CN209888909U - Rotation limiting device and folding trolley with rotating handrails - Google Patents

Abstract

The utility model belongs to the technical field of handrails, and in particular relates to a rotation limiting device and a foldable trolley with a rotating handrail. The rotation-limiting part is sleeved; a rotation-limiting part is formed on one side of the rotation-limiting part; The limiting device for limiting the rotation of the armrest, by pushing the unlocking switch to one side, the unlocking switch will drive the rotation limiting member to move on the rotating shaft, and at the same time the rotation limiting part will leave the rotation limiting sleeve, thereby compressing the fifth spring. The armrest can be rotated by turning the handrail by the slack. After releasing the unlocking switch, the extension force of the fifth spring will spring the rotation limiting member back to its original position, so as to realize automatic locking, which has the advantages of simple folding and convenient use.

Description

Rotation limiting device and folding trolley with rotating handrail

technical field

The utility model relates to the technical field of handrails, in particular to a rotation limiting device and a folding trolley with a rotating handrail.

Background technique

The structure of the handle of the existing stroller, especially the stroller, is mostly arc-shaped. It is integrated with the body. The handle set in this patent does not have a folding function, and cannot be folded independently. It is inconvenient to carry, occupies a large space, and cannot meet the needs of people. Even if some trolleys are provided with foldable armrests, However, due to its complex structure and inconvenient operation, it is rarely used in practical applications.

SUMMARY OF THE INVENTION

The purpose of the present utility model is to provide a rotation limiting device and a folding trolley with a rotating armrest, which can solve the problem of complicated folding structure and inconvenient operation by means of the rotation limiting member.

The purpose of the present utility model is achieved as follows: a rotation limiting device includes an unlocking switch for controlling the movement of the rotation limiting member, a rotating shaft is connected to the middle of the rotating armrest, and the outer circumference of the rotating shaft is slidably sleeved with the rotation limiting switch. A rotation-limiting part is formed on one side of the rotation-limiting part, and a rotation-limiting groove for the rotation-limiting part to be clamped into is provided on the end surface corresponding to the rotation shaft.

Preferably, a fifth spring is in contact with the end surface corresponding to the rotation shaft on the other side of the rotation limiting member, and the unlocking switch is fixed on the surface of the rotation limiting member.

A folding trolley with a rotating armrest, comprising a trolley main body, the main body comprising a rear leg tube, a front leg tube and a seat, a rotating armrest is installed on the seat and/or the front leg tube, and the rotation limiting device is arranged in the rotating armrest; A folding mechanism is arranged between the rear leg tube, the front leg tube and the seat, and the folding mechanism is used for controlling the folding between the rear leg tube and the front leg tube and for controlling the rotation of the seat towards the rear leg tube or the front leg tube.

Preferably, an unlocking button is installed in the folding mechanism, and when the upper end of the unlocking button is pressed, the seat and the rear leg can be rotated relative to each other; relative rotation.

Preferably, an upper bump is formed below the upper end of the unlocking button, and a first circular shaft for restricting the relative rotation between the seat and the rear leg tube is provided below the upper bump.

Preferably, a limit cover is installed on the folding mechanism, a first limit hole is opened on the limit cover, and one end of the first circular shaft corresponding to the upper bump passes through the first limit hole and forms a first pressing portion .

Preferably, the folding mechanism is provided with a first arc-shaped groove, the lower end of the seat is connected with a first rotating part, the first circular shaft is penetrated in the first rotating part, and the first arc slide in the groove.

Preferably, a second spring is installed in the first arc-shaped groove, and the second spring abuts between the first circular shaft and one end surface of the first arc-shaped groove.

Preferably, a first abutting member is further provided between the first circular shaft and the second spring, the first abutting member is fixed on the first rotating part, and when the first rotating part rotates, it will compress the first abutting member. Two springs; a first bearing is fixed in the limiting cover, a first sliding shaft is arranged in the first bearing, and one end of the first sliding shaft is transversely penetrated in the first limiting hole; The other end is in contact with a first spring, and pressing the first pressing part can compress the first spring and make the first circular shaft detach from the first limiting hole.

