TWI594910B - Wheel lock structure prevents accidental slipping of the cart - Google Patents

Description

Wheel lock structure capable of preventing accidental sliding of the cart

The invention relates to a wheel locking structure capable of preventing accidental sliding of a trolley, in particular to pivoting a locking block on a wheel hub of the wheel, so that when the user parks the trolley, the locking block can be directed toward the axle by its own weight. The through-groove of the main body is poured or protruded to be embedded in the through-groove to fix the wheel so that it cannot be rotated, so that the cart does not have to worry about the sliding of the cart even if it is parked on an inclined road surface.

According to the rapid development of the economy and the advancement of technology, people will no longer simply compare the price when purchasing goods, but will consider it as consumption according to the operability, convenience, durability and even safety. Taking "baby strollers" as an example, in the past, caregivers such as newborn parents and full-time babysitters paid more attention to the comfort, push sensitivity or portability of the car when purchasing a stroller. However, in recent years, Many caregivers have been obsessed with the accidents caused by the slipping of the stroller. They have repeatedly jumped into the news page and made the safety mechanism of the stroller a priority for manufacturers.

In many accidents, the stroller has been parked still by the caregiver, because the caretaker leaves the handlebar of the stroller with both hands. At this time, the stroller is affected by external force (such as pedestrian collision) or because the road is tilted. Sliding, and then collisions, overturns and so on. Although, there are many improved strollers on the market that can improve the stability of strollers when they are parked. Sex, but did not effectively solve the aforementioned unexpected problems.

Referring to FIG. 1 , it is a base structure of a baby stroller, including a wheel axle 10 and two wheels 11 . The bottom of the axle 10 is provided with a brake rod 102 , and the wheel hub 111 of the wheel 11 is provided with a plurality of axles 111 . The brake hole 112, when the caregiver wants to park the baby carriage, can step on the brake switch 101 on the base with the foot, and extend the brake lever 102 toward the wheel 11 to be inserted into the brake hole 112 to ensure that the brake hole 112 is inserted into the brake hole 112. The wheel 11 can be completely stationary, and when the caregiver releases the brake switch 101, the brake lever 102 will be driven by a return spring 103 and pulled back into position.

Although the above structure of the stroller can effectively ensure that the wheel 11 is in a static state and is operated in a stepping manner, the caregiver can be more comfortable in use, however, the stroller cannot pass the brake switch 101 and the brake lever 102. Solve the problem of "small car accidental sliding", that is, when the caregiver locks the wheel 11 by stepping on the brake switch 101, once the hand leaves the handle and the foot leaves the brake switch 101, the baby carriage is impacted by external force. Or when the road is tilted, it will still start to slide, and there are security concerns.

The inventor found that the design of all the strollers currently on the market is "to enable the caregiver to operate a switch to "lock" the wheel", but all kinds of accidents are caused by the caregiver's temporary observation (such as : I think that it is only a short time to open my hands and think that the road surface is stable. Therefore, even if the operator designs a well-functioning wheel locking device, if the caregiver fails to operate due to negligence, there may still be an accident, so how Designing a more intuitive and improved structure, so that the caregiver does not need to actively operate and fix the wheel to achieve a more perfect safety mechanism, is an important subject to be solved by the present invention.

In view of the various strollers on the market, it is impossible to avoid the baby stroller after parking. The influence of the force or the inclination of the road surface leads to the problem of accidental sliding. The inventor has, after many years of research, testing and improvement, based on years of research and development experience, finally designed a wheel locking structure of the present invention which can prevent the accidental sliding of the cart. It can provide a stroller locking structure that is easy to implement, safer and more convenient to operate.

