approaching the carrier 13.

That is, when the support plate folding and unfolding device of the present invention is integrally assembled, the pulling unit 30 is linked by the linking unit 10, so that the pulling portion 321 and the pulled surface 241 are obliquely pulled, and the side support surface 223 is switched between a folded state where the side support surface 223 is disposed at an angle relative to the main support surface 214 and a folded state where the side support surface 223 is disposed in parallel relative to the main support surface 214.

Therefore, the support unit 20 of the present invention is easy to be converted between the unfolded state and the folded state, and only the second end 212 of the main support 21 is pulled upwards or the sliding sleeve 11 is pulled, so that the support unit can be operated smoothly without bending down the waist for the elderly or the people with inconvenient actions. The above-mentioned conversion between the unfolded state and folded state mainly utilizes the mutual linkage of every component to make the supporting unit 20 convert between the folded state and unfolded state, so that the supporting plate unfolding and folding device can attain the goal of easy unfolding and folding operation.

Referring to fig. 3, in the first embodiment, when the cylindrical portion 341 is sleeved in the corresponding circular hole portion 123, the protruding portion 342 can also pass through the corresponding groove portion 124, and after the shaft rotating portion 34 pivots relative to the shaft pivot hole 121, the protruding portion 342 is offset relative to the groove portion 124, so that the shaft rotating portion 34 and the shaft pivot hole 121 can be conveniently installed, and even in operation, the shaft rotating portion 34 cannot be easily separated from the shaft pivot hole 121.

Referring to fig. 16 to 20, the second embodiment of the support plate folding and unfolding apparatus of the present invention, similar to the first embodiment, also includes a linkage unit 10', a support unit 20' and a braking unit 30'. The difference from the first embodiment is that the guiding portion 23 'of the supporting unit 20' is in a chute shape, and gradually extends from the main supporting surface 214 'toward the main bottom surface 215' when extending from the second end 212 'toward the first end 211', the braking unit 30 'includes a pivoting guide 31' movably penetrating the guiding portion 23', and a pair of pivoting plates 33' respectively connected to the pivoting guide 31 'and directly pivoted to the linking unit 10' by rivets. The pivot guide 31' has a rod shape, and two ends of the pivot guide 31' are respectively provided with a braking portion 321'.

By means of the cooperation of the chute-shaped guiding portion 23 'and the pivoting guide 31', when an operator pulls the second end 212 'of the main support 21' upwards or pulls the sliding sleeve 11, and pivots the main support 21 'relative to the linking member 12' of the linking unit 10', the braking portion 321' and the braking surface 241 'can be obliquely braked, so that the support unit 20' can be switched between the folded state and the unfolded state. The operation of the oblique pulling between the pulling portion 321' and the pulling surface 241' of the pulling block 24' is similar to that of the first embodiment, so will not be described again.

Therefore, the second embodiment of the support plate folding and unfolding device can achieve the same purpose and effect as the first embodiment.

Referring to fig. 21, the third embodiment of the support plate folding and unfolding apparatus of the present invention, similar to the first embodiment, also includes a linkage unit 10, a support unit 20 and a detent unit 30". The difference from the first embodiment is that the detent unit 30 "includes a rod-shaped pivot guide 31", two detent plates 32 "connected to the pivot guide 31", and a link 33 "pivotally connected between one of the detent plates 32" and the linking unit 10. The third embodiment of the support plate folding and unfolding device can achieve the same purpose and effect as the first embodiment and the second embodiment.

