Brake operating device for casters of cases and bags

Abstract

Provided is a brake operating device for a case and a bag caster that reduces precision requirements, facilitates assembly, and ensures a stable and highly reliable brake. 【Solution means】It includes an attachment box 1, an operation part 2, a drive connection assembly, and a brake cable 3. The brake cable includes a cable sleeve and a slidable cable core inserted into the cable sleeve. The operation part is connected to the cable core of the brake cable via the drive connection assembly. The drive connection assembly includes a traction slider, which is configured to be restricted within the attachment box and reciprocally slide along the traction direction of the cable core of the brake cable. The traction slider is connected to the operation part. A spring attachment part is provided on the traction slider, a tension spring is attached to the spring attachment part, and the other end of the tension spring opposite to the end connected to the spring attachment part is tractionably connected to the cable core of the brake cable. The tension spring and the brake cable correspond one-to-one.

Description

Technical Field

[0001] The present invention relates to accessories for cases and bags, and more specifically to an operating device in a brake system for casters for cases and bags.

Background Art

[0002] Brake devices are widely used in case and bag products such as suitcases and travel bags. Accordingly, various types of brake systems have been developed and applied. The cable traction brake is one of them. The operating device on the upper part of the case is connected to the brake device on the caster via a cable. By operating the operating device to operate the operating brake device by cable traction, braking and release of the caster are performed. The operating part of the operating device is directly connected to the brake cable. In such a design, high requirements are imposed on the length accuracy of the cable and the matching accuracy of the corresponding matching parts. However, in actual use, the operating device is generally arranged at the top of the case, and the caster is arranged at the bottom of the case. Therefore, the cable needs to extend and bend along the inside of the case from the caster to the operating device. Therefore, it is difficult to ensure the above-mentioned accuracy, and it is usually necessary to perform further troublesome adjustment work later. If the length of the cable in the case is inappropriate, it is likely to cause failures or inoperability of the caster brake.

Summary of the Invention

[0003] The object of the present invention is to overcome the defects of the prior art. The present invention provides a caster brake operating device for cases and bags that can reduce accuracy requirements, is easy to assemble, and can ensure a stable and highly reliable brake.

[0004] To achieve the above object, the present invention provides the following technical solutions.

[0005] It is provided with a mounting box, an operation part, a drive connection assembly, and a brake cable. The brake cable includes a cable sleeve and a slidable cable core inserted into the cable sleeve. The operation part is connected to the cable core of the brake cable via the drive connection assembly. The drive connection assembly is provided with a traction slider. The traction slider is configured to be restricted within the mounting box and reciprocally slide along the traction direction of the cable core of the brake cable. The traction slider is a brake operating device for a case and a bag caster, and a spring mounting part is provided on the traction slider. A tension spring is mounted on the spring mounting part. The other end of the tension spring opposite to the end connected to the spring mounting part is tractionably connected to the cable core of the brake cable. The tension spring and the brake cable are in one-to-one correspondence. A brake operating device for a case and a bag caster, characterized in that.

[0006] Preferably, the operation part is linearly and slidably fitted into the mounting box. The sliding direction of the operation part coincides with the sliding direction of the traction slider. A swing arm having a labor-saving lever structure mounted on the mounting box via a pivot is connected to the operation part. The swing plane where the swing arm is located is parallel to the sliding plane where the traction slider is located. The operation part is connected to the traction slider via the swing arm. The swing arm includes a first lever arm and a second lever arm respectively arranged on both sides of the pivot point. The first lever arm of the swing arm is interlockingly connected to the operation part. A toggle end is provided at one end of the second lever arm of the swing arm. The toggle end is push-fitted with the traction slider.

[0007] Preferably, the toggle end is a toggle boss protruding from the end of the second lever arm. A drive hole is provided in the traction slider. The toggle boss is inserted into the drive hole. The toggle boss is push-fitted with the wall of the drive hole. The drive hole extends laterally along the traction slider to provide a space required for the relative sliding of the toggle boss and the traction slider. It is a strip-shaped hole.

[0008] Preferably, a positioning boss that protrudes in a direction opposite to the protruding direction of the toggle boss is provided at the end of the second lever arm, and an arcuate positioning groove adapted to the positioning boss is provided in the mounting box.

