Hook type fastener mechanism

Abstract

A hook type fastener mechanism comprises a front cover, a rear cover, an unlocking structure and two lock hooks. The front cover and the rear cover are covered with each other, a cavity used for containing the unlocking structure is formed in the front cover and the rear cover, and the two side walls are each provided with an inlet used for allowing the two lock hooks to pass through. The unlocking structure comprises a driving part, an unlocking block and an elastic reset structure, and the unlocking block is movably arranged between the driving part and the elastic reset structure and abuts against the driving part and the elastic reset structure; the unlocking block is provided with two clamping hook parts; the elastic reset structure applies elastic force to the unlocking block, so that the two lock hooks passing through the inlet are buckled with the two clamping hook parts in a one-to-one correspondence manner, and a locking state is kept; and the driving part applies thrust to the unlocking block, so that the two clamping hook parts are separated from the two locking hooks. The upper end and the lower end of the unlocking block abut against the driving part and the elastic reset structure respectively, locking is stable, one-key operation can be achieved during unlocking, and the whole buckle mechanism is simple and compact in structure and firm in locking.

Description

Technical Field

[0001] The utility model relates to the field of buckles, in particular to a hook-type buckle mechanism. Background Art

[0002] In the prior art, child products such as strollers and seats are usually provided with a safety belt assembly, which can restrain children on the child products to ensure their safety during use. The safety belt assembly usually includes a seat belt and a buckle, and the seat belt can be locked and connected by the buckle.

[0003] Currently, seat belt buckles have various structures, but most of them have problems such as complex structure and insufficient locking.

[0004] Therefore, how to solve the above-mentioned deficiencies in the prior art has become the subject to be studied and solved in this utility model. Utility Model Content

[0005] The purpose of the utility model is to provide a hook type buckle mechanism.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A hook-type buckle mechanism comprises a front cover, a rear cover, an unlocking structure and two locking hooks;

[0008] The front cover and the rear cover cover each other, forming a cavity for accommodating the unlocking structure, and forming an entrance for the two locking hooks on each side wall;

[0009] The unlocking structure includes a driving portion, an unlocking block and an elastic reset structure, wherein the unlocking block is movably arranged between the driving portion and the elastic reset structure and abuts against both of them;

[0010] The unlocking block has two hook parts;

[0011] The elastic reset structure applies elastic force to the unlocking block, so that the two lock hooks passing through the entrance are engaged with the two hook portions in a one-to-one correspondence and maintain the locked state;

[0012] The driving part applies a thrust to the unlocking block, causing the two hook parts to be decoupled from the two locking hooks.

[0013] Preferably, the hook portion and the lock hook are in a hook shape that are engaged with each other, and the engaging surfaces of the two are parallel to the thrust direction, so that under the thrust of the driving portion, the two engaging surfaces are separated.

[0014] Further preferably, the unlocking block has two ejection parts, and the two ejection parts correspond to the two locking hooks one by one;

[0015] The ejection portion cooperates with the lock hook on the same side through a wedge surface, and the two wedge surfaces are distributed at an acute angle to the thrust direction, so that when the driving portion further applies thrust to the unlocking block, the ejection portion ejects the two lock hooks to the outside of the entrance.

[0016] Preferably, the driving part adopts a button, one end of the button passes through and extends to the outside of the front cover and the rear cover, and the other end of the button slides with the slide rail in the cavity and is limited in the cavity by a stop.

[0017] Further preferably, the cross-section of the opposing surfaces of the button and the unlocking block is trapezoidal.

[0018] Further preferably, the other end of the button is connected to a push rod, the end of the push rod passes through the unlocking block and is connected to an elastic supporting structure provided on the inner wall of the front cover or the rear cover.

[0019] Further preferably, the unlocking block is provided with a waist-shaped hole for passing the push rod, and the waist-shaped hole is arranged toward the hook portion on both sides, so that when the lock hook and the hook portion on one side are buckled, the unlocking block swings toward the lock hook on the other side under the limitation of the push rod.