Preferably, a lower bump is formed below the lower end of the unlocking button, and a second circular shaft for restricting the relative rotation between the rear leg tube and the front leg tube is arranged below the lower bump; a limit cover is installed on the folding mechanism, The limit cover is also provided with a second limit hole, and one end of the second circular shaft corresponding to the lower protruding block passes through the second limit hole and forms a second pressing portion; a second arc is formed in the folding mechanism The upper end of the front leg tube is provided with a second rotating part, the second rotating part is provided with a second circular shaft, the second circular shaft slides in the second arc-shaped groove, and the other part of the second circular shaft One end is in contact with a third spring, and pressing the second pressing part can compress the third spring and make the second round shaft separate from the second limit hole; a second bearing is fixed in the limit cover, and the second bearing is inside A second sliding shaft is provided, one end of the second sliding shaft is transversely penetrated in the second limiting hole, a fourth spring is installed in the second arc-shaped groove, and the fourth spring abuts against the second circular shaft and the first circular shaft. Between one end surfaces of the two arc-shaped grooves, and between the second circular shaft and the fourth spring, a second abutting member is also arranged, and the second abutting member is fixed on the second rotating part, and the second rotating part is When rotating, the fourth spring will be compressed; a protective cover is installed on the folding mechanism, and a groove that is adapted to the round block is opened in the protective cover, and a round block is formed at the middle end of the unlocking button. The button is installed in the groove by swinging up and down through the round block, the upper end of the folding mechanism is respectively provided with a first rotation area and a second rotation area, and the lower end of the seat is rotatably arranged on the first rotation area through the first fastener. In the rotation area, the upper end of the front leg tube is rotatably arranged in the second rotation area through the second fastener.

Compared with the prior art, the present utility model has the following outstanding and beneficial technical effects:

1. The present utility model provides a rotation limiting device for restricting the rotation of the handrail. Push the unlocking switch to one side, and the unlocking switch will drive the rotation limiting member to move on the rotating shaft, and at the same time, the rotation limiting portion will leave the rotation limiter. After releasing the unlocking switch, the extension force of the fifth spring will spring the rotation limiter back to its original position, thereby realizing automatic locking, which has the advantages of simple folding, The advantage of ease of use.

2. The utility model uses a folding mechanism to connect the front leg tube, the seat and the rear leg tube respectively. When the upper end of the unlock button is pressed, the seat can be folded, and when the lower end of the unlock button is pressed, the seat can be folded. The legs of the seat are folded, and by pressing different parts on a button, the folding operation of the seat and the legs can be realized, so that the folding operation of the cart is very simple, and there is no need to fold the cart. To press the fold switch in two different positions.

Description of drawings

FIG. 1 is a schematic diagram of the three-dimensional structure of the present invention.

Figure 2 is an exploded view of the parts of the folding device of the present invention.

FIG. 3 is a schematic structural diagram of the folding device when the protective cover and the limiting cover are not installed.

FIG. 4 is a schematic view of the structure of the folding device when the protective cover is not installed.

Figure 5 is a schematic diagram of the structure of the unlock button and the round block.

FIG. 6 is a front view of the utility model.

FIG. 7 is a cross-sectional view of the structure at A-A in FIG. 6 .

FIG. 8 is an enlarged schematic view of the structure at D in FIG. 7 .

FIG. 9 is a cross-sectional view of the structure at C-C in FIG. 6 .

FIG. 10 is a cross-sectional view of the structure at B-B in FIG. 6 .

Figure 11 is an exploded view of the parts of the rotating armrest on the seat.

Figure 12 is an exploded view of the parts of the rotating armrest on the front leg tube.