[0009] Preferably, the traction slider is frame-shaped, includes a plate-shaped base, the frame plate protrudes from the edge of the plate-shaped base, the frame plate and the plate-shaped base surround a groove cavity, the drive hole is arranged on the plate-shaped base and is located within the groove cavity, the frame plate has an avoidance opening and a positioning notch, the second lever arm of the swing arm extends through the avoidance opening to the drive hole, and a positioning convex plate that is inserted into the positioning notch to form a sliding guide for the traction slider is provided on the mounting box, and a spring mounting portion is formed on the outside of the frame plate.

[0010] Preferably, the mounting box includes an assembly intermediate frame, a rear cover plate, and a front end panel. An assembly front concave cavity and an assembly rear concave cavity are respectively recessed on the front side and the rear side of the assembly intermediate frame. A partition plate is formed between the assembly front concave cavity and the assembly rear concave cavity. The rear cover plate covers the mouth of the assembly rear concave cavity. The assembly rear concave cavity includes a main groove cavity. One side of the main groove cavity is connected to a second groove cavity. The rear cover plate includes a fixed cover plate that covers the mouth of the main groove cavity and a sub-cover plate that covers the mouth of the second groove cavity and can independently open the second groove cavity. The traction slider and the swing arm are assembled in the main groove cavity and are restricted within the mounting box by the fixed cover plate. The tension spring is arranged in the second groove cavity. One end of the brake cable is inserted into the second groove cavity. The spring mounting portion of the traction slider can be inserted into the second groove cavity, so that the tension spring can be hung on or removed from the spring mounting portion in the second groove cavity. The operation portion is mounted in the assembly front concave cavity. The partition plate is provided with a hollow hole for communicating the assembly front concave cavity and the main groove cavity to provide an interlocking connection between the operation portion and the swing arm. The front end panel is fixed to the assembly intermediate frame, and a clamping mounting gap is formed between the front end panel and the end face of the mouth of the assembly front concave cavity.

[0011] Preferably, a toggle shaft head protrudes from an end of the first lever arm, a toggle groove is provided in the operation portion, the toggle shaft head is inserted into the toggle groove, the toggle shaft head and the wall of the toggle groove are press-fitted to form interlocking between the swing arm and the operation portion, and a lateral space for the toggle shaft head to move within the toggle groove when the swing arm swings is provided in the toggle groove.

[0012] Preferably, an elastic lock hook is provided on the operation portion, a lock release slider is provided in the mounting box, the lock release slider is disposed at a position at one end in the sliding direction of the operation portion, the lock release slider is slidably mounted on the mounting box, the sliding direction of the lock release slider is orthogonal to the sliding direction of the operation portion, the sliding surface where the lock release slider is located is parallel to the sliding surface where the operation portion is located, an operation end portion exposed outside the mounting box is provided on the lock release slider, and a snap engagement boss for the elastic lock hook to snap-engage with is provided, a reset spring abuts against the lock release slider, the lock release slider is driven by the reset spring to stay at a position where the snap engagement boss can snap-engage with the elastic lock hook, the lock release slider is pushed to overcome the spring force of the reset spring, and the lock release slider slides until the snap engagement boss disengages from the elastic lock hook to complete the unlocking of the operation portion.

[0013] Preferably, one end of the cable core of the brake cable is fixedly connected to a tension spring.

[0014] Preferably, a hanging ring is crimped to one end of the cable core of the brake cable, and one end of the tension spring is hung on the hanging ring.

[0015] Preferably, one end of the tension spring that is hooked to the hooking ring is provided with a straight arm extending along the axial direction of the tension spring. The end of the straight arm is bent to form an annular hooking ring. The free end of the hooking ring is close to the fixed end, and an elastically openable and closable hooking opening is formed between the free end and the fixed end of the hooking ring. The free end of the hooking ring has a guide arm that bends and extends. The guide arm and the straight arm together form an inlet connected to the hooking opening. The guide arm extends obliquely from the straight arm so that the inlet is conical.

