Brake device and cart

Abstract

The application discloses a brake device and a cart with the brake device, wherein the brake device comprises a shell, a roller assembly, a driving assembly and a brake assembly. A rotating shaft is arranged in the center of the shell; the roller assembly comprises a hub, and a plurality of limiting holes are arranged on the end face of the hub close to the shell; the driving assembly comprises a rotatable driving member; the brake assembly comprises a movable limiting pin, the second end of the limiting pin is inserted into the limiting hole, the first end of the limiting pin can abut against the driving member, the driving member is driven to rotate to drive the first end of the limiting pin to make the second end of the limiting pin inserted into the limiting hole, and the limiting pin is used for locking or unlocking the hub. The driving member is rotated, the second end of the limiting pin is inserted into the limiting hole, the rotation of the hub is limited through the limiting pin inserted into the hub, and the brake purpose is finally achieved.

Description

Technical Field

[0001] This invention relates to the technical field of children's products, and in particular to a braking device and a stroller. Background Technology

[0002] Many child vehicles are equipped with wheels and brakes to enable braking and positioning. Brakes are particularly important for strollers, as they are often used outdoors and require stopping and fixing in a specific location, or pausing or slowing down before quickly resuming movement. Therefore, the braking system is crucial for ensuring both ease of operation and the safety of the child riding in the stroller.

[0003] Existing strollers typically use a brake lever that engages with a brake groove on the wheel to achieve braking. However, this method poses a safety hazard as the brake lever may pop out of the groove. Therefore, it is necessary to provide a convenient and safe braking device to ensure the safety of strollers. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a braking device capable of locking the wheels of a cart.

[0005] The present invention also proposes a trolley having the above-mentioned braking device.

[0006] According to a first aspect of the present invention, the braking device comprises:

[0007] The outer casing has a rotating shaft passing through its center;

[0008] A roller assembly is disposed at one end of the housing. The roller assembly includes a hub, and a plurality of limiting holes are provided on the end face of the hub near the end of the housing. The hub is coaxially arranged with the rotating shaft.

[0009] A drive assembly, disposed at the other end of the housing, the drive assembly including a rotatable drive member coaxially arranged with the hub; and

[0010] A brake assembly is eccentrically disposed within the housing and located on one side of the rotating shaft. The brake assembly includes a movable limiting pin, which is coaxially disposed with the limiting hole. The second end of the limiting pin is inserted into the limiting hole, and the first end of the limiting pin can abut against the driving member, driving the driving member to rotate so that the first end of the limiting pin is driven so that the second end of the limiting pin is inserted into the limiting hole. The limiting pin is used to lock or unlock the wheel hub.

[0011] The braking device according to embodiments of the present invention has at least the following beneficial effects: Rotating the driving member causes its inner side to abut against the first end of the limiting pin, thereby causing the second end of the limiting pin to pass through the limiting hole. This, in turn, locks the wheel hub in place by the second end of the limiting pin, thus restricting the rotation of the wheel hub and ultimately achieving braking. Furthermore, locking the limiting pin or the driving member can prevent the limiting pin from disengaging from the limiting hole, thereby ensuring stable braking without any safety hazards.

[0012] According to some embodiments of the present invention, the driving member is rotatably disposed at one end of the housing, and a driving inclined surface is provided on the inner side of the driving member. The driving inclined surface can be arranged around one side of the rotating shaft, and the inclined surface of the driving inclined surface can abut against the first end of the limiting pin. The driving member is rotated so that the driving inclined surface continuously pushes the first end of the limiting pin.

[0013] According to some embodiments of the present invention, the inner side of the driving member is further provided with a first limiting groove and a second limiting groove, the first limiting groove and the second limiting groove being connected, and both the first limiting groove and the second limiting groove being arc-shaped with the rotating shaft as the rotation center; the driving assembly further includes:

[0014] A first reset elastic element is disposed in the first limiting groove, and one end of the first reset elastic element abuts against one end of the first limiting groove; and

[0015] A reset limiting piece is disposed at one end of the housing and located in the second limiting groove. One end of the reset limiting piece abuts against one end of the second limiting groove, and the other end of the first reset elastic member abuts against the other end of the reset limiting piece.

[0016] According to some embodiments of the present invention, the brake assembly further includes a first sleeve that can be inserted into the housing, a second end of the first sleeve abutting against the housing, a first end of the first sleeve being flush with one end of the housing, the length direction of the first sleeve being parallel to the direction of the rotation axis, and a limiting pin that can be movably inserted into the first sleeve, the two ends of the limiting pin being extendable at the two ends of the first sleeve.

[0017] According to some embodiments of the present invention, the brake assembly further includes a second reset elastic member, a first drive tooth is provided inside the first end of the first sleeve, the first drive tooth is directed toward the second end of the first sleeve, and the limiting pin includes:

[0018] The pressing block is slidably disposed in the first end of the first sleeve. The first end of the pressing block is the first end of the limiting pin. The second end of the pressing block is provided with a plurality of first sliding grooves on its periphery. The first sliding grooves are evenly distributed on the periphery of the pressing block. The end of the second end of the pressing block is provided with a second driving tooth, which faces the second end of the first sleeve.

[0019] A transmission block, rotatably disposed within the first sleeve, has a first end abutting against one end of the pressing block. A third driving tooth is provided on the outer periphery of the transmission block, facing the first end of the first sleeve. The tooth surface of the third driving tooth can abut against the tooth surfaces of both the first and second driving teeth.

[0020] A limiting block is provided in the second end of the first sleeve. The first end of the limiting block abuts against the second end of the transmission block. The second end of the limiting block is the second end of the limiting pin. The second reset elastic member is sleeved on the outside of the second end of the limiting block. One end of the second reset elastic member abuts against the first end of the limiting block, and the other end of the second reset elastic member abuts against the end of the wheel hub.

[0021] According to some embodiments of the present invention, a plurality of slide rails are provided at one end of the inner side of the first sleeve, the plurality of slide rails are evenly spaced and distributed on the inner side of the first sleeve, a first drive tooth is provided at one end of the slide rail, the slide rail can slide in the first slide groove, the tooth surface of the first drive tooth can abut against the tooth surface of the third drive tooth, and the tooth surface of the third drive tooth can slide on the tooth surface of the first drive tooth.

