Trundle of luggage case

Abstract

The utility model relates to a trundle of a luggage case, which comprises a trundle support, a trundle body and a trundle body locking component, the trundle body is arranged on two transverse sides of the trundle support through a wheel shaft, the trundle body locking component comprises a brake component and a traction component which are arranged on the trundle support, and the brake component is provided with a locking head which is correspondingly matched with a locking bayonet on the trundle body. The braking component is matched with an elastic element, the braking component is configured to be limited to slide on the trundle support in the longitudinal direction, the braking component comprises a driving bottom plate, a channel is formed in a vertical shaft installation part of the trundle support, and the traction component is connected to the driving bottom plate of the braking component through the channel. Lateral vertical plates are arranged on the two transverse sides, corresponding to the axial direction of the wheel shaft, of the driving bottom plate, the lateral vertical plates extend in the direction of the side close to the wheel shaft, the braking component is arranged at the bottom of the trundle support in a sleeving mode through a gap between the two lateral vertical plates, the lateral vertical plates are matched with the trundle support in a positioning and guiding mode, and the locking heads are arranged on the lateral vertical plates. The device has the advantages of convenient assembly and stable and reliable action.

Description

Technical Field

[0001] The utility model relates to luggage accessories, specifically to the casters of luggage. Background Art

[0002] To prevent the luggage from moving accidentally when it is in a stationary state, a braking system is configured on the luggage. Among them, the manually controlled handbrake braking system is a common design on the luggage. It controls the braking device on the caster through the operating part arranged on the top of the box body to achieve the braking of the caster. However, the braking mechanism of the caster on the existing luggage of this type adopts a swinging braking frame, and there is generally a problem of inconvenient assembly. Summary of the Invention

[0003] The invention object of the utility model: To overcome the defects existing in the prior art, the utility model provides a luggage caster with a sliding braking component, which is convenient to assemble, and has the advantages of stable and reliable operation of the braking frame.

[0004] To achieve the above object, the utility model provides the following technical solutions:

[0005] A luggage caster includes a caster bracket, a wheel body installed on the transverse sides of the caster bracket through a wheel axle, and a wheel body locking and unlocking assembly for locking / unlocking the wheel body. A plurality of locking notches are evenly distributed on the wheel body along the circumferential direction. The wheel body locking and unlocking assembly includes a braking component arranged on the roller bracket and a traction component for pulling the braking component. The braking component has a locking head corresponding to and cooperating with the locking notch. The braking component is provided with an elastic element for driving the braking component to reset so that the locking head withdraws from the locking notch. A channel leading to the braking component is provided in the vertical shaft installation part of the caster bracket. The traction component passes through the channel and is connected to the braking component. It is characterized in that: the braking component is configured to be restricted to slide longitudinally on the caster bracket. The braking component includes a driving bottom plate. The traction component is connected to the driving bottom plate. On the transverse sides of the driving bottom plate corresponding to the axial direction of the wheel axle, there are lateral vertical plates protruding longitudinally. The lateral vertical plates extend towards the side close to the wheel axle. The braking component is sleeved on the bottom of the caster bracket through the interval between the two lateral vertical plates, and the lateral vertical plates are in positioning and guiding cooperation with the caster bracket. The locking head is arranged on the lateral vertical plate.

[0006] Preferably, a guide post protrudes longitudinally on the driving bottom plate, and a guide hole is provided at the bottom of the caster bracket. The guide post is inserted into the guide hole for guiding cooperation.

[0007] Preferably, the elastic element is a spiral spring sleeved on the guide post. The guide hole has a spring positioning port with an enlarged diameter. One end of the spiral spring abuts against the driving bottom plate, and the other end of the spiral spring is inserted into the spring positioning port and abuts against the caster bracket.

[0008] Preferably, a convex portion protrudes from a side wall of the lateral vertical plate close to the roller bracket, and a concave mating surface lower than the convex portion is formed on the side of the convex portion. A convex platform corresponding to the position of the concave mating surface and a concave portion for the convex portion to be inserted are provided on the caster bracket.

[0009] Preferably, a guiding hole groove extending longitudinally is formed on the convex portion of the lateral vertical plate, and a hanging convex post protruding into the concave portion of the roller bracket is inserted into the guiding hole groove to restrict the lateral vertical plate from sliding on the roller bracket. A guiding convex block protrudes from the concave mating surface, and a sliding guiding groove is formed longitudinally on the convex platform of the roller bracket, and the guiding convex block is slidably fitted in the sliding guiding groove.

[0010] Preferably, the guiding convex block is in a T shape with a large head end and a small root end, and correspondingly, the sliding guiding groove is a convex-shaped groove adapted to the shape of the guiding convex block. The sliding guiding groove has an opening at the lower end, and the guiding convex block is slidably inserted into the sliding guiding groove along the opening at the lower end.