[0016] By adopting the above technical solution, due to the sliding of the traction slider and the elastic expansion and contraction of the tension spring, the deviation of the length of the brake cable can be automatically and elastically absorbed and adjusted. Therefore, even if there is a deviation in the length of the brake cable, the caster can be reliably locked or unlocked, the accuracy requirement is reduced, and stable and highly reliable braking is guaranteed. Further, as a further technical improvement, the operation part adopts a sliding push button form, and the swing arm of the labor-saving lever structure is used to change the transmission direction. By pressing the operation part, the upward movement of the traction slider is completed, thereby pulling the tension spring. The tension spring pulls the brake cable to execute the braking operation, and the braking operation of pressing the operation part is labor-saving. At the same time, based on the tension spring, by directly hanging the cable core of the brake cable on the tension spring, the connection structure between the brake cable and the tension spring is simplified, the structure is simple and compact, and the assembly becomes more convenient. At the same time, the tension spring and the brake cable are directly connected, and since the tension spring directly pulls the brake cable without generating additional frictional resistance, the braking operation becomes lighter.

[0017] The present invention will be further described below with reference to the accompanying drawings.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

[0019] Refer to FIGS. 1 to 6. The casters brake operating device for cases and bags disclosed in the present invention includes a mounting box 1, an operating portion 2, a drive connection assembly, and a brake cable 3. The mounting box 1 is fixed to the box body 9. The brake cable 3 includes a cable sleeve 31 and a slidable cable core 32 inserted into the cable sleeve 31. The cable core 32 is usually made of a steel wire rope. The operating portion 2 is connected to the cable core 32 of the brake cable 3 via the drive connection assembly. The drive connection assembly includes a traction slider 4, and the traction slider 4 is configured to be restricted within the mounting box 1 and reciprocally slide along the traction direction of the cable core 32 of the brake cable (the direction of the X axis shown in FIGS. 1 to 3). The traction slider 4 is connected to the operating portion 2, operates the operating portion 2, and further drives the traction slider 4 to pull the cable core 32 of the brake cable 3. In a conventional casters brake operating device, when the traction slider 4 is directly connected to the cable core 32 of the brake cable 3, the requirement for the length accuracy of the cable core 32 is high, and problems with the reliability of the brake are likely to occur due to the mismatch in the length of the cable core 32. Here, the following optimization design is carried out. A spring mounting portion 41 is provided on the traction slider 4, a tension spring 5 is attached to the spring mounting portion 41, and the other end of the tension spring 5 opposite to the end connected to the spring mounting portion 41 is tractionably connected to the cable core 32 of the brake cable 3, and the tension spring 5 and the brake cable 3 correspond one-to-one. In this way, the traction of the traction slider 4 to the brake cable 3 is achieved via the tension spring 5, and the elastic expansion and contraction of the tension spring 5 can elastically absorb and adjust the length deviation of the brake cable 3, ensuring the reliability of the casters brake. In one casters brake system, in order to realize the braking of two casters, usually two brake cables are equipped, so two spring mounting portions are arranged on the traction slider.

[0020] Here, regarding the traction connection between the tension spring 5 and the cable core 32 of the brake cable 3, the tension spring 5 can be connected to a slidable connection slider installed in the mounting box 1, and the cable core 32 of the brake cable 3 can be fixed to the connection slider. In this way, engagement fixation can be performed using the fixed end of the cable core of the conventional brake cable. However, a problem occurs in that a connection slider is introduced between the tension spring 5 and the brake cable 3, and frictional resistance is generated due to the sliding of the connection slider. This frictional resistance is transmitted to the operating portion 2, increasing the force required to operate the operating portion 2 and making the feel of the brake operation heavy. Therefore, the fixed structure of the conventional brake cable is changed, and one end of the cable core 32 of the brake cable 3 is fixed and connected to the tension spring 5. That is, by directly pulling the cable core 32 by the tension spring 5, the structure is simplified, no extra friction occurs, and the feel of the brake operation becomes light. More specifically, as a simple and convenient assembly structure, as shown in FIGS. 1, 3, 5, and 6, a hanging ring 33 is crimped to one end of the cable core 32 of the brake cable 3. The hanging ring 33 has a crimping portion fixed to the wire core 32, and an annular portion is formed in the crimping portion. A structure is provided in which one end of the tension spring 5 is hung on the hanging ring 33. As a conventional spring hanging structure, one end of the tension spring is bent into a hook shape and the tension spring is hooked on the annular portion. In this embodiment, by adopting the above design, the tension spring and the brake cable can be disassembled and assembled, disassembled during transportation, assembled during use, the assembly operation is simple and convenient, and transportation and packaging are facilitated. Of course, under the guidance of the present invention, in combination with the prior art, those skilled in the art can also consider other solutions for the fixed connection between the cable core and the tension spring, such as the use of a rivet sleeve. The rivet sleeve is sleeved on the cable core and the straight arm of the tension spring respectively, and then the rivet sleeve is riveted and fixed to achieve the fixed connection between the spring and the brake cable.Alternatively, one end of the tension spring is a hook or a ring, the end of the cable core is bent in the opposite direction, and is fixed by a rivet sleeve to form a rope ring, and the rope ring is hooked on the hook or ring of the tension spring, so as to achieve a fixed connection between the cable core and the tension spring. Alternatively, direct welding and fixing of the tension spring and the wire core may be adopted.