[0022] The outer periphery of the transmission block is provided with a plurality of second sliding grooves, which are evenly distributed on the periphery of the transmission block. The slide rail can slide in the second sliding grooves. The third driving tooth is provided between adjacent second sliding grooves. The tooth surface of the third driving tooth can abut against the tooth surface of the second driving tooth, and the tooth surface of the third driving tooth can slide on the tooth surface of the second driving tooth.

[0023] According to some embodiments of the present invention, a first shaft is provided at the end of the first end of the transmission block, the first shaft being rotatably inserted into the second end of the pressing block, and a second shaft is provided at the end of the first end of the limiting block, the second shaft being inserted into the second end of the transmission block.

[0024] According to some embodiments of the present invention, the limiting block includes:

[0025] A second sleeve, which is the first end of the limiting block, and a third reset elastic element is provided inside the second sleeve; and

[0026] A locking pin is provided, with its first end passing through the second sleeve, one end of the third reset elastic member abutting the interior of the second sleeve, and the other end of the third reset elastic member abutting the end of the first end of the locking pin, and the second end of the locking pin being able to be inserted into the limiting hole.

[0027] According to some embodiments of the present invention, a first groove is provided on the periphery of the second sleeve, and a first buckle is provided at the end of the first end of the locking pin, the first buckle being slidably disposed in the first groove.

[0028] According to some embodiments of the present invention, a second slot is provided at the second end of the first sleeve, a second buckle is provided on the outer side of the first end of the limiting block, the second buckle is slidably disposed in the second slot, a warning sign is provided on the outer side of the second buckle, and a viewing window is provided on the outer shell, the position of the viewing window corresponding to the position of the warning sign.

[0029] According to some embodiments of the present invention, a third buckle is further provided on the outer side of the first sleeve, and a third slot is further provided in the outer shell, wherein the third buckle is engaged in the third slot.

[0030] According to a second aspect of the present invention, a trolley includes the braking device described in any of the embodiments of the first aspect above. The trolley also includes wheel brackets. The braking device is provided in two sets. The two ends of the wheel brackets are respectively movably connected to the drive assembly, the roller assembly and the brake assembly through the housing.

[0031] The trolley according to the present invention has at least the following advantages: by setting the braking device at both ends of the trolley, the roller assemblies on both sides of the trolley can be braked by the braking assembly, thereby ensuring safe and stable braking of the trolley.

[0032] According to some embodiments of the present invention, at least one of the driving members at both ends of the wheel bracket is provided with a pedal portion, and the driving member is driven to rotate by the pedal portion.

[0033] According to some embodiments of the present invention, the trolley further includes a traction member, which can be inserted into the wheel bracket, and both ends of the traction member are respectively connected to the driving member to drive the driving member to rotate so as to drive the other driving member to rotate.

[0034] According to some embodiments of the present invention, the drive member has an internal mounting portion, which respectively fixes the two ends of the traction member.

[0035] According to some embodiments of the present invention, a quick-release assembly is further included, which is disposed in the housing and connected to the roller assembly via the pivot. The quick-release assembly is used to install or remove the roller assembly by locking or unlocking the pivot.

[0036] According to some embodiments of the present invention, a first end of the rotating shaft is connected to the roller assembly, a second end of the rotating shaft is inserted into the housing, the second end of the rotating shaft includes a insertion section and a locking section, the insertion section and the locking section are fixedly connected, the diameter of the insertion section is larger than the diameter of the locking section, and the quick-release assembly includes:

[0037] A locking plate is slidably disposed in the housing. A locking segment can pass through a lock hole at one end of the locking plate. The diameter of the lock hole is larger than the diameter of the insertion segment. The lock hole has a locking part that can abut against the insertion segment.

[0038] According to some embodiments of the present invention, the quick-release assembly further includes:

[0039] A drive unit, slidably disposed within the housing and connected to the other end of the locking piece, wherein pressing the drive unit drives the locking piece to slide within the housing; and

[0040] A fourth reset elastic element is disposed in the receiving groove of the locking piece, one end of the fourth reset elastic element abuts against the inside of the outer shell, and the other end of the fourth reset elastic element abuts against the driving part.

[0041] According to some embodiments of the present invention, the quick-release assembly further includes a limiting rod, which is disposed in the locking plate and passes through the oblong hole of the locking plate. The oblong hole extends along the sliding direction of the locking plate, one end of the oblong hole can communicate with the receiving groove, and the rod portion of the limiting rod can abut against the upper end of the oblong hole.

[0042] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0043] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0044] Figure 1 This is a schematic diagram of the braking device according to an embodiment of the present invention;

[0045] Figure 2 for Figure 1The diagram shown is an explosion illustration of the braking device;

[0046] Figure 3 for Figure 2 An explosion diagram of the braking device from another perspective;

[0047] Figure 4 for Figure 3 A schematic diagram of the driver component of the drive assembly is shown;

[0048] Figure 5 for Figure 2 A schematic diagram of the housing of the braking device is shown;

[0049] Figure 6 for Figure 5 The diagram shows the internal structure of the brake assembly;

[0050] Figure 7 for Figure 1 A cross-sectional view of the braking device is shown;

[0051] Figure 8 for Figure 5 A schematic diagram of one end of the outer casing is shown;

[0052] Figure 9 for Figure 8 A cross-sectional view of BB is shown;

[0053] Figure 10 for Figure 7 A schematic diagram of the brake assembly of the braking device is shown;

[0054] Figure 11 for Figure 10 A partial structural schematic diagram of the brake assembly is shown (the first sleeve is omitted in the figure);

[0055] Figure 12 for Figure 10 The diagram shown is an exploded view of the brake assembly.

[0056] Figure 13 for Figure 12 A partial cross-sectional view of the first sleeve of the brake assembly is shown;

[0057] Figure 14 This is a partial structural schematic diagram of the trolley according to a second aspect embodiment of the present invention;

[0058] Figure 15 for Figure 14 The diagram shows the quick-release assembly of the trolley;

[0059] Figure 16 for Figure 15 An enlarged structural schematic diagram of the quick-release assembly is shown;

[0060] Figure 17 for Figure 16 A schematic diagram of the quick-release assembly is shown.