Referring to fig. 22 to 23, a fourth embodiment of the support plate folding and unfolding apparatus of the present invention also includes a linkage unit 10, a support unit 200 and a braking unit 300. The catch block 240 of the side support 220 approaches the second end 212 of the main support 210, the catch surface 241 gradually deviates from the outer side edge 222 toward the inner side edge 221 when extending from the outer side end 244 toward the inner side end 245, and the catch surface 241 of the catch block 240 gradually deviates from the inner side edge 221 toward the outer side edge 222 when extending from the second end 212 toward the first end 211. The guide portion 230 of the supporting unit 200 is interposed between the main supporting surface 214 and the main bottom surface 215, the guide portion 230 of the present embodiment is the guide rail 218 of the first embodiment, the guide portion 230 extends from the second end 212 toward the first end 211, the pivot guide 310 of the present embodiment is the guide block 17 of the first embodiment, the pivot guide 310 is block-shaped and can move along the guide portion 230 (guide rail), and the second link 16 is pivotally connected between the carrier 13 and the pivot guide 310. And the detent plate 320 of the detent unit 300 is integrally connected to the pivot guide 310, and each detent plate 320 has a detent portion 321 corresponding to the detent surface 241.

The fourth embodiment of the present invention operates in the same manner as the above-described embodiments and achieves the same objects and effects as the above-described embodiments.

Referring to fig. 24 and 25, a fifth embodiment of the support plate folding and unfolding apparatus of the present invention also includes a linkage unit 10, a support unit 200 'and a braking unit 300'. The guide portions 230' of the supporting unit 200' are in a rib shape, two in number are respectively disposed on the pulled blocks 240', and the guide portions 230' are substantially parallel to the side supporting surface 223 and intersect the pulled surface 241' and the limiting surface 242 to form an L shape. When the support unit 200' performs the switching operation between the unfolded state and the folded state, the end portion of the detent plate 320' of the detent unit 300' is guided by the guiding portion 230', and can be movably connected to the guiding portion 230 '.

In summary, the support plate folding and unfolding device of the present invention can easily fold and unfold the support unit by using a simple structure and a simple operation manner, and can achieve the purpose of the present invention.

Claims (14)

1. The utility model provides a backup pad exhibition receipts device, can be fixed a position for the setting element to include supporting element, connect in supporting element's interlock unit and brake unit, its characterized in that:

the supporting unit comprises a main supporting piece connected with the positioning piece, at least one side supporting piece pivoted with the main supporting piece, and a guide part arranged on one of the main supporting piece and the side supporting piece, wherein the main supporting piece is provided with a main supporting surface, the side supporting piece is provided with an inner side edge adjacent to the main supporting piece, an outer side edge opposite to the inner side edge, a side supporting surface extending from the inner side edge to the outer side edge, a side bottom surface opposite to the side supporting surface, and a catch block corresponding to the guide part, the catch block is provided with a catch surface intersecting with the side bottom surface, and the catch surface is provided with an outer side end and an inner side end opposite to the outer side end and gradually deviates towards the inner side edge when extending from the outer side end to the inner side end;

The linkage unit is connected to the main support piece;

The braking unit is corresponding to the braked block, can move and is connected with the guide part and comprises at least one braking part, the braking unit is linked by the linking unit, the braking part and the braked surface can be obliquely braked, and the side supporting surface is converted between a folding state in which the side supporting surface is arranged at an angle relative to the main supporting surface and a unfolding state in which the side supporting surface is arranged in parallel relative to the main supporting surface.

2. The support panel retracting device according to claim 1, wherein: a first interval is generated between the outer side end of the braked surface of the supporting unit and the inner side edge, and a second interval smaller than the first interval is generated between the inner side end and the inner side edge.

3. The support panel retracting device according to claim 2, wherein: the pulled surface of the supporting unit is smooth and has no turning shape.

4. The support panel retracting device according to claim 2, wherein: the main support piece of the support unit is further provided with a first end, a second end opposite to the first end along the first axial direction, a pair of long side edges connected between the first end and the second end, and a main bottom surface opposite to the main support surface, the guide part is in a guide rail shape and is arranged between the long side edges and extends correspondingly to the first axial direction, the inner side edge of the side support piece is opposite to one of the long side edges, the side bottom surface is arranged on the braked block, and the brake unit further comprises a pivot guide piece which is arranged on one side of the brake part, can move and penetrates through the guide part.

5. The support panel retracting device according to claim 4, wherein: the block of the side support of the support unit is adjacent to the first end of the main support, the block of the side support is inclined, and the block of the side support gradually extends from the outer side edge to the inner side edge in a deflection manner when the second end extends to the first end.