Reference numerals: 1-front leg tube; 2-rear leg tube; 3-seat; 4-rear wheel; 5-front wheel; 6-folding mechanism; 7-unlocking button; 8-first turning area; 9-second Rotation area; 10-first fastener; 11-second fastener;

12-first arc groove; 13-first rotating part; 14-first round shaft; 15-limiting cover; 16-first limiting hole; 17-first pressing part; 18-upper bump; 19 - first spring; 20 - first bearing; 21 - first sliding shaft; 22 - second spring; 23 - first abutment;

24- the second arc groove; 25- the second rotating part; 26- the second round shaft; 27- the second limit hole;

28-second pressing part; 29-lower bump; 30-third spring; 31-second sliding shaft; 32-fourth spring;

33 - the second abutment; 34 - the second bearing;

35-rotation armrest; 36-unlock switch; 37-rotation shaft; 38-rotation limiter; 39-rotation limiter;

40-limiting groove; 41-fifth spring; 42-round block; 43-groove; 44-protective cover; 45-limiting cover.

Detailed ways

The specific embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings 1-12.

A rotation limiting device and a folding trolley with a rotating armrest.

9 and 11, it is the structure of the rotating armrest 35 on the seat 3. The rotating armrest 35 is provided with an unlocking switch 36 for controlling the rotation of the rotation limiting member 38, and the middle of the rotating armrest 35 is connected with a rotating shaft 37. The rotating shaft 37 A rotation-limiting member 38 is slidably sleeved on the outer circumference of the rotation-limiting member 38, a rotation-limiting outer sleeve 45 is sleeved on the outer circumference of the rotation-limiting member 38, and a rotation-limiting portion 39 is formed on one side of the rotation-limiting member 38. The rotation-limiting groove 40 into which the rotation-limiting portion 39 is clipped, the other side of the rotation-limiting member 38 and the end surface corresponding to the rotation shaft 37 are in contact with a fifth spring 41 , and the unlocking switch 36 is fixed on the rotation-limiting member 38 . Piece 38 surface.

10 and 12, the structure of the rotating armrest 35 on the front foot tube 1 is the same as the structure of the rotating armrest 35 on the seat 3. The rotating armrest 35 is provided with an unlock switch 36 for restricting its rotation, and the middle of the rotating armrest 35 is formed. There is a rotating shaft 37, the outer circumference of the rotating shaft 37 is slidably sleeved with a rotation-limiting member 38, the outer circumference of the rotation-limiting member 38 is sleeved with a rotation-limiting outer casing 45, and a rotation-limiting portion 39 is formed on one side of the rotation-limiting member 38. The rotation shaft 37 The corresponding end surface is provided with a rotation limiting slot 40 for the rotation limiting portion 39 to be inserted into. The other side of the rotation limiting member 38 and the end surface corresponding to the rotating shaft 37 are in contact with a fifth spring 41, and the unlocking The switch 36 is fixed on the surface of the rotation limiting member 38 .

As shown in Figure 1, the main body of the cart includes a rear leg tube 2, a front leg tube 1 and a seat 3; a folding mechanism 6 is arranged between the rear leg tube 2, the front leg tube 1 and the seat 3, and the folding mechanism 6 is used to control the rear leg tube 2 and the front leg tube 1 and is used to control the rotation of the seat 3 towards the rear leg tube 2 or the front leg tube 1. Both the seat 3 and the front leg tube 1 are provided with a rotating armrest 35. A rear wheel 4 is installed at the lower end, a front wheel 5 is installed at the lower end of the front leg tube 1, and an unlock button 7 is installed in the folding mechanism 6. By pressing the upper end of the unlock button 7, the space between the seat 3 and the rear leg tube 2 is opened. Relative rotation is possible; by pressing the lower end of the unlocking button 7, the front leg tube 1 and the rear leg tube 2 can be relatively rotated.

2 , the upper end of the folding mechanism 6 is provided with a first rotation area 8 and a second rotation area 9 respectively, and the lower end of the seat 3 is rotatably arranged in the first rotation area 8 through the first fastener 10 Inside, the upper end of the front leg tube 1 is rotatably arranged in the second rotation area 9 by means of a second fastener 11. In this technical solution, both the first fastener 10 and the second fastener 11 use bolts.