[0061] Figure label:

[0062] 10 housing; 11 hinge; 111 plug-in section; 112 locking section; 12 viewing window;

[0063] Roller assembly 20; hub 21; limiting hole 211;

[0064] Drive assembly 30; drive component 31; drive inclined surface 311; first limiting groove 312; second limiting groove 313; pedal part 314; mounting part 315; first reset elastic element 32; reset limiting piece 33;

[0065] Brake assembly 40; limiting pin 41; pressing block 411; first slide groove 4111; second drive gear 4112; transmission block 412; third drive gear 4121; second slide groove 4122; first shaft 4123; limiting block 413; second shaft 4131; second sleeve 4132; third reset elastic element 4132a; first slot 4132b; locking pin 4133; first buckle 4133a; second buckle 4134; first sleeve 42; first drive gear 421; slide rail 422; second slot 423; third buckle 424; second reset elastic element 43;

[0066] Wheel bracket 50; buffer component 51;

[0067] Quick-release assembly 60; locking plate 61; locking part 611; lock hole 612; receiving groove 613; oblong hole 614; driving part 62; fourth reset elastic element 63; limit rod 64. Detailed Implementation

[0068] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0069] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0070] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0071] In the description of this invention, unless otherwise explicitly defined, terms such as "setting," "installing," and "connecting" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0072] Reference Figures 1 to 3 According to a first aspect of the present invention, the braking device includes a housing 10, a roller assembly 20, a drive assembly 30, and a braking assembly 40. A rotating shaft 11 is inserted through the center of the outer casing 10; a roller assembly 20 is disposed at one end of the outer casing 10, the roller assembly 20 includes a hub 21, and a plurality of limiting holes 211 are provided on the end face of the hub 21 near the end of the outer casing 10, the hub 21 and the rotating shaft 11 are coaxially disposed; a drive assembly 30 is disposed at the other end of the outer casing 10, the drive assembly 30 includes a rotatable drive member 31, the drive member 31 and the hub 21 are coaxially disposed; a brake assembly 40 is eccentrically disposed in the outer casing 10 and located on one side of the rotating shaft 11, the brake assembly 40 includes a movable limiting pin 41, the limiting pin 41 and the limiting hole 211 are coaxially disposed, the second end of the limiting pin 41 is inserted into the limiting hole 211, the first end of the limiting pin 41 can abut against the drive member 31, the drive member 31 is driven to rotate to drive the first end of the limiting pin 41 so that the second end of the limiting pin 41 is inserted into the limiting hole 211, the limiting pin 41 is used to lock or unlock the hub 21.

[0073] Specifically, a rotating shaft 11 is located at the center of the outer casing 10, and one end of the rotating shaft 11 is connected to the hub 21 of the roller assembly 20, thus being rotatably exposed at one end of the outer casing 10. The hub 21 has multiple limiting holes 211, which are arranged around the rotating shaft 11. The brake assembly 40 is eccentrically mounted on the outer casing 10, and its limiting pin 41 is coaxially arranged with the limiting hole 211. Therefore, the movable limiting pin 41 can move back and forth through the limiting hole 211 to limit the movement of the hub 21, i.e., to brake. A drive assembly 30 is rotatably mounted at the other end of the outer casing 10. The drive component 31 of the drive assembly 30 is coaxially mounted with the hub 21, allowing it to rotate with the shaft 11 as the center of rotation. The rotating drive component 31 then acts on the limiting pin 41, driving the first end of the limiting pin 41, which in turn causes the second end of the limiting pin 41 to reciprocate through the limiting hole 211. Thus, the rotational movement of the drive component 31 achieves the reciprocating insertion and removal of the limiting pin 41 into the limiting hole 211. It should be noted that the first end of the limiting pin 41 is closer to the drive assembly 30, while the second end is closer to the roller assembly 20.

[0074] The braking device according to embodiments of the present invention has at least the following beneficial effects: Rotating the drive member 31 causes its inner side to abut against the first end of the limiting pin 41, thereby causing the second end of the limiting pin 41 to insert into the limiting hole 211. This, in turn, locks the wheel hub 21 through the second end of the limiting pin 41, thus restricting the rotation of the wheel hub 21 by the limiting pin 41 inserted into it, ultimately achieving the purpose of stopping the vehicle. Furthermore, locking the limiting pin 41 or the drive member 31 can prevent the limiting pin 41 from disengaging from the limiting hole 211, thereby ensuring stable braking without any safety hazards.

[0075] Specifically, refer to Figures 4 to 6In some embodiments of the present invention, the driving member 31 is rotatably disposed at one end of the housing 10. A driving inclined surface 311 is provided on the inner side of the driving member 31. The driving inclined surface 311 is arranged around one side of the rotating shaft 11, and the inclined surface of the driving inclined surface 311 abuts against the first end of the limiting pin 41. Rotating the driving member 31 causes the driving inclined surface 311 to continuously push the first end of the limiting pin 41. The driving inclined surface 311 is provided on the inner side of the driving member 31, i.e., the side facing the housing 10. The driving inclined surface 311 is arc-shaped and gradually shifts from one end to the other. Simultaneously, the arc surface of the driving inclined surface 311 coincides with the arc surface of the first end of the limiting pin 41. Therefore, when the driving member 31 rotates, it drives the driving inclined surface 311 to rotate on the arc surface, thereby gradually abutting the first end of the limiting pin 41 with its inclined surface. As the drive component 31 rotates continuously, the higher part of the drive ramp 311 continuously presses against and squeezes the first end of the limiting pin 41, thereby pushing the second end of the limiting pin 41 to insert into the limiting hole 211 of the wheel hub 21, thus achieving braking of the roller assembly 20.