[0021] To achieve a convenient and reliable hooking and fixing of the tension spring, the following optimized design may be adopted. As shown in FIGS. 7 and 8, one end of the tension spring 5 that is hooked on the hooking ring 33 is provided with a straight arm 51 extending along the axial direction of the tension spring 5. The end of the straight arm 51 is bent to form an annular hooking ring 52. The free end 521 of the hooking ring 52 is close to the fixed end 522. An elastically openable and closable hanging opening 520 is formed between the free end 521 and the fixed end 522 of the hooking ring 52. The free end 521 of the hooking ring 52 has a guide arm 53 that bends and extends. The guide arm 53 and the straight arm 51 together form an inlet 54 connected to the hanging opening 520. The guide arm 53 extends obliquely from the straight arm 51 such that the inlet 54 is conical. With the above-described hooking structure design of the tension spring, the inlet 54 realizes a hooking guide, which is convenient for hooking on the elastic opening of the hanging opening 520, and has the advantage that the hooking operation is convenient. After the tension spring is hooked on the hooking ring, by converging the hanging opening, the tension spring and the hooking ring are not easily detached, and the tension spring is firmly and reliably hooked. The other end of the tension spring 5 can be optimally designed by adopting a plurality of connecting rings 55 that are spirally overlapped and extended.

[0022] As an embodiment of the present invention, the operation unit 2 is linearly slidably fitted into the mounting box 1, and the sliding direction of the operation unit 2 coincides with the sliding direction of the traction slider 4. This coincidence, referring to FIGS. 2 and 3, as shown in the figures, the sliding direction of the operation unit 2 is also the X-axis direction. A swing arm 6 having a labor-saving lever structure attached to the mounting box 1 via a pivot 6-1 is connected to the operation unit 2, and the operation unit 2 is connected to the traction slider 4 via the swing arm 6. The swing arm 6 includes a first lever arm 61 and a second lever arm 62 respectively arranged on both sides of the pivot point. The first lever arm 61 of the swing arm 6 is linked and connected to the operation unit 2. One end of the second lever arm 62 of the swing arm 6 is provided with a toggle end 621, and the toggle end 621 is push-fitted with the traction slider 4. Thereby, the operation unit drives the traction slider 4 to slide via the swing arm 6 of the labor-saving lever structure. The overall structure is simple and compact. On the one hand, it realizes the change of the transmission direction between the operation unit 2 and the traction slider 4, realizes the operation of pushing the operation unit 2 to pull the traction slider 4, and the pressing operation becomes more labor-saving and convenient. On the other hand, the swing arm 6 of the labor-saving lever structure can reduce the force required to drive the traction slider 4 to pull the tension spring 5 to perform the braking operation, and the feel of the brake becomes lighter. The swing plane where the swing arm 6 is located is parallel to the sliding plane where the traction slider 4 is located, realizing a more compact and reliable arrangement of the traction slider, swing arm, and operation unit. Therefore, although the swing plane where the swing arm 6 is located and the sliding plane where the traction slider 4 is located can be arranged vertically, in this form, the thickness (space in the Y-axis direction) of the entire caster brake operating device for cases and bags becomes large, and the overall structure is not compact. Under the guidance of the present invention, those skilled in the art can also create other embodiments of the present invention not shown in the attached drawings. For example, the operation unit can be designed to push and lift the traction slider and pull the brake cable to complete the braking operation, and the operation unit may be directly fixedly connected to the traction slider.Alternatively, the operating part slides in a direction perpendicular to the sliding direction of the traction slider, and a push-fit slope is provided on the operating part. The push-fit slope pushes the traction slider to pull the brake cable to complete the braking. Alternatively, the operating part is a knob, and a cam is designed on the knob. The protrusion pushes and slides the traction slider to pull the brake cable to complete the braking. Alternatively, the operating part and the traction slider may be transmitted using a gear-rack structure or the like. However, in the design of the present embodiment shown in FIGS. 1 to 6, there are advantages such as a simple and compact structure, stable and highly reliable operation, and a light touch operation feeling. In order for the swing arm to reliably press the traction slider, it is conceivable to make the part of the traction slider that mates with the toggle end correspond to the position of the spring mounting part. Thereby, the pulling force of the tension spring on the traction slider and the pressing force of the swing arm on the traction slider are maintained on the same axis as much as possible.