An object of the present invention is to provide a wheel locking structure capable of preventing accidental sliding of a cart, which is applied to a cart, and the bottom of the cart is provided with at least one axle, and two ends of the axle are respectively provided with a wheel. The wheel lock structure includes a main seat body, a latching block and a releasing device. The main seat system is disposed on the axle adjacent to one of the wheels, and the main seat body is adjacent to a side of the wheel hub of the wheel a ring wall is disposed in the circumferential direction, and a hole is formed in the ring wall. The main body is further provided with a through slot in the axial direction, and one end of the through slot is exposed through the card hole to the main body. One side of the other end can be connected to the other side of the main body; the portion of the locking block adjacent to one end is pivotally connected to the main body of the hub, and the other end is convex The card engaging portion can protrude toward the ring wall or the inserting hole by the weight of the locking block itself, and the engaging portion can abut the ring during the rotation of the wheel a wall and the displacement of the card portion to a position corresponding to the card hole The insertion portion can be inserted into the through slot due to the weight of the locking block itself; the release device includes a release block, a slider, a return spring and a connecting line, and the release block is movable Positioning in the through slot, one end of the slot is facing the card insertion hole; the slider is movably disposed on the axle adjacent to the other side of the main body, and the slider is One end of the other side of the main body is connected to the other end of the release block; one end of the return spring is connected to the other side of the main seat or the axle, and the other end is connected to the slider The slider can be connected to a control switch through the connecting line, so that when the control switch is activated, the connecting line can face the slider toward the other side of the main body Displacement, thereby causing the release block to be displaced toward the insertion hole to push the locking block out of the through slot; conversely, when the control switch is not activated, the return spring will transmit through the elastic restoring force The slider displaces the slider in a direction away from the other side of the main body, so that the release block is retracted into the through slot, and a distance is maintained from the card hole, so that the card can be re-embedded Into the through slot. In this way, when the cart is stationary, since the locking block can be automatically inserted into the through slot, the wheel can be locked and cannot be rotated, thereby preventing the cart from gradually sliding due to external force or tilting due to the road surface. And there is an unexpected problem.

In order to have a better understanding and understanding of the technical features, modes of operation and purposes of the present invention, the embodiments are described in detail with reference to the following figures:

[study]

10‧‧‧Axle

101‧‧‧Stepping switch

102‧‧‧煞车杆

103‧‧‧Return spring

11‧‧‧ Wheels

111‧‧·wheels

112‧‧‧煞Car hole

〔this invention〕

20‧‧‧Axle

21‧‧‧ Wheels

22‧‧·wheels

220‧‧‧ accommodating slots

3‧‧‧ wheel locking structure

31‧‧‧ main seat

311‧‧‧Circle

312‧‧‧Ink hole

313‧‧‧through slots

32‧‧‧ card block

320‧‧‧First pivot

321‧‧‧ embedded card department

322‧‧‧Heavy Department

4‧‧‧ release device

41‧‧‧ release block

42‧‧‧ Slider

43‧‧‧Return spring

44‧‧‧Control switch

440‧‧‧Connecting line

5‧‧‧Hands

51‧‧‧ Holding the seat

510‧‧‧ accommodating space

511‧‧‧Installation slot

52‧‧‧Connecting pieces

53‧‧‧ Pressing elements

530‧‧‧Second pivot

L‧‧‧ longitudinal axis

1 is a schematic view of a wheel lock structure of a conventional cart; FIG. 2 is a schematic view of a wheel lock structure of the present invention; FIG. 3 is a schematic cross-sectional view of a wheel lock structure of the present invention; and FIG. 4 is a wheel lock of the present invention; Schematic diagram of the locking block in the structure; and 5A and 5B are schematic diagrams of the control switch of the wheel locking structure of the present invention.

The present invention is a wheel locking structure capable of preventing accidental sliding of a cart. Referring to Figures 2 and 3, in a first preferred embodiment of the present invention, the wheel locking structure 3 is applied to a cart (e.g., On the stroller, in order to highlight the structural focus of the case, in the second picture, only the bottom of the cart is drawn, and in the lower left corner of Figure 2, the "outer side" of the stroller and the upper right corner are the stroller. "Inside", together with Chen Ming.

The bottom of the cart is provided with at least one axle 20, and two ends of the axle 20 are respectively provided with a wheel 21, the wheel lock structure 3 includes a main seat body 31, at least one locking block 32 and a release device 4, the main The seat body 31 is disposed on the axle 20 adjacent to one of the wheels 21, and the main seat body 31 is provided with a ring wall 311 on a side surface of the hub 22 of the wheel 21 (in FIG. 2, One side of the main seat body 31 is a complete plane, but in fact, for the locking block 32 to be described later, it will only contact the position of the ring wall 311, and the ring wall 311 is abutted. Or very close to the hub 22.