[0020] Further preferably, the elastic support structure includes a spring fixing seat, a support spring and a spring clamping seat, the spring fixing seat is sleeved on the end of the push rod, one end of the support spring is sleeved on the spring fixing seat, and the other end is clamped in the spring clamping seat, and the spring clamping seat is fixed on the inner wall of the front cover or the rear cover.

[0021] Preferably, the elastic reset structure includes at least one pair of unlocking springs, each pair of unlocking springs corresponds to the two hook parts respectively, one end of the unlocking spring is sleeved on the limiting column on the two hook parts, and the other end is clamped in the socket on the inner wall of the front cover or the rear cover.

[0022] Further preferably, the diameter of the limiting column is smaller than the inner diameter of the unlocking spring, so that when the lock hook and the hook portion on one side are engaged, the limiting column swings inside the unlocking spring.

[0023] The working principle and advantages of this utility model are as follows:

[0024] The utility model provides an unlocking block inside the cover body, and the upper and lower ends of the unlocking block respectively abut against the driving part and the elastic reset structure. The elastic reset structure gives the unlocking block an upward elastic force, so that after the lock hook is inserted and engaged with the two hook parts of the unlocking block, it can be in a stable locked state. When the driving part gives the unlocking block a downward thrust, the unlocking block can be separated from the lock hook to achieve unhooking and unlocking. The entire buckle mechanism has a simple and compact structure and is securely locked.

[0025] The utility model gives the driving part an upward elastic force through the elastic support structure, which can reset the driving part when the buckle is unlocked. It also provides better pressing comfort when the driving part is pressed, and can prevent the driving part from being easily touched by mistake.

[0026] The utility model provides a waist-shaped hole on the unlocking block, so that when the lock hook is engaged, the unlocking block can swing left and right within the range limited by the waist-shaped hole, so that the lock hook can be engaged alone without causing the engaged lock hook to be unhooked, and the locking is more secure.

[0027] The unlocking structure of the present invention is assembled with the front cover and the rear cover in a basically snap-fit ​​manner, and has a simple structure. Therefore, the assembly difficulty of the entire buckle is very low, the assembly is simple and fast, and the assembly cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Attachment Figure 1 This is an overall front view of an embodiment of the utility model;

[0029] Attachment Figure 2 An exploded view of an embodiment of the present utility model;

[0030] Attachment Figure 3 This is a cross-sectional view of the buckle of the embodiment of the utility model when locked;

[0031] Attachment Figure 4 This is a cross-sectional view of the locking hook of the embodiment of the present utility model when it is unhooked;

[0032] Attachment Figure 5 This is a cross-sectional view of the lock hook of the embodiment of the present invention when it is ejected.

[0033] In the above attached figures:

[0034] 1 front cover;

[0035] 2 back cover;

[0036] 3 unlock structure;

[0037] 31 driving unit;

[0038] 311 button;

[0039] 312 putter;

[0040] 32 unlock blocks;

[0041] 321 hook part;

[0042] 3211 first fastening surface;

[0043] 3212 limit column;

[0044] 322 ejector;

[0045] 3221 first wedge surface;

[0046] 323 waist-shaped hole;

[0047] 33 elastic reset structure;

[0048] 331 unlocking spring;

[0049] 332 booths;

[0050] 34 elastic support structure;

[0051] 341 spring fixing seat;

[0052] 342 support spring;

[0053] 343 spring holder;

[0054] 4 lock hooks;

[0055] 41 second fastening surface;

[0056] 42 second wedge surface;

[0057] 5 entrances;

[0058] 6 slide rails;

[0059] 7 Stop talking. DETAILED DESCRIPTION

[0060] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0061] Embodiment: The present invention will be clearly illustrated below with drawings and detailed descriptions. After understanding the embodiments of the present invention, any person skilled in the art can make changes and modifications based on the techniques taught by the present invention without departing from the spirit and scope of the present invention.