[0023] Furthermore, the toggle end 621 is a toggle boss protruding from the end of the second lever arm 62. A drive hole 42 is provided in the traction slider 4, and the toggle boss is inserted into the drive hole 42. The toggle boss is push-fitted with the wall of the drive hole 42, and the drive hole 42 is a strip-shaped hole that extends laterally along the traction slider 4 to provide the space necessary for the toggle boss and the traction slider 4 to slide relative to each other. In this design, a push fit is realized using a hole and a toggle boss inserted in a convex shape. The structures of both are simple and highly reliable, and their combination enhances the stability and reliability. The drive hole 42 is a strip-shaped hole designed so that when the swing arm swings, the swing arm can adapt to the relative lateral displacement of the boss and the traction slider of the traction slider.

[0024] Similarly, the matching between the first lever arm 61 and the operating part 2 can also adopt a convex plug structure. A toggle shaft head 611 protrudes from the end of the first lever arm 61, and a toggle groove 21 is provided in the operating part 2. The toggle shaft head 611 is inserted into the toggle groove 21, and the toggle shaft head 611 and the wall of the toggle groove 21 are push-fitted to form the interlocking between the swing arm 6 and the operating part 2. The toggle groove 21 is provided with a lateral space for the toggle shaft head 611 to move within the toggle groove 21 when the swing arm 61 swings.

[0025] To further ensure the stability and reliability of the swing arm 6, a positioning boss 622 protruding in the direction opposite to the protruding direction of the toggle boss is provided at the end of the second lever arm 62 of the swing arm, and an arc-shaped positioning groove 11 adapted to the positioning boss 622 is provided in the mounting box 1. Similarly, a positioning boss may be provided at the end of the first lever arm 61 of the swing arm, and an arc-shaped positioning groove adapted to the positioning boss may be provided in the mounting box.

[0026] To achieve a more compact structural design, facilitate assembly, and ensure stable and highly reliable operation, the following optimized design is adopted. The traction slider 4 is frame-shaped, the traction slider 4 includes a plate-shaped base 43, a frame plate 44 protrudes from the edge of the plate-shaped base 43, the frame plate 44 and the plate-shaped base 43 enclose a groove cavity 40, the drive hole 42 is arranged on the plate-shaped base 43 and is located within the groove cavity 40, the frame plate 44 has an avoidance opening 441 and a positioning notch 442, the second lever arm 62 of the swing arm 6 extends through the avoidance opening 441 to the drive hole 42, and the groove cavity 40 of the frame-shaped traction slider 4 ensures a space for arranging the swing arm, realizing a compact design. At the same time, the frame plate adopts a straight-line design on both sides perpendicular to the sliding direction of the traction slider, forming a positioning space within the mounting box through two positioning walls, and the traction slider is arranged within the positioning space. The straight-line part of the frame plate 44 together with the positioning wall realizes a positioning guide. In addition, the mounting box 1 is provided with a positioning convex plate 112 inserted into the positioning groove 442 to guide the sliding of the traction slider 4, and a spring mounting part 41 is formed on the outside of the frame plate 44.