[0076] Furthermore, referring to Figures 4 to 6 In some embodiments of the present invention, the inner side of the driving member 31 is further provided with a first limiting groove 312 and a second limiting groove 313. The first limiting groove 312 and the second limiting groove 313 are connected. Both the first limiting groove 312 and the second limiting groove 313 are arranged in an arc shape with the rotating shaft 11 as the rotation center. The driving assembly 30 also includes a first reset elastic member 32 and a reset limiting piece 33. The first reset elastic member 32 is disposed in the first limiting groove 312, and one end of the first reset elastic member 32 abuts against one end of the first limiting groove 312. The reset limiting piece 33 is disposed at one end of the outer shell 10 and located in the second limiting groove 313. One end of the reset limiting piece 33 abuts against one end of the second limiting groove 313, and the other end of the first reset elastic member 32 abuts against the other end of the reset limiting piece 33.

[0077] It is conceivable that the first limiting groove 312 is used to accommodate the first reset elastic member 32, and the second limiting groove 313 is used to accommodate the limiting piece disposed on the outer shell 10. The first limiting groove 312 and the second limiting groove 313 are connected, so one end of the first reset elastic member 32 abuts against the limiting piece, while the other end of the first reset elastic member 32 abuts against the driving member 31. At the same time, the other end of the limiting pin 41 can abut against the other end of the second limiting groove 313. When the driving member 31 rotates, it drives and compresses the first reset elastic member 32, so that the first reset elastic member 32 has elastic potential energy for the driving member 31 to rebound. Until the driving member 31 drives the limiting pin 41 to complete the corresponding action, the driving member 31 is released, and the driving member 31 can rebound to the initial position under the elastic action of the first reset elastic member 32. The other end of the limiting piece abuts the driving member 31 against the other end of the second limiting groove 313 inside the driving member 31, ensuring that the driving member 31 can rebound to the initial state, which is convenient for the next rotation.

[0078] Reference Figures 6 to 9 In some embodiments of the present invention, the brake assembly 40 further includes a first sleeve 42, which can be inserted into the housing 10. The second end of the first sleeve 42 abuts against the housing 10, and the first end of the first sleeve 42 is flush with one end of the housing 10. The length direction of the first sleeve 42 is parallel to the direction of the rotating shaft 11. A limiting pin 41 is movably inserted into the first sleeve 42, and both ends of the limiting pin 41 are retractable at both ends of the first sleeve 42. Specifically, the first end of the limiting pin 41 is located at the first end of the first sleeve 42, and the second end of the limiting pin 41 is located at the second end of the first sleeve 42. Therefore, the drive member 31 rotates to drive the first end of the limiting pin 41 to retract back and forth in the first end of the first sleeve 42. The retraction of the first end of the limiting pin 41 can drive the second end of the limiting pin 41 to retract back and forth in the second end of the first sleeve 42, thereby allowing it to pass back and forth through the limiting hole 211 of the wheel hub 21 to achieve the unlocking and locking of the roller assembly 20.

[0079] Furthermore, in some embodiments of the present invention, reference is made to... Figures 10 to 13The brake assembly 40 also includes a second reset elastic element 43. A first drive tooth 421 is provided inside the first end of the first sleeve 42, with the first drive tooth 421 facing the second end of the first sleeve 42. The limiting pin 41 includes a pressing block 411, a transmission block 412, and a limiting block 413. The pressing block 411 is slidably disposed in the first end of the first sleeve 42, and the first end of the pressing block 411 is the first end of the limiting pin 41. A plurality of first sliding grooves 4111 are provided on the circumference of the second end of the pressing block 411, evenly distributed around the circumference of the pressing block 411. A second drive tooth 4112 is provided at the end of the second end of the pressing block 411, facing the second end of the first sleeve 42. The transmission block 412 is rotatably disposed in the first sleeve 42, with its first end abutting against one end of the pressing block 411. A third drive tooth 4121 is provided on the outer circumference of the transmission block 412. The third drive tooth 4121 faces the first end of the first sleeve 42, and the tooth surface of the third drive tooth 4121 can abut against the tooth surface of the first drive tooth 421 and the tooth surface of the second drive tooth 4112 respectively; the limiting block 413 is disposed in the second end of the first sleeve 42, the first end of the limiting block 413 abuts against the second end of the transmission block 412, the second end of the limiting block 413 is the second end of the limiting pin 41, the second reset elastic member 43 is sleeved on the outside of the second end of the limiting block 413, one end of the second reset elastic member abuts against the first end of the limiting block 413, and the other end of the second reset elastic member 43 abuts against the end of the hub 21.

[0080] More specifically, in some embodiments of the present invention, reference is made to... Figures 11 to 13 The first sleeve 42 has multiple slide rails 422 at one end inside. The slide rails 422 are evenly spaced and distributed on the inner side of the first sleeve 42. One end of each slide rail 422 is provided with a first drive tooth 421. The slide rail 422 can slide in the first slide groove 4111. The tooth surface of the first drive tooth 421 can abut against the tooth surface of the third drive tooth 4121. The tooth surface of the third drive tooth 4121 can slide on the tooth surface of the first drive tooth 421. The outer periphery of the transmission block 412 has several second slide grooves 4122. The second slide grooves 4122 are evenly distributed on the periphery of the transmission block 412. The slide rails 422 can slide in the second slide grooves 4122. A third drive tooth 4121 is provided between adjacent second slide grooves 4122. The tooth surface of the third drive tooth 4121 can abut against the tooth surface of the second drive tooth 4112. The tooth surface of the third drive tooth 4121 can slide on the tooth surface of the second drive tooth 4112.

[0081] Here, the braking assembly 40 will be further explained using the process of completing one braking and unlocking cycle. Before proceeding, it is important to emphasize that even when the pressing block 411 is driven by the driving member 31, and one end of the second reset elastic member 43 abuts against the limiting block 413 and the other end against the end face of the wheel hub 21, the second reset elastic member 43 should be pre-loaded during installation to hold the limiting block 413 against the first sleeve 42, preventing the limiting block 413 from being mistakenly inserted into the limiting hole 211. That is, the pressing block 411, the transmission block 412, and the limiting block 413 are constantly subjected to the elastic force of the second reset elastic member 43 for reset, thus maintaining a tendency to retract.