[0011] Preferably, a pin shaft is inserted into the roller bracket. Hanging convex posts inserted into the guiding hole grooves are formed at both ends of the pin shaft. One end of the pin shaft has a head, and the other end is formed into a limiting end head by riveting. An avoiding concave surface is recessed on the outer wall of the lateral vertical plate corresponding to the position of the convex portion, and the head and the limiting end head of the pin shaft are respectively placed on the avoiding concave surfaces of the corresponding lateral vertical plate.

[0012] Preferably, the guiding convex block and the guiding hole groove are respectively located on both sides of the locking head.

[0013] Preferably, the width of the concave portion is adapted to the width of the convex portion to form positioning and guiding for the convex portion.

[0014] Preferably, the traction member includes a traction steel wire. A spherical enlarged end is provided at the end of the traction steel wire. An insertion hole is provided on the driving bottom plate. A wire hanging buckle is fixed by buckling in the insertion hole. The wire hanging buckle includes a limiting disc portion and at least two buckling feet formed on the limiting disc. The limiting disc portion is provided with a hanging hole with a lateral opening. The hanging hole has a sunken port. The lateral opening of the hanging hole is correspondingly connected to a space between the two buckling feet. The traction steel wire is hung into the hanging hole along the lateral opening. The spherical enlarged end is placed in the sunken port and is in stop cooperation with the limiting disc. The wire hanging buckle is buckled in the insertion hole through the buckling feet.

[0015] By adopting the above technical solutions, the braking member is sleeved and slides at the bottom of the caster bracket. The braking member can be assembled more conveniently, and with the cooperation of the sliding mode, the braking member operates stably and reliably, thereby ensuring the stability and reliability of the braking and unlocking operations.

[0016] The present invention will be further described below with reference to the accompanying drawings. Description of the Drawings

[0017] Figure 1 Structural schematic diagram of the casters of the utility model for a luggage case;

[0018] Figure 2 Structural schematic diagram of the casters of the utility model for a luggage case after removing the wheel body;

[0019] Figure 3 is Figure 2 Cross-sectional view taken along line A-A in

[0020] Figure 4 Exploded view of the components on the caster bracket of the utility model. Specific embodiments

[0021] Refer to the attached Figures 1 - 4 , a caster for a luggage case disclosed by the utility model includes a caster bracket 1, a wheel body 2 installed on the transverse sides of the caster bracket 1 via a wheel axle 2-1, and a wheel body locking and unlocking assembly for locking / unlocking the wheel body 2. A plurality of locking notches 21 are evenly distributed along the circumferential direction on the wheel body 2. The wheel body locking and unlocking assembly includes a braking member 3 provided on the caster bracket 1 and a traction member 4 for pulling the braking member 3. The braking member 3 has a locking head 30 corresponding to and cooperating with the locking notch 21. The braking member 3 is cooperated with an elastic element 5 that drives the braking member 3 to reset so that the locking head 31 withdraws from the locking notch 21. A channel 110 leading to the braking member is provided in the vertical axle installation part 11 of the caster bracket 1. A hollow vertical axle 6 is inserted on the vertical axle installation part 11 of the caster bracket 1. The hollow cavity of the vertical axle 6 constitutes a part (as shown in the embodiment drawings) or all of the channel 110. The traction member 4 is connected to the braking member 3 through the channel 110. The braking member 3 is configured to be restricted from sliding longitudinally (such as Figure 2 the direction where the X-axis is located in Figure 2 the caster bracket 1). The braking member 3 includes a driving bottom plate 31. The traction member 4 is connected to the driving bottom plate 31. On the transverse sides of the driving bottom plate 31 corresponding to the axial direction of the wheel axle 2-1, there are lateral vertical plates 32 protruding longitudinally (such as Figure 2 the direction where the X-axis is located in

[0022] To further improve the stable and reliable operation of the braking component after installation, a guide post 311 protrudes longitudinally on the driving base plate 31, and a guide hole 12 is provided at the bottom of the caster bracket 1. The guide post 311 is inserted into the guide hole 12 for guiding cooperation. A corresponding guiding structure design is also adopted on the driving base plate 31 to improve the stable operation of the braking component. To ensure the compactness of the structure, the elastic element 5 is a spiral spring sleeved on the guide post 311. The guide hole 12 has a spring positioning port 121 with an enlarged diameter. One end of the spiral spring is supported on the driving base plate 31, and the other end of the spiral spring is inserted into the spring positioning port 121 and supported on the caster bracket 1. In this way, the guide post also realizes the positioning and installation of the elastic element 5. In this specific embodiment, two guide posts 311 are designed symmetrically on both sides of the center of the driving base plate 31. Of course, it can also be a single guide post design at the center position.