3 and 4 , a first arc-shaped groove 12 is formed on the first rotating area 8 , a first rotating part 13 is connected to the lower end of the seat 3 , and a first rotating part 13 penetrates through the first rotating part 13 . The circular shaft 14, the first circular shaft 14 restricts the sliding in the first arc-shaped groove 12; the second arc-shaped groove 24 is opened on the second rotation area 9, and the upper end of the front leg tube 1 is provided with a second arc-shaped groove 24. The rotating part 25 and the second rotating part 25 are provided with a second circular shaft 26 , and the second circular shaft 26 is restricted from sliding in the second arc-shaped groove 24 .

Referring to FIGS. 2 and 8 , a limit cover 15 is installed on the folding mechanism 6 , and a first limit hole 16 and a second limit hole 27 are respectively opened on the limit cover 15 . One end of the first circular shaft 14 Passing through the first limiting hole 16 and forming a first pressing portion 17 , one end of the second circular shaft 26 passing through the second limiting hole 27 and forming a second pressing portion 28 , and forming a lower portion of the upper end of the unlocking button 7 There is an upper bump 18 , the upper bump 18 corresponds to the first pressing portion 17 , a lower bump 29 is formed under the lower end of the unlocking button 7 , and the lower bump 29 corresponds to the second pressing portion 28 . The other end of a circular shaft 14 is in contact with a first spring 19 . Pressing the first pressing portion 17 can compress the first spring 19 and make the first circular shaft 14 separate from the first limiting hole 16 . The other end of the shaft 26 is in contact with the third spring 30 , and pressing the second pressing portion 28 can compress the third spring 30 and make the second round shaft 26 escape from the second limiting hole 27 .

3 and 4 , a first bearing 20 is fixed in the limit cover 15 , a first sliding shaft 21 is arranged in the first bearing 20 , and one end of the first sliding shaft 21 is laterally penetrated through the first limit hole 16, a second bearing 34 is fixed in the limiting cover 15, a second sliding shaft 31 is arranged in the second bearing 34, one end of the second sliding shaft 31 is transversely penetrated in the second limiting hole 27, A second spring 22 is installed in an arc-shaped groove 12 . The second spring 22 abuts between the first circular shaft 14 and one end surface of the first arc-shaped groove 12 , and a fourth arc-shaped groove 24 is installed in the second arc-shaped groove 24 . The spring 32 and the fourth spring 32 abut between the second circular shaft 26 and one end face of the second arc-shaped groove 24 , and a first abutting member is also provided between the first circular shaft 14 and the second spring 22 23. The first abutting member 23 is fixed on the first rotating part 13. When the first rotating part 13 rotates, the second spring 22 will be compressed. A second abutting member 33 is provided, the second abutting member 33 is fixed on the second rotating part 25 , and when the second rotating part 25 rotates, the fourth spring 32 will be compressed.

5 , a round block 42 is formed at the middle end of the unlocking button 7 , a protective cover 44 is installed on the folding mechanism 6 , and a groove 43 that is adapted to the round block 42 is opened in the protective cover 44 , the unlocking button 7 can be installed in the groove 43 by swinging up and down through the round block 42 .

The specific working principle of this scheme is as follows:

Rotate the folding of the armrest: push the unlocking switch 36 to one side, the unlocking switch 36 will drive the rotation limiting member 38, and at the same time will compress the fifth spring 41, and then the rotation limiting portion 39 will leave the rotation limiting slot 40, at this time The armrest can be rotated by turning the handrail by pressing the button, and the unlocking switch 36 is released, and the fifth spring 41 will spring the rotation limiting member 38 back to its original position, thereby realizing automatic locking.