[0082] Therefore, during the braking process: before actuating the brake, it should be noted that the first groove 4111 of the pressing member and the second groove 4122 on the transmission member are both located on the slide rail 422 inside the first sleeve 42. First, when the driving member 31 rotates and drives the driving inclined surface 311 to abut against the first end of the pressing block 411, the pressing block 411 moves towards the direction of the second end of the pressing block 411 under the pressure of the driving inclined surface 311, thereby causing the first groove 4111 on the periphery of the second end of the pressing block 411 and the second groove 4122 on the transmission block 412 to slide along the slide rail 422 inside the first sleeve 42. At this time, under the pre-pressing action of the second reset elastic member 43, the tooth surface of the second driving tooth 4112 on the end of the second end of the pressing block 411 engages with the tooth surface of the third driving tooth 4121 on the transmission block 412, that is, the tooth surface of the third driving tooth 4121 can abut against the tooth surface of the second driving tooth 4112. Due to the limitation of the slide rail 422, the tip of the second drive tooth 4112 failed to mesh with the root of the third drive tooth 4121.

[0083] Then, as the pressing block 411 continues to advance, the second slide groove 4122 slides out of the restriction of the slide rail 422. When the second slide groove 4122 slides out of the slide rail 422, the transmission block 412 can move towards the pressing block 411 under the action of the second reset elastic member 43. However, the pressing block 411 is also driven by the driving inclined surface 311 to move towards the transmission block 412. Therefore, the tooth surface of the third driving tooth 4121 of the transmission block 412 can slide along the tooth surface of the second driving tooth 4112. The transmission member rotates at a certain angle, so that the tooth tip of the second driving tooth 4112 can abut against the tooth root of the third saw tooth. The tooth surfaces of the third driving teeth 4121 on both sides of the third driving tooth 4121, that is, on both sides of the groove opening at one end of the second slide groove 4122, slide and misalign with the tooth surfaces on both sides of the second driving tooth 4112.

[0084] Next, as the pressing block 411 and the transmission block 412 continue to move toward the limiting hole 211, the second end of the limiting block 413 is inserted into the limiting hole 211.

[0085] Finally, when the second end of the limiting block 413 is inserted into the limiting hole 211 to complete the braking, the driving member 31 returns to its initial position under the reset of the first reset elastic member 32. The pressing block 411 loses the function of the driving inclined surface 311, and the second reset elastic member 43 can then push the limiting pin 41 as a whole towards the driving member 31. However, when the second reset elastic member 43 pushes the limiting block 413 back, the transmission block 412, under the action of the limiting block 413, pushes back the second driving tooth 4112 of the pressing block 411 through the third driving tooth 4121. As the pressing block 411 continues to retract along the slide rail 422, the tooth surfaces of the third driving teeth 4121 on both sides of one end of the second slide groove 4122 abut against the tooth surfaces of the first driving teeth 421 inside the first sleeve 42, and then slide further along the tooth surfaces of the first driving teeth 421. At this time, the transmission component rotates a certain angle for the second time until the tooth tip of the first driving teeth 421 abuts against the tooth root of the third driving teeth 4121. Since the first driving teeth 421 are set on the slide rail 422 with a fixed position, the transmission component cannot be pushed back further with the pressing block 411 under the abutment of the first driving teeth 421. Therefore, it can be expected that under the abutment of the transmission block 412, the second end of the limiting block 413 will be stably stopped in the limiting hole 211 of the hub 21.

[0086] It can be explained that during the process of the limiting block 413 being inserted into the limiting hole 211, the pressing block 411 is neither subjected to the force of the driving member 31 nor the elastic force of the second reset elastic member 43, and can slide freely in the first sleeve 42.

[0087] During the unlocking process of hub 21: First, drive component 31 is rotated again, which drives drive ramp 311 to rotate. Drive ramp 311 then abuts against the first end of pressing block 411, causing pressing block 411 to move toward transmission block 412. This causes the tooth surface of the second drive tooth 4112 of pressing block 411 to abut against the tooth surface of the third drive tooth 4121 of transmission block 412.

[0088] Then, under the pushing action of the pressing block 411, the transmission block 412 overcomes the force of the second reset elastic element 43 and moves towards the limiting block 413, thereby causing the root of the third driving tooth 4121 on the transmission block 412 to disengage from the tip of the first driving tooth 421 in the first sleeve 42.

[0089] As the transmission block 412 continues to advance, the tooth surface of the first drive tooth 421 completely disengages from the tooth surface of the third drive tooth 4121. The third drive tooth 4121 is freed from the constraint of the tooth surface of the first drive tooth 421. Under the action of the elastic force of the second reset elastic member 43, the transmission component can push back towards the pressing block 411. At this time, the transmission component rotates at a certain angle again, so that the tooth surface of the third drive tooth 4121 located on one side of the slot of the other second slide groove 4122 slides along the tooth surface of the first drive tooth 421 until the second slide groove 4122 slides into the slide rail 422.

[0090] Finally, under the action of the second reset elastic member 43, the transmission component can follow the pressing block 411 and continuously retract to the initial position, and the second end of the limiting block 413 can disengage from the limiting hole 211 to achieve the purpose of unlocking the brake.

[0091] Reference Figure 12 In some embodiments of the present invention, a first shaft 4123 is provided at the end of the first end of the transmission block 412, and the first shaft 4123 is rotatably inserted into the second end of the pressing block 411. A second shaft 4131 is provided at the end of the first end of the limiting block 413, and the second shaft 4131 is inserted into the second end of the transmission block 412. The transmission component is connected to the pressing block 411 and the limiting block 413 respectively through the first shaft 4123 and the second shaft 4131, which facilitates the rotation of the transmission component during the braking and unlocking processes.

[0092] Reference Figure 9 as well as Figure 12 In some embodiments of the present invention, the limiting block 413 includes a second sleeve 4132 and a locking pin 4133. The second sleeve 4132 is the first end of the limiting block 413, and a third reset elastic member 4132a is provided inside the second sleeve 4132; the first end of the locking pin 4133 passes through the second sleeve 4132, one end of the third reset elastic member 4132a abuts against the inside of the second sleeve 4132, and the other end of the third reset elastic member 4132a abuts against the end of the first end of the locking pin 4133; the second end of the locking pin 4133 can be inserted into the limiting hole 211. The locking pin 4133 is elastically connected to the second sleeve 4132 under the action of the third reset elastic member 4132a. When the locking pin 4133 is about to be inserted into the limiting hole 211, its elastic movement can prevent the locking pin 4133 from hard contacting the end face of the wheel hub 21 when the limiting hole 211 is not coaxial with the limiting pin 41, thus avoiding damage to the brake assembly 40.