[0023] In this specific embodiment, there are many designs of the structure for realizing sliding positioning and guiding in the prior art. Those skilled in the art can complete the corresponding conventional selection design in combination with the prior art under the guidance of the present invention, such as using the positioning and guiding cooperation of a track groove and a track protrusion. However, in order to better adapt to the positioning cooperation on the caster, the following optimized design is adopted: a convex portion 321 protrudes on one side wall of the lateral vertical plate 32 close to the roller bracket 1, and a concave mating surface 322 lower than the convex portion 321 is formed on the side of the convex portion 321. A convex platform 13 corresponding to the position of the concave mating surface 322 and a concave portion 14 for the convex portion 321 to be placed in are provided on the caster bracket 1. The surfaces of the lateral vertical plate and the roller close to each other are in concave-convex cooperation to realize the corresponding avoidance and concave-convex positioning. Preferably, by optimizing the width dimension, the width of the concave portion 14 is adapted to the width of the convex portion 321 to achieve the positioning and sliding guiding of the concave portion to the convex portion.

[0024] More importantly, based on the above design, a longitudinally extending guiding hole groove 323 is formed in the convex portion 321 of the side vertical plate 32. A hanging convex column 151 is protruded in the concave portion 14 of the roller bracket 1. The hanging convex column 151 is inserted into the guiding hole groove 323 to restrict the sliding of the side vertical plate 32 on the roller bracket 1. A guiding convex block 324 is protruded on the concave mating surface 322. A sliding guiding groove 131 is longitudinally formed in the convex platform 13 of the roller bracket 1. The guiding convex block 324 is slidably engaged in the sliding guiding groove 131. By using the position avoidance relationship of the above convex portion, concave mating surface, convex platform and concave portion, and further adopting the design of guiding hole groove, hanging convex column, guiding convex block and sliding guiding groove at corresponding positions, a compact and reliable sliding positioning design is realized, with a compact structure, reliable guiding cooperation between the side vertical plate 32 and the roller bracket, and at the same time, the cooperation between the hanging convex column 151 and the guiding hole groove 323 can restrict the braking member 3 on the roller bracket 1. And the hanging convex column is realized by a pin shaft, which is convenient for assembly and can reliably restrict the braking member on the roller bracket. Specifically, a pin shaft 15 is inserted into the roller bracket 1. Both ends of the pin shaft 15 form hanging convex columns 151 inserted into the guiding hole groove 323. One end of the pin shaft 15 has a head 152, and the other end is formed with a limiting end 153 by riveting. To achieve a compact design of the structure, an avoidance concave surface 325 is recessed in the outer wall of the side vertical plate 32 corresponding to the convex portion 321. The head 152 and the limiting end 153 of the pin shaft are respectively placed on the avoidance concave surface 325 of the corresponding side vertical plate 32.

[0025] Further, the guiding convex block 324 is in a T shape with a large head end and a small root end. Correspondingly, the sliding guiding groove 131 is a convex-shaped groove adapted to the shape of the guiding convex block 324. The sliding guiding groove 131 has an opening at the lower end. The guiding convex block 324 is slidably inserted into the sliding guiding groove 131 along the lower end opening 1311. In this way, restrictions are achieved in the arrangement directions of the two side vertical plates to ensure the stable and reliable operation of the braking member.

[0026] To ensure the stable position of the locking head 30 and the stable and reliable locking action, the guiding convex block 324 and the guiding hole groove 323 are respectively located on both sides of the locking head 30.

[0027] Among them, the traction member can be a shaft-like component or a flexible cord design. In this specific embodiment, it is a bendable traction steel wire. To achieve a convenient and reliable connection of the traction steel wire to the braking member, the following optimized design is adopted. The traction member 4 includes a traction steel wire 40. The end of the traction steel wire 40 is provided with a spherical enlarged end 41. An insertion hole 312 is provided on the driving bottom plate 31. A wire hanging buckle 313 is fixed by clamping in the insertion hole 312. The wire hanging buckle 313 includes a limiting disc portion 3131 and at least two buckling feet 3132 formed on the limiting disc 3131. The limiting disc portion 3131 is provided with a hanging hole 3130 with a lateral opening. The hanging hole 3130 has a recessed port. The lateral opening of the hanging hole 3130 is correspondingly connected to one of the intervals between the two buckling feet 3132. The traction steel wire 40 is hung into the hanging hole 3130 along the lateral opening. The spherical enlarged end 41 is placed in the recessed port and is in a stop fit with the limiting disc 3131. The wire hanging buckle 313 is buckled in the insertion hole through the buckling feet 3132. The traction steel wire is hung into the hanging hole along the lateral opening, and the spherical enlarged end is placed in the recessed port to prevent the spherical enlarged end from protruding too much. The two buckling feet of the wire hanging buckle are inserted into the insertion hole and buckled and fixed. The lateral shielding is realized through the hanging hole to prevent the traction steel wire from slipping out laterally. The disassembly and assembly of the traction steel wire are relatively convenient.