[0062] The terms used herein are for describing specific embodiments only and are not intended to be limiting of the present invention. Singular forms such as "a," "the," "this," "this," and "the" as used herein also include plural forms.

[0063] As used herein, “connected” or “positioned” may refer to two or more components or devices being in direct or indirect physical contact with each other, or may refer to two or more components or devices operating or moving with each other.

[0064] The terms “include”, “including”, “have”, etc. used in this document are open-ended terms, meaning including but not limited to.

[0065] Unless otherwise noted, the terms used herein generally have their ordinary meanings in the art, in the context of this application, and in the specific context. Certain terms used to describe this application are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art regarding the description of this application.

[0066] The terms "front", "back", "up", "down", "left", "right", etc. used in this article are all directional terms. In this case, they are only used to illustrate the positional relationship between the various structures, and are not used to limit the protection plan of this case and the specific direction during actual implementation.

[0067] See attached Figure 1-5 As shown, a hook-type buckle mechanism includes a front cover 1, a rear cover 2, an unlocking structure 3 and two locking hooks 4.

[0068] The front cover 1 and the rear cover 2 overlap, forming a cavity for accommodating the unlocking structure 3. An entrance 5 for the two locking hooks 4 is formed on each side wall. The front cover 1 and the rear cover 2 are removably connected by screws. To seal the entrance 5, the contact area between the locking hooks 4 and the entrance 5 can be engaged by a stopper structure.

[0069] The unlocking structure 3 includes a driving part 31, an unlocking block 32 and an elastic reset structure 33. The unlocking block 32 is movably arranged between the driving part 31 and the elastic reset structure 33 and abuts against both of them, so that the unlocking block 32 can slide up and down in the cavity under the bidirectional force of the driving part 31 and the elastic reset structure 33.

[0070] in:

[0071] The unlocking block 32 has two hook portions 321 .

[0072] The elastic restoring structure 33 applies elastic force to the unlocking block 32 , so that the two locking hooks 4 passing through the inlet 5 are engaged with the two hook portions 321 in a one-to-one correspondence and maintain the locked state.

[0073] The driving portion 31 applies a thrust to the unlocking block 32 , causing the two hook portions 321 to be decoupled from the two locking hooks 4 .

[0074] The hook portion 321 and the lock hook 4 are interlocking hook-shaped, and their engaging surfaces (the first engaging surface 3211 on the hook portion 321 and the second engaging surface 41 on the lock hook 4) are parallel to the thrust direction, so that the two engaging surfaces separate under the thrust of the driving portion 31. In other embodiments, the two engaging surfaces may also be arranged at a smaller acute angle to the thrust direction, as long as separation is facilitated.

[0075] After the lock hook 4 is separated from the hook portion 321, the lock hook 4 will not pop out automatically, so a structure for ejecting the lock hook 4 is required: the unlocking block 32 has two ejecting portions 322, and the two ejecting portions 322 correspond to the two lock hooks 4 one by one; the ejecting portions 322 cooperate with the lock hook 4 on the same side through wedge surfaces (the first wedge surface 3221 on the ejecting portion 322 and the second wedge surface 42 on the lock hook 4), and the two wedge surfaces are distributed at an acute angle to the thrust direction, so that when the driving portion 31 further applies thrust to the unlocking block 32, the ejecting portions 322 eject the two lock hooks 4 to the outside of the entrance 5.

[0076] The driving portion 31 is a button 311. One end of the button 311 extends through and outside the front cover 1 and the rear cover 2. The other end of the button 311 slidably engages with the slide rail 6 in the cavity and is retained in the cavity by a stop 7. During operation, the button 311 engages with the slide rail 6 to ensure that it steadily pushes the unlocking block 32 downward, and the stop 7 prevents the button 311 from dislodging from the cavity.