[0093] Reference Figure 11In some embodiments of the present invention, a first groove 4132b is provided on the periphery of the second sleeve 4132, and a first buckle 4133a is provided at the end of the first end of the locking pin 4133. The first buckle 4133a can slide in the first groove 4132b. In order to prevent the locking pin 4133 from disengaging from the second sleeve 4132, in addition to the locking pin 4133 being connected to the third reset elastic member 4132a, the first buckle 4133a on the locking pin 4133 can also be engaged in the first groove 4132b, so that the locking pin 4133 can slide in the second sleeve 4132 along the direction of the first groove 4132b or the second sleeve 4132.

[0094] Reference Figures 10 to 12 In some embodiments of the present invention, a second slot 423 is provided at the second end of the first sleeve 42, and a second buckle 4134 is provided on the outer side of the first end of the limiting block 413. The second buckle 4134 can slide in the second slot 423, and a warning sign is provided on the outer surface of the second buckle 4134. A viewing window 12 is provided on the outer shell 10, and the position of the viewing window 12 corresponds to the position of the warning sign. According to the above embodiments of the brake assembly 40, the limiting block 413 can move back and forth at the second end in the first sleeve 42, thereby driving the second buckle 4134 to move back and forth, and further driving the warning sign provided on the outer surface of the second buckle 4134 to move back and forth. The warning sign can be set to red and green respectively, with the red area located at the end closer to the transmission block 412, and the green area located at the end away from the transmission block 412. Therefore, when the limiting block 413 is inserted into the limiting hole 211, the second latch 4134 slides closer to the wheel hub 21, and the red area is located below the viewing window 12. The user can observe the red area through the viewing window 12, indicating that the braking state is activated. Conversely, when the limiting block 413 is disengaged from the limiting hole 211, the second latch 4134 slides away from the wheel hub 21, and the green area is located below the viewing window 12. The user can observe the green area through the viewing window 12, indicating that the unlocked state is activated.

[0095] It should be noted that the viewing window 12 can be fitted with a transparent acrylic plate, transparent glass, or even a through hole for direct observation of the warning sign on the second buckle 4134.

[0096] Furthermore, in some embodiments of the present invention, reference is made to... Figure 10 as well as Figure 13The outer side of the first sleeve 42 is also provided with a third buckle 424, and the outer casing 10 is also provided with a third slot (not shown in the figure). The third buckle 424 is engaged in the third slot. In order to prevent the first sleeve 42 from rotating in the outer casing 10, a third slot can also be provided in the outer casing 10, and a third buckle 424 is provided at the corresponding position of the first sleeve 42. The third buckle 424 is fastened in the third slot, and the first sleeve 42 can be fixed in the outer casing 10.

[0097] Reference Figures 1 to 3 as well as Figure 14 According to a second aspect embodiment of the present invention, the trolley includes a braking device according to any one of the first aspects embodiments. The trolley also includes wheel brackets 50, and two sets of braking devices are provided. The two ends of the wheel brackets 50 are movably connected to the drive assembly 30, the roller assembly 20, and the brake assembly 40 respectively through the housing 10. By placing the braking devices at both ends of the trolley, the roller assemblies 20 on both sides of the trolley can be braked by the brake assembly 40, ensuring safe and stable braking of the trolley.

[0098] Furthermore, in some embodiments of the present invention, reference is made to... Figures 1 to 3 as well as Figure 14 At least one drive member 31 at both ends of the wheel bracket 50 is provided with a pedal part 314, which drives the drive member 31 to rotate. The pedal part 314 can be provided on both ends of the drive member 31 of the wheel bracket 50, so that the drive member 31 at any one of them can drive the pedal part 314 to drive the drive member 31 to rotate.

[0099] Furthermore, in some embodiments of the present invention, the trolley also includes a traction member (not shown in the figure). The traction member can be inserted into the wheel bracket 50, and its two ends are respectively connected to the drive member 31, driving the drive member 31 to rotate and thus drive another drive member 31 to rotate. When the pedal part 314 on the drive member 31 is only provided on one side of the drive assembly 30, the drive member 31 of the other side of the drive assembly 30 can be pulled by the traction member. That is, the two ends of the traction member are respectively provided on the inner side of the drive member 31. When the drive member 31 with the pedal part 314 is driven, the other drive member 31 can be driven to rotate by the traction member. It should be noted that the traction member can be a flexible metal rope or a flexible cotton rope, etc. Furthermore, in some embodiments of the present invention, the drive member 31 is provided with a mounting part 315 inside, and the mounting part 315 fixes the two ends of the traction member. The mounting part 315 can be a cylindrical cavity, and the two ends of the traction member can be connected to the cylinder and then installed in the mounting part 315, so that the traction member can be quickly disassembled or installed.

[0100] Reference Figures 15 to 17In some embodiments of the present invention, the trolley further includes a quick-release assembly 60, which is disposed in the housing 10. The quick-release assembly 60 is connected to the roller assembly 20 via a pivot 11. The quick-release assembly 60 is used to install or remove the roller assembly 20 by locking or unlocking the pivot 11.

[0101] Specifically, the first end of the rotating shaft 11 is connected to the roller assembly 20, and the second end of the rotating shaft 11 is inserted into the housing 10. The second end of the rotating shaft 11 includes a plug-in section 111 and a locking section 112. The plug-in section 111 and the locking section 112 are fixedly connected. The diameter of the plug-in section 111 is larger than the diameter of the locking section 112. The quick-release assembly 60 includes a locking piece 61. The locking piece 61 is slidably disposed in the housing 10. The locking section 112 can pass through the locking hole 612 at one end of the locking piece 61. The diameter of the locking hole 612 is larger than the diameter of the plug-in section 111. The locking hole 612 has a locking part 611, which can abut against the plug-in section 111.