An insertion hole 312 is defined in the ring wall 311, and a through hole 313 is defined in the axial direction. One end of the through hole 313 is exposed through the insertion hole 312 to one side of the main seat 31. The other end can be connected to the other side of the main seat body 31.

The locking block 32 is pivotally disposed on the inner side of the hub 32 through a first pivot 320. Please refer to FIGS. 2~4, and FIG. 3 is a cross-sectional view of FIG. 2, the locking block 32 is adjacent to the block 32. The portion of one end is pivoted to the position of the main body 31 above the hub 22, and the other end of the hub 22 is convexly provided with an engaging portion 321 which can be engaged by the locking block 32 when the wheel 21 is stationary. The weight of the self protrudes toward the ring wall 311 or the insertion hole 312. During the rotation of the wheel 21, when the position of the insertion portion 321 corresponds to the ring wall 311, the insertion portion 321 Will abut against the ring wall 311, so as not to cause difficulty on the rotation of the wheel 21; and when the insertion portion 321 is displaced to a position corresponding to the position of the insertion hole 312, the insertion portion 321 will be able to The weight of the locking block 32 itself is inserted into the through groove 313. At this time, the wheel 21 cannot continue to rotate and is locked in a fixed state.

Since the wheel locking structure of the present invention is designed such that "on the stand of the cart, the locking block 32 will be embedded in the through slot 313 to lock the wheel 21", so that after the caretaker stops the cart, it is completely There is no need to actively press any switch as long as the latching block 32 is displaced to the corresponding The position of the insertion hole 312 (the locking block 32 necessarily corresponds to the insertion hole 312 in one rotation of the wheel 21), that is, it is automatically embedded in the through groove 313, so as to realize the locking function, so that the trolley is not affected Sliding by external force or slope influence.

As can be seen from the foregoing, the structure of the present invention automatically locks the cart into a locked state. When the caregiver wants to push the cart, the "release device 4" needs to be unlocked. For details, see Figures 2~3. The release device 4 includes a release block 41, a slider 42, a return spring 43, and a connecting wire 440. The release block 41 is movably positioned in the through slot 313, and one end thereof faces the card insertion hole. The slider 42 is movably disposed on the axle 20 adjacent to the other side of the main seat 31, and the end of the slider 42 is opposite to the other side of the main seat 31. The other end of the release block 41 is connected.

One end of the return spring 43 is connected to the other side of the main seat 31 or the axle, and the other end of the return spring 43 is connected to the slider 42 so as to be able to limit the slider 42 relative to the slider 42 The position of the main body 31; the connecting line 440 is extended by a control switch 44, and the slider 42 can be connected to the control switch 44 through the connecting line 440, when the control switch 44 is activated, The connecting wire 440 can push or pull the slider 42 toward the other side of the main body 31 to displace the release block 41 in the direction of the insertion hole 312 to push the locking block 32 out of the through slot 313. Otherwise, when the control switch 44 is not activated, the return spring 43 will transmit the elastic restoring force, push the slider 42 to displace the slider 42 away from the other side of the main seat 31, and release The block 41 is retracted into the through slot 313 and spaced apart from the insert hole 312 so that the latching block 32 can be re-engaged into the through slot 313.

Therefore, when the user wants to push the cart, the control block 44 only needs to push the locking block 32 out through the through slot 313, so that the wheel 21 can be normally rotated, and when the cart is When the forward speed reaches a predetermined value, the locking block 32 swings away from the through slot 313 due to the centrifugal force. Therefore, even if the user releases the control switch 44, the locking block 32 is also It is not embedded in the through slot 313; and when the user stops the cart, even if the cart slides due to the inclination of the terrain, the latching block 32 is embedded into the position of the insert hole 312. The through-groove 313 fixes the wheel 21 so that the cart does not continue to slide, thereby effectively preventing the cart from accidentally sliding, thereby causing a problem of injuring the infant or the infant inside the vehicle.