Claims

1. A suitcase caster, comprising a caster bracket, a wheel body mounted on both sides of the caster bracket via a wheel axle, and a wheel body locking assembly for locking / unlocking the wheel body, a plurality of locking bayonet holes evenly distributed on the wheel body along the circumferential direction, the wheel body locking assembly comprising a braking member arranged on the roller bracket and a traction member for traction of the braking member, the braking member having a locking head corresponding to the locking bayonet hole, the braking member being equipped with an elastic element for driving the braking member to reset until the locking head exits the locking bayonet hole, a channel leading to the braking member is provided in the vertical axis mounting portion of the caster bracket, the traction member is connected to the braking member through the channel, and the characteristics are as follows: The braking member is configured to limit longitudinal sliding on the caster bracket, the braking member includes a driving base plate, the traction member is connected to the driving base plate, and the driving base plate is provided with longitudinally raised lateral vertical plates on both lateral sides corresponding to the axial direction of the wheel axle, and the lateral vertical plates extend toward the side close to the wheel axle. The braking member is sleeved on the bottom of the caster bracket through the interval between the two lateral vertical plates, and the lateral vertical plates are matched with the positioning guide of the caster bracket, and the locking head is arranged on the lateral vertical plates.

2. The suitcase caster according to claim 1, characterized in that: A guide column is longitudinally protruded on the driving bottom plate, and a guide hole is provided at the bottom of the caster bracket. The guide column is inserted into the guide hole for guiding and matching.

3. The suitcase caster according to claim 2, characterized in that: The elastic element is a coil spring sleeved on the guide column, the guide hole has a spring positioning port with an enlarged diameter, one end of the coil spring is supported on the driving base plate, and the other end of the coil spring is inserted into the spring positioning port and supported on the caster bracket.

4. The suitcase caster according to claim 1, 2 or 3, characterized in that: A convex portion is raised on one side wall of the lateral vertical plate close to the roller bracket, and a concave matching surface lower than the convex portion is correspondingly formed on the side of the convex portion. The caster bracket is provided with a boss corresponding to the position of the concave matching surface, and a concave portion for the convex portion to be placed.

5. The suitcase caster according to claim 4, characterized in that: A guide hole groove extending in the longitudinal direction is provided on the convex part of the lateral vertical plate, and a hanging boss is provided in the concave part of the roller bracket, and the hanging boss is inserted into the guide hole groove to limit the sliding of the lateral vertical plate on the roller bracket; a guide protrusion is protruded on the concave matching surface, and a sliding guide groove is provided on the boss of the roller bracket in the longitudinal direction, and the guide protrusion is slidably matched in the sliding guide groove.

6. The suitcase caster according to claim 5, characterized in that: The guide protrusion is T-shaped with a large head end and a small root end, and the corresponding sliding guide groove is a convex groove adapted to the shape of the guide protrusion. The sliding guide groove has a lower end opening, and the guide protrusion is slidably inserted into the sliding guide groove along the lower end opening.

7. The suitcase caster according to claim 5, characterized in that: A pin is inserted on the roller bracket, and both ends of the pin form hanging bosses inserted into the guide hole grooves. One end of the pin has a head, and the other end is riveted to form a limit end. An avoidance concave surface is recessed at the corresponding convex position of the outer wall of the lateral vertical plate, and the head and the limit end of the pin are respectively placed on the avoidance concave surfaces of the corresponding lateral vertical plates.

8. The suitcase caster according to claim 5, characterized in that: The guide protrusion and the guide hole groove are respectively located on two sides of the locking head.

9. The suitcase caster according to claim 4, characterized in that: The width of the concave portion is adapted to the width of the convex portion to form a positioning guide for the convex portion.

10. The suitcase caster according to claim 1, characterized in that: The traction component includes a traction steel wire, and the end of the traction steel wire is provided with a spherical enlarged end. The driving base plate is provided with an insertion hole, and a wire hanging buckle is fixed in the insertion hole by a buckle. The wire hanging buckle includes a limit plate part and at least two buckle pins formed on the limit plate. The limit plate part is provided with a hanging hole with a lateral opening, and the hanging hole has a recessed port. The lateral opening of the hanging hole is connected to a corresponding interval between the two buckle pins. The traction steel wire is hung in the hanging hole along the lateral opening, and the spherical enlarged end is placed in the recessed port and cooperates with the limit plate stopper. The wire hanging buckle is installed in the insertion hole through the buckle pin.

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