[0102] The middle section of the rotating shaft 11 passes through the housing 10, and its insertion section 111 and locking section 112 pass through the locking hole 612 of the locking plate 61 in the housing 10. When in the locked state, the locking part 611 in the locking plate 61 is located in the locking section 112, and the end of the insertion section 111 abuts against the locking part 611, thus preventing the rotating shaft 11 from detaching from the housing 10. When the locking plate 61 slides upward, the locking part 611 of the locking hole 612 on the locking plate 61 moves upward, thereby disengaging from the end of the insertion section 112. At this time, the insertion section 112 can be aligned with the locking hole 612, so that the entire rotating shaft 11 can be pulled out from the housing 10, thereby facilitating the removal of the entire roller assembly 20 from the housing.

[0103] Furthermore, referring to Figures 15 to 17 In some embodiments of the present invention, the quick-release assembly 60 further includes a drive unit 62 and a fourth reset elastic member 63. The drive unit 62 is slidably disposed in the housing 10 and connected to the other end of the locking piece 61. Pressing the drive unit 62 drives the locking piece 61 to slide within the housing 10. The fourth reset elastic member 63 is disposed in the receiving groove 613 of the locking piece 61. One end of the fourth reset elastic member 63 abuts against the interior of the housing 10, and the other end abuts against the drive unit 62. Pressing the drive unit 62 causes the locking piece 61 to slide up and down within the housing 10, thereby disengaging the locking portion 611 of the locking piece 61 from or locking the insertion section 112. The fourth reset elastic member 63 can store elastic potential energy for resetting the drive unit 62 and the locking piece 61 to move down and lock the insertion section 112 when the drive unit 62 is pressed, thereby facilitating the quick installation and removal of the roller assembly 20.

[0104] Furthermore, referring to Figures 15 to 17In some embodiments of the present invention, the quick-release assembly 60 further includes a limiting rod 64. The limiting rod 64 is disposed in the locking plate 61 and passes through the oblong hole 614 of the locking plate 61. The oblong hole 614 extends along the sliding direction of the locking plate 61, and one end of the oblong hole 614 can communicate with the receiving groove 613. The rod portion of the limiting rod 64 can abut against the upper end of the oblong hole 614. When the second reset elastic member 63 resets the locking plate 61, the limiting rod 64 can abut against the upper end of the oblong hole 614 on the locking plate 61, thereby preventing the driving part 62, the locking plate 61, and the fourth reset elastic member 63 from falling out of the housing 10.

[0105] Reference Figures 1 to 3 as well as Figure 14 In some embodiments of the present invention, the outer casing 10 is movably connected to the wheel bracket 50 via a buffer member 51. The buffer member 51 may be an elastic rubber product or a spring. The elastic connection can reduce the bumps and vibrations of the trolley.

[0106] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A brake device characterized by comprising: include: The outer casing (10) has a rotating shaft (11) passing through its center. Roller assembly (20), the roller assembly (20) is disposed at one end of the housing (10), the roller assembly (20) includes a hub (21), the end face of the hub (21) near the end of the housing (10) is provided with a plurality of limiting holes (211), the hub (21) is coaxially disposed with the rotating shaft (11); A drive assembly (30) disposed at the other end of the housing (10), the drive assembly (30) including a rotatable drive member (31) coaxially disposed with the hub (21); and Brake assembly (40) is eccentrically disposed in the housing (10) and located on one side of the rotating shaft (11). Brake assembly (40) includes a movable limiting pin (41). The limiting pin (41) is coaxially disposed with the limiting hole (211). The second end of the limiting pin (41) is inserted into the limiting hole (211). The first end of the limiting pin (41) can abut against the driving member (31) to drive the driving member (31) to rotate so that the first end of the limiting pin (41) is inserted into the limiting hole (211). The limiting pin (41) is used to lock or unlock the wheel hub (21). The brake assembly (40) further includes a first sleeve (42), which can be inserted into the outer shell (10). The second end of the first sleeve (42) abuts against the outer shell (10). The first end of the first sleeve (42) is flush with one end of the outer shell (10). The length direction of the first sleeve (42) is parallel to the direction of the rotating shaft (11). The limiting pin (41) is movably inserted into the first sleeve (42). The two ends of the limiting pin (41) can extend and retract at the two ends of the first sleeve (42). The brake assembly (40) further includes a second reset elastic element (43), and a first drive tooth (421) is provided inside the first end of the first sleeve (42), the first drive tooth (421) being oriented toward the second end of the first sleeve (42). The limiting pin (41) includes: Pressing block (411), the pressing block (411) is slidably disposed in the first end of the first sleeve (42), the first end of the pressing block (411) is the first end of the limiting pin (41), the second end of the pressing block (411) is provided with a plurality of first sliding grooves (4111) on the periphery, the first sliding grooves (4111) are evenly distributed on the periphery of the pressing block (411), the end of the second end of the pressing block (411) is provided with a second driving tooth (4112), the second driving tooth (4112) faces the second end of the first sleeve (42); A transmission block (412) is rotatably disposed in the first sleeve (42). The first end of the transmission block (412) abuts against one end of the pressing block (411). A third driving tooth (4121) is provided on the outer periphery of the transmission block (412), facing the first end of the first sleeve (42). The tooth surface of the third driving tooth (4121) abuts against the tooth surface of the first driving tooth (421) and the tooth surface of the second driving tooth (4112), respectively. A limiting block (413) is disposed in the second end of the first sleeve (42). The first end of the limiting block (413) abuts against the second end of the transmission block (412). The second end of the limiting block (413) is the second end of the limiting pin (41). The second reset elastic member (43) is sleeved on the outside of the second end of the limiting block (413). One end of the second reset elastic member abuts against the first end of the limiting block (413), and the other end of the second reset elastic member (43) abuts against the end of the hub (21).

2. The braking device according to claim 1, characterized in that, The driving member (31) is rotatably disposed at one end of the housing (10). The inner side of the driving member (31) is provided with a driving inclined surface (311). The driving inclined surface (311) can be arranged around one side of the rotating shaft (11). The inclined surface of the driving inclined surface (311) can abut against the first end of the limiting pin (41). The driving member (31) is rotated so that the driving inclined surface (311) continuously pushes the first end of the limiting pin (41).