In this embodiment, one end of the return spring 43 is connected to the other side of the main seat 31, and the other end is connected to one end of the slider 42, but one end of the return spring 43 can also be fixed to Thus, the position of the slider 41 can also be limited on the axle 20.

In addition, as shown in FIG. 2 to FIG. 4 , at least one accommodating groove 220 is recessed on one side of the hub 22 , and the locking block 32 is pivotally connected to the inner wall surface of the accommodating groove 220 (the first A pivot 320 is inserted through the accommodating groove 220). In the embodiment, the insertion hole 312 and the through slot 313 are disposed at a position adjacent to the top of the main body 31. Therefore, the locking block 32 is When the position corresponding to the top of the main body 31 is rotated, the card portion 321 is protruded toward the insertion hole 312 by the weight of the main body 31. However, if the card hole 312 and the through slot 313 are formed, Designed at a position corresponding to the bottom of the main seat body 31, when the locking block 32 is rotated to a position corresponding to the bottom of the main seat body 31, the locking block 32 can still make the card-incorporating portion due to its own weight. The 321 is tilted in the direction of the insertion hole 312, and the function of locking the wheel 21 is also exerted.

In addition, as shown in FIGS. 3 and 4, in order to prevent the wheel 21 from rotating, the locking block 32 can naturally protrude from the receiving groove 220. The structure of the locking block 32 must be specially designed. In FIG. 4, the locking block 32 can be divided into a left half and a right half through its longitudinal axis L, wherein the right half (ie, the locking block 32 faces the main seat) One side of 31 The card portion 321 has a weighted portion 322 on the left half (ie, the other side), and the weight portion 322 may be made of a metal having a higher density, or the weight may be locked on the locking block 32. The weight of the weighting portion 322 is formed to be larger than the insertion portion 321 . Thus, the locking portion 322 can be protruded from the receiving groove 220 when the locking block 322 is not affected by the external force and naturally hangs. outer.

In addition, in the embodiment, the structure of the control switch 44 is as follows. Referring to FIG. 2 to FIG. 5A, the control switch 44 includes a holding body 51, a connecting member 52 and a pressing member 53. The holding body 51 is disposed on the handle 5 of the cart, and has an accommodating space 510. The holding body 51 is further provided with a mounting slot 511, and the mounting slot 511 is coupled to the accommodating space. 510 is connected.

As shown in FIG. 5A and FIG. 5B , the connecting member 52 is disposed in the accommodating space 510 , and the connecting wire 440 can be wound on the connecting member 52 . The connecting member 52 can be a roller and is pivoted. Connected to the holding body 51 to rotate and drive the connecting wire 440, but a fixed cylinder can also be used; the middle portion of the pressing member 53 is pivotally connected to the second pivot 530. One end of the pressing space 510 is adjacent to the mounting slot 511, and one end of the pressing member 53 can pass through the mounting slot 511 to extend outside the holding base 51, and the other end of the space 510 is located in the receiving space 510 adjacent to the The position of the engaging member 52 is such that the other end of the pressing member 53 can be displaced away from the engaging member 52 in the case where one end of the pressing member 53 is pressed toward the receiving space 510 to connect the connecting member The line 440 is pulled into the accommodating space 510.

Since one end of the pressing member 53 is directed to the outside of the handle 5 (ie, corresponding to the palm of the caregiver), when the caregiver wants to push the cart, only the two hands are required to grasp the grip body 51. The palm of the hand can naturally press the pressing member 53 to drive the release device 4 to release the locked state of the wheel 21. In addition, the second pivot 530 of the pressing member 53 can be added A pivot spring is disposed, the two ends of the pivot spring being respectively connectable to the second pivot 530 and the pressing member 53 for one end of the pressing member 53 when the caregiver leaves the handle 5 and the control device 44 with both hands. That is, it is driven by the pivot spring, and is re-exposed to the outside of the holding body 51, so that the connecting wire 440 is loosened, and the slider 41 and the releasing block 42 are driven by the return spring 43, and the locking block is driven. 32 can be embedded in the through slot 313 to restore the locked state.