[0077] The other end of the button 311 is connected to a push rod 312. The end of the push rod 312 passes through the unlocking block 32 and is connected to an elastic support structure 34 provided on the inner wall of the front cover 1 or the rear cover 2. In this embodiment, the elastic support structure 34 is provided on the inner wall of the rear cover 2. The elastic support structure 34 includes a spring fixing seat 341, a support spring 342, and a spring clamping seat 343. The spring fixing seat 341 includes an upper sleeve and a lower positioning column that are integrally provided. The upper sleeve of the spring fixing seat 341 is sleeved on the end of the push rod 312. One end of the support spring 342 is sleeved on the outside of the lower positioning column of the spring fixing seat 341, and the other end is clamped in the spring clamping seat 343. The spring clamping seat 343 is fixed to the inner wall of the front cover 1 or the rear cover 2. In this embodiment, the spring clamping seat 343 is fixed to the inner wall of the rear cover 2.

[0078] Since the entire buckle is relatively thin and the internal cavity space is limited, in order to ensure the strength of the elastic support structure 34, the volume of the elastic support structure 34 needs to be maximized. Therefore, the spring fixing seat 341 and the push rod 312 are set separately. During installation, the push rod 312 passes through the waist-shaped hole 323 and is connected to the spring fixing seat 341. At this time, the volume of the spring fixing seat 341 is not limited by the waist-shaped hole 323.

[0079] In this embodiment, the stiffness coefficient of the support spring 342 can be set larger, which can give the button 311 an upward elastic force, so that the button 311 is reset and the button 311 has better pressing comfort when pressed, and also prevents the button 311 from being easily touched by mistake.

[0080] The unlocking block 32 is provided with a waist-shaped hole 323 for passing the push rod 312. The waist-shaped hole 323 is arranged towards the hook portion 321 on both sides, so that when the lock hook 4 on one side is buckled with the hook portion 321, the unlocking block 32 swings towards the lock hook 4 on the other side under the limitation of the push rod 312.

[0081] The design of the waist-shaped hole 323 allows the unlocking block 32 to swing left and right relative to the button 311 when the lock hook 4 is inserted on one side. Specifically, when the left lock hook 4 is inserted, the hook portion 321 cooperates with the curved hook of the lock hook 4, causing the unlocking block 32 to move downward as a whole, with the left side lower and the right side higher. However, due to the restriction of the waist-shaped hole 323 on the push rod 312, the upper end of the unlocking block 32 has a limited swing range and will not disengage from the push rod 312. When the right lock hook 4 is inserted, the unlocking block 32 returns to a balanced state on both sides, and the left lock hook 4 will not be unhooked. Without the waist-shaped hole 323, the unlocking block 32 can only slide up and down. After the lock hook 4 on one side is inserted, the unlocking block 32 will move downward as the lock hook 4 on the other side is inserted, causing the first inserted lock hook 4 to be unhooked.

[0082] The elastic reset structure 33 includes at least one pair of unlocking springs 331, each pair of unlocking springs 331 corresponding to the two hook portions 321. One end of the unlocking spring 331 is sleeved on the limiting column 3212 on the two hook portions 321, and the other end is clamped in the clamping seat 332 on the inner wall of the front cover 1 or the rear cover 2. In this embodiment, the unlocking spring 331 is provided in a pair, and the clamping seat 332 is fixed on the inner wall of the rear cover 2. Figure 2-3 In other embodiments, the unlocking springs 331 may be provided in two or more pairs.

[0083] The diameter of the limiting column 3212 is smaller than the inner diameter of the unlocking spring 331, so that when the lock hook 4 on one side is engaged with the hook portion 321, the limiting column 3212 swings inside the unlocking spring 331. This design allows the limiting column 3212 to swing freely inside the unlocking spring 331 when the unlocking block 32 swings, without damaging the unlocking spring 331.