6. The support panel retracting device according to claim 5, wherein: the guide part of the supporting unit is arranged between the main supporting surface and the main bottom surface and is parallel to the main supporting surface, the guide part corresponds to the first end, the linkage unit approaches to the first end and is pivoted to the main supporting piece, the pivoting guide piece of the braking unit is in a rod shape, the braking unit further comprises at least one braking plate connected to the pivoting guide piece, and a pivoting plate connected to the braking plate and pivoted to the linkage unit, and the braking part and the pivoting plate are respectively arranged at two ends of the braking plate.

7. The support panel retracting device according to claim 4, wherein: the guide part of the supporting unit is in a chute shape, and gradually inclines and extends from the main supporting surface to the main bottom surface when the second end extends towards the first end, the guide part corresponds to the first end, the linkage unit approaches to the first end and is pivoted to the main supporting piece, the pivoting guide piece of the braking unit is in a rod shape, the braking unit further comprises a pivoting plate connected to the pivoting guide piece and pivoted to the linkage unit, and the braking part is arranged at the tail end of the pivoting guide piece.

8. The support panel retracting device according to claim 4, wherein: the guide part of the supporting unit is arranged between the main supporting surface and the main bottom surface and is parallel to the main supporting surface, the guide part corresponds to the first end, the linkage unit approaches to the first end and is pivoted to the main supporting piece, the pivoting guide piece of the braking unit is in a rod shape, and the braking unit further comprises at least one braking plate connected to the pivoting guide piece and a connecting rod pivoted between the braking plate and the linkage unit.

9. The support panel retracting device according to claim 4, wherein: the block of the side support piece approaches to the second end of the main support piece, and the block surface of the block gradually deflects from the inner side edge to the outer side edge when the block surface extends from the second end to the first end.

10. The support panel retracting device according to claim 9, wherein: the guide part of the supporting unit is arranged between the main supporting surface and the main bottom surface, the guide part extends from the second end towards the first end, the braking unit is also provided with a braking plate connected with the pivot guide piece, and the braking plate is provided with a braking part corresponding to the braked surface.

11. The support panel retracting device according to claim 4, wherein: the main support piece of the support unit is also provided with a guide rail, the two side support pieces are respectively pivoted on two sides of the main support piece, the linkage unit comprises a carrying seat pivoted on the positioning piece, two support rods pivoted on the carrying seat, a linkage piece approaching to the first end and pivoted on the main support piece, a sliding sleeve connected with the linkage piece and sleeved on the positioning piece, a first connecting rod pivoted on the linkage piece, a second connecting rod pivoted on the carrying seat and pivoted with the first connecting rod, and a guide block pivoted on the second connecting rod, the guide block can be movably connected with the guide rail along the guide rail, and the support rods are propped against the bottom of the side support piece when the side support surface is in a unfolding state relative to the main support surface.

12. The support panel retracting device according to claim 4, wherein: the interlocking piece of the interlocking unit is provided with at least one shaft pivot hole, the shaft pivot hole is provided with a round hole part and a groove part concaved outwards from the round hole part, the braking unit further comprises at least one shaft rotating part pivoted to the shaft pivot hole, the shaft rotating part is provided with a cylindrical part and a protruding part convexly arranged outwards from the cylindrical part, when the cylindrical part of the shaft rotating part is sleeved in the round hole part, the protruding part can also penetrate through the groove part, and after the shaft rotating part pivots relative to the shaft pivot hole, the protruding part is staggered relative to the groove part.

13. The support panel retracting device according to claim 1, wherein: the brake block of the supporting unit is also provided with a limiting surface which is connected with the inner side end and is intersected with the brake surface, the limiting surface is substantially parallel to the first axial direction, and when the brake part of the brake unit is propped against the limiting surface, the side supporting surface is kept in an unfolding state relative to the main supporting surface.

14. The support panel retracting device according to claim 13, wherein: the guide part of the supporting unit is in a convex rib shape and is arranged on the braked block, and the guide part is substantially parallel to the side supporting surface and is intersected with the braked surface and the limiting surface.