3. The braking device according to claim 2, characterized in that, The inner side of the driving component (31) is also provided with a first limiting groove (312) and a second limiting groove (313). The first limiting groove (312) and the second limiting groove (313) are connected. The first limiting groove (312) and the second limiting groove (313) are both arc-shaped with the rotating shaft (11) as the rotation center. The driving assembly (30) also includes: A first reset elastic element (32) is disposed in the first limiting groove (312), and one end of the first reset elastic element (32) abuts against one end of the first limiting groove (312); and A reset limiting piece (33) is disposed at one end of the outer shell (10) and located in the second limiting groove (313). One end of the reset limiting piece (33) abuts against one end of the second limiting groove (313), and the other end of the first reset elastic member (32) abuts against the other end of the reset limiting piece (33).

4. The braking device according to claim 1, characterized in that, The first sleeve (42) has a plurality of slide rails (422) at one end inside. The plurality of slide rails (422) are evenly spaced on the inner side of the first sleeve (42). The slide rail (422) has a first drive tooth (421) at one end. The slide rail (422) can slide in the first slide groove (4111). The tooth surface of the first drive tooth (421) can abut against the tooth surface of the third drive tooth (4121). The tooth surface of the third drive tooth (4121) can slide on the tooth surface of the first drive tooth (421). The outer periphery of the transmission block (412) is provided with a plurality of second sliding grooves (4122), which are evenly distributed on the periphery of the transmission block (412). The slide rail (422) can slide in the second sliding groove (4122). The third driving tooth (4121) is provided between adjacent second sliding grooves (4122). The tooth surface of the third driving tooth (4121) can abut against the tooth surface of the second driving tooth (4112), and the tooth surface of the third driving tooth (4121) can slide on the tooth surface of the second driving tooth (4112).

5. The braking device according to claim 1, characterized in that, The first end of the transmission block (412) is provided with a first shaft (4123), which is rotatably inserted into the second end of the pressing block (411). The first end of the limiting block (413) is provided with a second shaft (4131), which is inserted into the second end of the transmission block (412).

6. The braking device according to claim 1, characterized in that, The limiting block (413) includes: The second sleeve (4132) is the first end of the limiting block (413), and a third reset elastic element (4132a) is provided inside the second sleeve (4132); and The first end of the locking pin (4133) is inserted into the second sleeve (4132), one end of the third reset elastic member (4132a) abuts against the interior of the second sleeve (4132), the other end of the third reset elastic member (4132a) abuts against the end of the first end of the locking pin (4133), and the second end of the locking pin (4133) can be inserted into the limiting hole (211).

7. The braking device according to claim 6, characterized in that, The second sleeve (4132) has a first slot (4132b) on its periphery, and the first end of the first end of the locking pin (4133) has a first buckle (4133a) which can slide in the first slot (4132b).

8. The braking device according to claim 1, characterized in that, The second end of the first sleeve (42) is provided with a second slot (423), and the outer side of the first end of the limiting block (413) is provided with a second buckle (4134). The second buckle (4134) can slide in the second slot (423). The outer side of the second buckle (4134) is covered with a warning sign. The outer shell (10) is provided with a viewing window (12). The position of the viewing window (12) corresponds to the position of the warning sign.

9. The braking device according to claim 1, characterized in that, The outer side of the first sleeve (42) is also provided with a third buckle (424), and the outer shell (10) is also provided with a third slot, and the third buckle (424) is engaged in the third slot.

10. A trolley, characterized in that, The trolley includes the braking device as described in any one of claims 1 to 9, and further includes wheel brackets (50). The braking device is provided in two sets, and the two ends of the wheel brackets (50) are movably connected to the drive assembly (30), the roller assembly (20) and the brake assembly (40) respectively through the housing (10).

11. A trolley according to claim 10, characterized in that, At least one of the drive members (31) at both ends of the wheel bracket (50) is provided with a pedal part (314), through which the drive member (31) is driven to rotate.

12. A trolley according to claim 10, characterized in that, The trolley also includes a traction member, which can be inserted into the wheel bracket (50). The two ends of the traction member are respectively connected to the drive member (31) to drive the drive member (31) to rotate so as to drive the other drive member (31) to rotate.

13. A trolley according to claim 12, characterized in that, The drive component (31) has an internal mounting part (315) which fixes the two ends of the traction component.

14. A trolley according to claim 10, characterized in that, It also includes a quick-release assembly (60) disposed in the housing (10), the quick-release assembly (60) being connected to the roller assembly (20) via the pivot (11), the quick-release assembly (60) being used to install or remove the roller assembly (20) by locking or unlocking the pivot (11).

15. A trolley according to claim 14, characterized in that, The first end of the rotating shaft (11) is connected to the roller assembly (20), and the second end of the rotating shaft (11) is inserted into the housing (10). The second end of the rotating shaft (11) includes a plug-in section (111) and a locking section (112). The plug-in section (111) and the locking section (112) are fixedly connected. The diameter of the plug-in section (111) is larger than the diameter of the locking section (112). The quick-release assembly (60) includes: A locking plate (61) is slidably disposed in the outer casing (10). A locking segment (112) can be inserted into a locking hole (612) at one end of the locking plate (61). The diameter of the locking hole (612) is larger than the diameter of the insertion segment (111). The locking hole (612) has a locking part (611) that can abut against the insertion segment (111).

16. A trolley according to claim 15, characterized in that, The quick-release assembly (60) also includes: A drive unit (62) slidably disposed in the housing (10) and connected to the other end of the locking piece (61), wherein pressing the drive unit (62) drives the locking piece (61) to slide within the housing (10); and The fourth reset elastic element (63) is disposed in the receiving groove (613) of the locking piece (61), one end of the fourth reset elastic element (63) abuts against the inside of the outer shell (10), and the other end of the fourth reset elastic element (63) abuts against the driving part (62).

17. A trolley according to claim 16, characterized in that, The quick-release assembly (60) also includes a limiting rod (64), which is disposed in the locking piece (61) and passes through the waist-shaped hole (614) of the locking piece (61). The waist-shaped hole (614) extends along the sliding direction of the locking piece (61), and one end of the waist-shaped hole (614) communicates with the receiving groove (613). The rod portion of the limiting rod (64) can abut against the upper end of the waist-shaped hole (614).

Images