[0084] In this embodiment, the stiffness coefficient of the unlocking spring 331 can be set to be smaller so that the lock hook 4 can be easily engaged with the hook portion 321 when inserted.

[0085] The cross-section of the opposing surfaces of the button 311 and the unlocking block 32 is trapezoidal, which can increase the contact area between the button 311 and the unlocking block 32 on the one hand, so that the button 311 has a better pushing feel when pressed; on the other hand, it can facilitate the swinging of the unlocking block 32 when the lock hook 4 is inserted.

[0086] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention are intended to be included in the scope of protection of the present invention.

Claims

1. A hook-type buckle mechanism, characterized in that: It includes a front cover, a rear cover, an unlocking structure and two locking hooks; The front cover and the rear cover cover each other, forming a cavity for accommodating the unlocking structure, and forming an entrance for the two locking hooks on each side wall; The unlocking structure includes a driving portion, an unlocking block and an elastic reset structure, wherein the unlocking block is movably arranged between the driving portion and the elastic reset structure and abuts against both of them; The unlocking block has two hook parts; The elastic reset structure applies elastic force to the unlocking block, so that the two lock hooks passing through the entrance are engaged with the two hook portions in a one-to-one correspondence and maintain the locked state; The driving part applies a thrust to the unlocking block, causing the two hook parts to be decoupled from the two locking hooks.

2. The hook-type buckle mechanism according to claim 1, characterized in that: The hook portion and the lock hook are in a hook shape that are engaged with each other, and the engaging surfaces of the two are parallel to the thrust direction, so that the two engaging surfaces are separated under the thrust of the driving portion.

3. The hook-type buckle mechanism according to claim 2, characterized in that: The unlocking block has two ejection parts, and the two ejection parts correspond to the two locking hooks one by one; The ejection portion cooperates with the lock hook on the same side through a wedge surface, and the two wedge surfaces are distributed at an acute angle to the thrust direction, so that when the driving portion further applies thrust to the unlocking block, the ejection portion ejects the two lock hooks to the outside of the entrance.

4. The hook-type buckle mechanism according to claim 1, characterized in that: The driving part adopts a button, one end of the button passes through and extends to the outside of the front cover and the rear cover, and the other end of the button slides with the slide rail in the cavity and is limited in the cavity by a stop.

5. The hook-type buckle mechanism according to claim 4, characterized in that: The cross-section of the opposing surfaces of the button and the unlocking block is trapezoidal.

6. The hook-type buckle mechanism according to claim 4, characterized in that: The other end of the button is connected to a push rod, the end of which passes through the unlocking block and is connected to an elastic supporting structure provided on the inner wall of the front cover or the rear cover.

7. The hook-type buckle mechanism according to claim 6, characterized in that: The unlocking block is provided with a waist-shaped hole for passing the push rod, and the waist-shaped hole is arranged towards the hook parts on both sides, so that when the lock hook and the hook part on one side are buckled, the unlocking block swings towards the lock hook on the other side under the limit of the push rod.

8. The hook-type buckle mechanism according to claim 6, characterized in that: The elastic support structure includes a spring fixing seat, a support spring and a spring clamping seat. The spring fixing seat is sleeved on the end of the push rod. One end of the support spring is sleeved on the spring fixing seat, and the other end is clamped in the spring clamping seat. The spring clamping seat is fixed on the inner wall of the front cover or the rear cover.

9. The hook-type buckle mechanism according to claim 1, characterized in that: The elastic reset structure includes at least one pair of unlocking springs, each pair of unlocking springs corresponds to the two hook parts respectively, one end of the unlocking spring is sleeved on the limiting column on the two hook parts, and the other end is clamped in the socket on the inner wall of the front cover or the rear cover.

10. The hook-type buckle mechanism according to claim 9, characterized in that: The diameter of the limiting column is smaller than the inner diameter of the unlocking spring, so that when the lock hook and the hook portion on one side are engaged, the limiting column swings in the unlocking spring.

Images