[0027] As an embodiment of the present invention, the mounting box 1 includes an assembly intermediate frame 11, a rear cover plate 12, and a front panel 13. An anterior assembly concave cavity and a posterior assembly concave cavity are respectively recessed on the front side and the rear side of the assembly intermediate frame 11. A partition plate is formed between the anterior assembly concave cavity and the posterior assembly concave cavity. The rear cover plate 12 covers the mouth of the posterior assembly concave cavity. The posterior assembly concave cavity includes a main groove cavity 113. One side of the main groove cavity 113 is connected to a second groove cavity 114. The rear cover plate 12 includes a fixed cover plate 121 that covers the mouth of the main groove cavity 113, and a sub-cover plate 122 that covers the mouth of the second groove cavity 114 and can independently open the second groove cavity. The traction slider 4 and the swing arm 6 are assembled in the main groove cavity 113 and are restricted within the mounting box 1 by the fixed cover plate 121. The fixed cover plate 121 can be fixed by a reliable method such as screws. The tension spring 5 is disposed in the second groove cavity 114. One end of the brake cable 3 is inserted into the second groove cavity 114. The spring mounting portion 41 of the traction slider 4 can be inserted into the second groove cavity 114, so that the tension spring 5 can be hooked or removed from the spring mounting portion in the second groove cavity 114. The operation part 2 is mounted in the front assembly cavity. As a simple and feasible method, two opposing barb feet are provided on the operation part 2, and a strip-shaped engagement hole is provided at the bottom of the anterior assembly concave cavity. The barb feet are fixed to the engagement hole to restrict the operation part within the anterior assembly concave cavity. The feet of the barb feet can slide along the engagement hole. A hollow hole 115 communicating the anterior assembly concave cavity and the main groove cavity is provided in the partition plate to provide an interlocking connection between the operation part 2 and the swing arm 6. The front panel 13 is fixed to the assembly intermediate frame 11. A clamping mounting interval is formed between the front panel 13 and the end face of the mouth of the anterior assembly concave cavity. The front panel 13 is fixed to the box body through the clamping mounting interval (see FIG. 1).In this way, the tension spring and the spring mounting part can be separated at an early stage, that is, the operation box part of the brake operating device, the tension spring, and the brake cable can be packaged separately, and later the sub-cover plate can be opened (see Fig. 5) to perform the assembly operation, which has the advantage of facilitating transportation and assembly. (Of course, in the case of a non-removable fixed connection between the tension spring and the brake cable, the tension spring and the brake cable can be packaged together. In the case of a removable fixed connection form between the tension spring and the brake cable, the tension spring can also be held in the second groove cavity of the mounting box). Also, in the structural design of the mounting box, there is the advantage that the overall assembly operation is simple and convenient.

[0028] To ensure that the caster reliably maintains the braking state, the operation part is usually equipped with an independent locking and unlocking structure for realizing the maintenance of the braking state of the caster and the reset to the non-braking state, as shown in FIGS. 1, 2, and 4. As an embodiment of the present invention, an elastic locking hook 22 is provided on the operation part 2, a lock release slider 7 is provided on the mounting box 1, the lock release slider 7 is arranged at one end position in the sliding direction of the operation part 2, the lock release slider 7 is slidably mounted on the mounting box 1, the sliding direction of the lock release slider 7 is perpendicular to the sliding direction of the operation part 2, the sliding surface where the lock release slider 7 is located is parallel to the sliding surface where the operation part 2 is located, an operation end exposed outside the mounting box 1 is provided on the lock release slider 7, and a snap engagement boss 71 for snap engagement with the elastic locking hook 22 is provided. A reset spring 8 abuts against the lock release slider 7. The lock release slider 7 is driven by the reset spring 8 to stay at a position where the snap engagement boss 71 can be snap engaged with the elastic locking hook 22. Push the lock release slider 7 to overcome the spring force of the reset spring 8, and slide the lock release slider 7 until the snap engagement boss 71 disengages from the elastic locking hook 22 to complete the unlocking of the operation part. When the lock release slider is driven by the return spring, the snap engagement boss of the lock release slider presses the operation part during the movement stroke of the elastic locking hook, reaches the traction brake cable through the swing arm and the traction slider, and completes the caster brake. When the operation part enters the braking position corresponding to the caster brake, the elastic locking hook snaps engages with the snap engagement boss, the operation part is held at the braking position, and the caster is in the braking state. When the lock release slider is toggled horizontally, the lock release slider overcomes the elastic holding force of the reset spring, the snap engagement boss disengages from the elastic locking hook, the force of the traction spring of the brake cable is transmitted to the operation part, and the operation part is reset to the non-braking state.