Folding between the front leg tube 1 and the rear leg tube 2: The unlock button 7 is rotatably arranged in the groove 43 through the round block 42 at the middle end, so when the lower end of the unlock button 7 is pressed, the lower lower bump 29 will Push down and push the second round shaft 26 inward. At this time, the second round shaft 26 will be separated from the second limiting hole 27, and the third spring 30 will be compressed at the same time. At this time, one end of the second round shaft 26 will touch Connected to the third spring 30, the other end of the second round shaft 26 abuts in the arc-shaped groove provided on the inner wall of the limit cover 15, at this time the front leg tube 1 and the rear leg tube 2 can be rotated and folded relative to each other. The stretching force of the four springs 32 (originally in the compressed state) will promote the rotation of the leg tube, so that the rotation between the two is more labor-saving. The second sliding shaft 31 can be rotated. When the second circular shaft 26 enters or exits the second The limit hole 27 will slide past the surface of the second sliding shaft 31, making it easier to enter or exit the limit hole. When the trolley needs to be opened, manually rotate the front leg tube 1 and the rear leg tube 2. When reaching the second limiting hole 27 , the compressed third spring 30 will expand and the second round shaft 26 will spring into the second limiting hole 27 , thereby realizing automatic locking.

Folding between the seat 3 and the rear leg tube 2: The unlocking button 7 is rotatably arranged in the groove 43 through the round block 42 at the middle end, so when the upper end of the unlocking button 7 is pressed, the lower upper bump 18 will Push down and push the first round shaft 14 inward. At this time, the first round shaft 14 will be separated from the first limiting hole 16 and the first spring 19 will be compressed at the same time. At this time, one end of the first round shaft 14 will touch Connected to the first spring 19, the other end of the first circular shaft 14 abuts in the arc-shaped groove provided on the inner wall of the limit cover 15. At this time, the seat 3 and the rear leg tube 2 can be rotated and folded relative to each other. The extension force of the two springs 22 (originally in a compressed state) will cause the seat 3 to rotate, so that the rotation between the two is more labor-saving. The first sliding shaft 21 can be rotated. When the first circular shaft 14 enters or exits the When there is a limit hole 16, it will slide past the surface of the first sliding shaft 21, and it is easier to enter or exit the limit hole. When the trolley needs to be opened, manually rotate the seat 3 and the rear leg 2, when the first circular shaft When the 14 reaches the first limiting hole 16 , the compressed first spring 19 will open and the first round shaft 14 will spring into the first limiting hole 16 , thereby realizing automatic locking.