In particular, the control switch 44 pulls the connecting wire 440 in a plurality of ways. It can be designed to be stepped on as in the prior art of FIG. 1 or can be designed as a bicycle structure. The manner in which the palm is pressed scrolls the connecting line 440. Since its structure is not the core focus of the present invention, it will not be described one by one.

The above description is only a few preferred embodiments of the present invention, but the technical features of the present invention are not limited thereto, and those skilled in the relevant art can easily think about changes after considering the technical content of the present invention. They should not depart from the scope of protection of the present invention.

20‧‧‧Axle

21‧‧‧ Wheels

22‧‧·wheels

220‧‧‧ accommodating slots

31‧‧‧ main seat

313‧‧‧through slots

32‧‧‧ card block

320‧‧‧First pivot

41‧‧‧ release block

42‧‧‧ Slider

43‧‧‧Return spring

44‧‧‧Control switch

440‧‧‧Connecting line

Claims (6)

A wheel locking structure capable of preventing accidental sliding of a cart is applied to a cart. The bottom of the cart is provided with at least one axle. The two ends of the axle are respectively provided with a wheel. The wheel locking structure comprises: a main seat The body is disposed on the axle adjacent to one of the wheels, and a side wall of the hub of the wheel is circumferentially disposed with a ring wall, and the ring wall defines a card insertion hole. A through slot is further disposed in the axial direction of the base body, and one end of the through slot is exposed to one side of the main seat through the card hole, and the other end is connected to the other side of the main body; at least a card stop block, the portion adjacent to one end is pivotally connected to the main body of the hub, and the other end is convexly provided with a card insertion portion, and the card portion can be weighted by the card block itself Projecting toward the ring wall or the insertion hole, the card portion can abut against the ring wall during the rotation of the wheel, and the card portion is displaced to correspond to the card hole In the position of the position, the card portion can be embedded due to the weight of the card block itself. And a release device comprising: a release block movably positioned in the through slot, one end of which faces the card insertion hole; and a slider movably disposed on the axle Adjacent to the other side of the main body, and one end of the slider on the other side of the main body is connected to the other end of the release block; a return spring is connected to the end The other side of the main body or the axle, the other end of which is connected to the slider; and a connecting line through which the slider can be connected to a control switch to be activated when the control switch is activated The connecting wire can displace the slider toward the other side of the main body, thereby displace the releasing block toward the insertion hole to push the locking block out When the control switch is not activated, the return spring will transmit the elastic recovery force to push the slider to displace the slider away from the other side of the main body. The release block is retracted into the through slot and spaced from the card hole so that the latch block can be re-inserted into the through slot. The wheel lock structure of claim 1, wherein one end of the return spring is coupled to the other side of the main seat, and the other end is coupled to one end of the slider. The wheel locking structure of claim 2, wherein the card hole and the through slot are disposed at a position adjacent to the top of the main body. The wheel lock structure of claim 1, wherein the one side of the hub is recessed with at least one receiving groove, and the locking block is pivotally connected to the inner wall surface of the receiving groove. The wheel locking structure of claim 4, wherein the locking block is convexly disposed on a side of the main body, and the other side is provided with a weighting portion, and the weight of the weighting portion is The insertion portion is larger than the insertion portion, so that the insertion portion can protrude outside the receiving groove when the locking block is not affected by an external force. The wheel lock structure of claim 5, wherein the control switch comprises: a grip body disposed on the handle of the cart, and an accommodating space is disposed therein, the grip body is still provided a mounting slot is connected to the accommodating space; a connecting member is disposed in the accommodating space, the connecting wire can be wound on the connecting member; and a pressing member, wherein the connecting portion Positioning in the accommodating space adjacent to the mounting slot, one end of the pressing member can pass through the mounting slot to extend to the outside of the holding seat, and the other end is located in the accommodating space adjacent to the connecting The position of the member is such that, when one end of the pressing member is pressed toward the accommodating space, the other end of the pressing member can be displaced away from the engaging member to pull the connecting wire into the accommodating In space.