Explanation of Reference Numerals

[0029] 1 Mounting box 11 Assembly intermediate frame 111 Arc-shaped positioning groove 112 Positioning convex plate 113 Main groove cavity 114 Second groove cavity 115 Hollow hole 12 Rear cover plate 13 Front panel 2 Operating part 21 Toggle groove 22 Elastic locking hook 3 Brake cable 31 Cable sleeve 32 Cable core 33 Hanging ring 4 Traction slider 40 Groove cavity 41 Spring mounting part 42 Driving hole 43 Plate base 44 Frame plate 441 Avoidance opening 442 Positioning notch 5 Tension spring 51 Straight arm 52 Hanging ring 520 Hanging opening 521 Free end 522 Fixed end 53 Guide arm 54 Inlet 55 Connecting ring 6 Rocking arm 61 First lever arm 611 Toggle shaft head 62 Second lever arm 621 Toggle end 621 622 Positioning boss 6-1 Pivot 7 Lock release slider 71 Snap engagement boss 8 Reset spring, and 9 Box body.

Claims

1. 1. A brake operating device for casters for cases and bags, comprising a mounting box, an operating unit, a drive connection assembly, and a brake cable, the brake cable comprising a cable sleeve and a slidable cable core inserted into the cable sleeve, the operating unit being connected to the cable core of the brake cable via the drive connection assembly, the drive connection assembly comprising a traction slider, the traction slider being restricted within the mounting box and configured to slide back and forth along the traction direction of the cable core of the brake cable, the traction slider being connected to the operating unit, wherein the traction slider is provided with a spring mounting unit, a tension spring is attached to the spring mounting unit, the other end of the tension spring opposite to the one end connected to the spring mounting unit is tractively connected to the cable core of the brake cable, and the tension spring and the brake cable have a one-to-one correspondence.

2. 2. The brake operating device for casters for cases and bags as described in claim 1, characterized in that: the operating part is attached to the mounting box so as to be slidable in a linear manner, the sliding direction of the operating part coincides with the sliding direction of the towing slider, a swing arm having a labor-saving lever structure attached to the mounting box via a pivot is connected to the operating part, a swing surface on which the swing arm is located is parallel to the sliding surface on which the towing slider is located, the operating part is connected to the towing slider via the swing arm, the swing arm includes a first lever arm and a second lever arm respectively arranged on both sides of a pivot point, the first lever arm of the swing arm is operatively connected to the operating part, and a toggle end is provided at one end of the second lever arm of the swing arm, the toggle end being push-fitted with the towing slider.

3. 3. The brake operating device for casters for cases and bags according to claim 2, characterized in that the toggle end is a toggle boss protruding from the end of the second lever arm, the towing slider is provided with a drive hole, the toggle boss is inserted into the drive hole, the toggle boss is push-fitted with the wall of the drive hole, and the drive hole is a strip-shaped hole extending laterally along the towing slider to provide the space required for the toggle boss and the towing slider to slide relative to each other.

4. 4. The brake operating device for casters for cases and bags as described in claim 3, characterized in that a positioning boss is provided at the end of the second lever arm, protruding in a direction opposite to the protruding direction of the toggle boss, and an arc-shaped positioning groove that fits the positioning boss is provided on the mounting box.

5. 4. The brake operating device of the caster for cases and bags according to claim 3, characterized in that the towing slider is frame-shaped and includes a plate-shaped base, the frame plate protrudes from the edge of the plate-shaped base, the frame plate and the plate-shaped base surround a groove cavity, the driving hole is disposed on the plate-shaped base and located in the groove cavity, the frame plate has an avoidance opening and a positioning notch, the second lever arm of the swing arm extends through the avoidance opening to the driving hole, a positioning protrusion plate is provided on the mounting box, which is inserted into the positioning notch to form a sliding guide for the towing slider, and a spring mounting portion is formed on the outside of the frame plate.