The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention There will also be various changes and improvements in the new model, which all fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. A rotation limiting device, characterized in that it comprises an unlocking switch (36) for controlling the movement of a rotation limiting member (38), a rotating shaft (37) is connected to the middle of the rotating armrest (35), and the rotating shaft (37) The rotation-limiting member (38) is slidably sleeved on the outer periphery of the rotation-limiting member (38), a rotation-limiting portion (39) is formed on one side of the rotation-limiting member (38), and the end face corresponding to the rotation shaft (37) is provided with a rotation-limiting part (39). The rotation-limiting groove (40) into which the part (39) is snapped. 2. A rotation limiting device according to claim 1, characterized in that: the other side of the rotation limiting member (38) and the end surface corresponding to the rotation shaft (37) are in contact with a fifth spring (41). ), the unlocking switch (36) is fixed on the surface of the rotation limiting member (38). 3. A folding trolley with a rotating armrest, comprising a trolley main body, the main body comprising a rear leg tube (2), a front leg tube (1) and a seat (3), characterized in that it includes any one of claims 1-2. The rotation limiting device, the seat (3) and/or the front leg tube (1) are provided with a rotating armrest (35), and the rotating armrest (35) is provided with the rotation limiting device; the rear leg tube (2), the front foot A folding mechanism (6) is arranged between the tube (1) and the seat (3), and the folding mechanism (6) is used for controlling the folding between the rear leg tube (2) and the front leg tube (1) and for controlling the seat ( 3) Rotation towards the side of the rear leg (2) or the front leg (1). 4. The folding trolley with a rotating armrest according to claim 3, wherein an unlocking button (7) is installed in the folding mechanism (6), and the upper end of the unlocking button (7) is pressed, and the seat ( 3) Relative rotation can be performed between the front leg tube (2) and the rear leg tube (2); by pressing the lower end of the unlocking button (7), the front leg tube (1) and the rear leg tube (2) can be relatively rotated. 5. The folding trolley with a rotating armrest according to claim 4, characterized in that: an upper bump (18) is formed under the upper end of the unlocking button (7), and a lower part of the upper bump (18) is provided with a A first circular shaft (14) that restricts the relative rotation between the seat (3) and the rear leg tube (2). 6 . The folding trolley with rotating armrests according to claim 5 , wherein a limit cover ( 15 ) is installed on the folding mechanism ( 6 ), and the limit cover ( 15 ) is provided with a first limit hole. 7 . (16), one end of the first circular shaft (14) corresponding to the upper bump (18) passes through the first limiting hole (16) and forms a first pressing portion (17). 7. The folding trolley with a rotating armrest according to claim 6, characterized in that: the folding mechanism (6) is provided with a first arc groove (12), and the lower end of the seat (3) is connected with a The first rotating part (13) is provided with the first circular shaft (14) through the first rotating part (13) and slides in the first arc groove (12). 8. The folding trolley with a rotating armrest according to claim 7, wherein a second spring (22) is installed in the first arc groove (12), and the second spring (22) abuts against the first arc groove (12). between a circular shaft (14) and one end face of the first arc-shaped groove (12). 9. The folding trolley with a rotating armrest according to claim 8, wherein a first abutting member (23) is further provided between the first circular shaft (14) and the second spring (22), The first abutting member (23) is fixed on the first rotating part (13), and when the first rotating part (13) rotates, it will compress the second spring (22); inside the limiting cover (15) A first bearing (20) is fixed, a first sliding shaft (21) is arranged in the first bearing (20), and one end of the first sliding shaft (21) is laterally penetrated in the first limiting hole (16); The other end of the first circular shaft (14) is in contact with a first spring (19), and pressing the first pressing part (17) can compress the first spring (19) and make the first circular shaft (14) separate from the The first limiting hole (16). 10. The folding trolley with a rotating armrest according to claim 9, characterized in that: a lower projection (29) is formed below the lower end of the unlocking button (7), and a lower projection (29) is provided below the lower projection (29) for a second circular shaft (26) for restricting the relative rotation between the rear leg tube (2) and the front leg tube (1); a limit cover (15) is installed on the folding mechanism (6), and the limit cover (15) is also provided with a There is a second limiting hole (27), and one end of the second circular shaft (26) corresponding to the lower bump (29) passes through the second limiting hole (27) and forms a second pressing portion (28); the The folding mechanism (6) is provided with a second arc-shaped groove (24), the upper end of the front leg tube (1) is provided with a second rotating part (25), and the second rotating part (25) is provided with a second circular groove. The shaft (26), the second circular shaft (26) slides in the second arc-shaped groove (24), and the other end of the second circular shaft (26) is abutted with a third spring (30), which presses the first The second pressing part (28) can compress the third spring (30) and make the second circular shaft (26) separate from the second limiting hole (27); the limiting cover (15) is fixed with a second bearing (34), a second sliding shaft (31) is arranged in the second bearing (34), one end of the second sliding shaft (31) is laterally penetrated in the second limiting hole (27), the second arc-shaped A fourth spring (32) is installed in the groove (24), the fourth spring (32) abuts between the second circular shaft (26) and one end face of the second arc-shaped groove (24), the second circular shaft (24) A second abutting member (33) is further arranged between the shaft (26) and the fourth spring (32), the second abutting member (33) is fixed on the second rotating part (25), and the second rotating part (25) When rotating, the fourth spring (32) will be compressed; a cover (44) is installed on the folding mechanism (6), and the cover (44) is provided with a fitting adapted to the round block (42). A groove (43), the middle end of the unlocking button (7) is formed with a round block (42), and the unlocking button (7) can be mounted in the groove (43) by swinging up and down through the round block (42), so The upper end of the folding mechanism (6) is respectively provided with a first rotation area (8) and a second rotation area (9), and the lower end of the seat (3) is rotatably arranged on the first fastener (10). In a rotation area (8), the upper end of the front leg tube (1) is rotatably arranged in the second rotation area (9) through a second fastener (11).

Images