6. The mounting box includes an assembly intermediate frame, a rear cover plate, and a front end panel, a front assembly concave cavity and a rear assembly concave cavity are respectively concaved on the front side and the rear side of the assembly intermediate frame, a partition plate is formed between the front assembly concave cavity and the rear assembly concave cavity, the rear cover plate covers the mouth of the rear assembly concave cavity, the rear assembly concave cavity includes a main groove cavity, one side of the main groove cavity is connected to a second groove cavity, the rear cover plate includes a fixed cover plate covering the mouth of the main groove cavity and a sub-cover plate covering the mouth of the second groove cavity and capable of independently opening the second groove cavity, the traction slider and the swing arm are assembled in the main groove cavity and are restricted in the mounting box by the fixed cover plate, and the traction slider and the swing arm are assembled in the main groove cavity and are restricted in the mounting box by the fixed cover plate, and the traction slider and the swing arm are assembled in the main groove cavity and are restricted in the mounting box by the fixed cover plate, and the traction slider and the swing arm are assembled in the main groove cavity and are restricted in the mounting box by the fixed cover plate, and the traction slider and the swing arm are mounted ...

6. The brake operating device of the caster for cases and bags according to claim 5, characterized in that: the tension spring is disposed in the second groove cavity, one end of the brake cable is inserted into the second groove cavity, the spring mounting part of the traction slider can be inserted into the second groove cavity so that the tension spring can be hooked and detached from the spring mounting part in the second groove cavity; the operating part is mounted in the front assembly concave cavity, the partition plate is provided with a hollow hole for communicating the front assembly concave cavity and the main groove cavity to provide an interlocking connection between the operating part and the swing arm; the front end panel is fixed to the assembly intermediate frame, and a clamping mounting gap is formed between the front end panel and the mouth end face of the front assembly concave cavity.

7. 3. A brake operating device for casters for cases and bags as described in claim 2, characterized in that a toggle shaft head protrudes from the end of the first lever arm, a toggle groove is provided in the operating portion, the toggle shaft head is inserted into the toggle groove, and the toggle shaft head and a wall of the toggle groove are push-fitted together to form an interlocking between the swing arm and the operating portion, and the toggle groove is provided with a lateral space for the toggle shaft head to move within the toggle groove when the swing arm swings.

8. 3. The brake operating device for casters for cases and bags according to claim 2, characterized in that the operating part is provided with an elastic lock hook, the mounting box is provided with an unlocking slider, the unlocking slider is arranged at one end position of the operating part in the sliding direction, the unlocking slider is slidably attached to the mounting box, the sliding direction of the unlocking slider is perpendicular to the sliding direction of the operating part, the sliding surface on which the unlocking slider is located is parallel to the sliding surface on which the operating part is located, the unlocking slider is provided with a snap engagement boss for snap engagement between the operating end exposed to the outside of the mounting box and the elastic lock hook, a reset spring abuts against the unlocking slider, the unlocking slider is driven by the reset spring to remain in a position where the snap engagement boss can snap engage with the elastic lock hook, the reset spring pushes the unlocking slider to overcome the spring force of the reset spring, and the unlocking slider slides until the snap engagement boss is released from the elastic lock hook, completing the unlocking of the operating part.

9. 2. The brake operating device for casters for cases and bags according to claim 1, wherein one end of a cable core of the brake cable is fixedly connected to a tension spring.

10. 10. The brake operating device for a caster for cases and bags according to claim 9, wherein a hook ring is crimped to one end of a cable core of the brake cable, and one end of a tension spring is hooked on the hook ring.

11. 11. The brake operating device for casters for cases and bags as described in claim 10, wherein one end of the tension spring that is hooked onto the hook ring is provided with a straight arm extending along the axial direction of the tension spring, an end of the straight arm is bent to form an annular hook ring, a free end of the hook ring is adjacent to a fixed end, and a hook opening that can be elastically opened and closed is formed between the free end and the fixed end of the hook ring, the free end of the hook ring has a guide arm that bends and extends, the guide arm and the straight arm together form an introduction opening that is connected to the hook opening, and the guide arm extends obliquely from the straight arm so that the introduction opening is conical.

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