Slide rail locking mechanism, seat slide rail, and automobile

Abstract

The invention discloses a slide rail locking mechanism, a seat slide rail, and a car. The slide rail locking mechanism comprises two sets of matching lock cards and a clamping part. The first clamping part (11) and the second clamping part (12) are both configured as follows: a first tooth pitch is provided between a plurality of adjacent high and low teeth arranged at intervals, and a clamping mouth (11c, 12c) is formed respectively; the first lock card (21) and the second lock card (22) are both configured as follows: the second tooth pitch between adjacent lock teeth is twice the first tooth pitch; along the displacement direction of the slide rail, the first high tooth (11a) and the first low tooth (11b) on the first clamping part (11) and the second high tooth (12a) and the second low tooth (12b) on the second clamping part (12) are respectively arranged oppositely; the plurality of first lock teeth (21a) on the first lock card (21) and the plurality of second lock teeth (22a) on the second lock card (22) are respectively arranged in an interlaced manner. Through structural optimization, the present scheme can effectively reduce the manufacturing cost of the product on the basis of meeting the safety of the use of the slide rail.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical design, and in particular to a slide rail locking mechanism, a seat slide rail and a car. Background Art

[0002] Car seat slides are one of the important safety parts in cars, and their safety has always been the focus of product research and development. Among them, strength is the main guarantee of slide safety. Therefore, the strength of the slide runs through the entire slide design. With the continuous innovation of technology, the strength of the slide in the locked state can be improved by increasing the number of locking teeth (6 teeth, 8 teeth, 10 teeth).

[0003] In addition to using the strength of the slide rail to ensure safety, safety issues during use also need to be considered. For example, during the forward and backward adjustment process, if the lock card does not fall into the locked position after the unlocking handle is released, there will be a great safety hazard if an accident occurs. To overcome this problem, the prior art proposes a slide rail locking mechanism that uses more than three independent locking mechanisms for differential locking. When the unlocking handle is released at any adjustment position, the lock card can at least achieve pre-locking. This pre-locking function improves the safety performance of the slide rail to a certain extent.

[0004] However, due to its own principle limitations, this solution requires at least three locking mechanisms to satisfy the pre-locking function, there are problems of complex structure, and the manufacturing cost cannot be effectively controlled.

[0005] In view of this, it is urgent to optimize the design of the locking mechanism of the seat slide rail to overcome the above technical defects. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a slide rail locking mechanism, a seat slide rail, and a car. Through structural optimization, the product manufacturing cost can be effectively reduced while ensuring the safety of the slide rail.

[0007] The slide rail locking mechanism provided by the present invention comprises a clamping part and a locking card respectively arranged on the outer rail and the inner rail, the locking card having a plurality of locking teeth arranged at intervals, and the clamping part having a plurality of bayonet holes arranged at intervals, and the two can be adapted to switch between the locking working position and the unlocking working position; the matching locking cards and the clamping parts are arranged in two groups; wherein the first clamping part and the second clamping part are both configured as: having a plurality of high teeth and low teeth arranged in sequence at intervals, a first tooth pitch is provided between adjacent high teeth and low teeth, and the bayonet holes are respectively formed; the first locking card and the second locking card are both configured as: the second tooth pitch between adjacent locking teeth is twice the first tooth pitch; along the displacement direction of the slide rail, the plurality of first high teeth on the first clamping part and the plurality of second high teeth on the second clamping part, as well as the plurality of first low teeth on the first clamping part and the plurality of second low teeth on the second clamping part are respectively arranged opposite to each other; the plurality of first locking teeth on the first locking card and the plurality of second locking teeth on the second locking card are respectively arranged alternately.

[0008] Preferably, the first locking tooth on the first locking card and the second locking tooth on the second locking card are configured such that one is located at a middle position between two adjacent ones along the displacement direction of the slide rail.

[0009] Preferably, the first high teeth, the first low teeth, the second high teeth and the second low teeth are all rectangular teeth.

[0010] Preferably, the tooth tops of the rectangular teeth have chamfers.

[0011] Preferably, a tooth height difference between the first high tooth and the first low tooth and a tooth height difference between the second high tooth and the second low tooth are at least equal to a tooth thickness of the first locking tooth and the second locking tooth.

[0012] Preferably, a tooth height difference between the first high tooth and the first low tooth and a tooth height difference between the second high tooth and the second low tooth are both equal to the tooth thickness of the first locking tooth and the second locking tooth.

[0013] Preferably, the first engaging portion and the second engaging portion are arranged on both sides of the bent body of the outer rail, and the first locking card and the second locking card are arranged on both sides of the bent body of the inner rail.

[0014] Preferably, the first engaging portion and the second engaging portion are respectively formed integrally with the bent body of the outer rail on the corresponding side.

[0015] The present invention also provides a seat slide rail, comprising an outer rail and an inner rail that match each other, wherein a slide rail locking mechanism is provided between the outer rail and the inner rail; the slide rail locking mechanism adopts the slide rail locking mechanism described above.

[0016] The present invention also provides an automobile, comprising a seat connected to the automobile chassis via a seat slide rail, wherein the seat slide rail is the seat slide rail as described above.

[0017] In view of the existing technology, this solution takes a different approach and proposes a simplified slide rail locking mechanism, which uses two independent lock cards to achieve locking, pre-locking and unlocking functions, and is configured with two engaging parts accordingly. Specifically, the first engaging part and the second engaging part are both configured to have a plurality of high teeth and low teeth arranged in sequence, and there is a first tooth pitch between adjacent high and low teeth that can form a bayonet; along the displacement direction of the slide rail, the first high teeth on the two engaging parts are arranged opposite to the second high teeth, and the first low teeth are arranged opposite to the second low teeth, that is, the outer rail side provides two groups of locking structures that are synchronized along the displacement direction; and the first locking teeth on the first lock card and the second locking teeth on the second lock card are arranged alternately, that is, the inner rail side provides two groups of locking structures that are staggered along the displacement direction. On this basis, based on the structural design that the second pitch between adjacent lock teeth of the first lock card and the second lock card is twice the first pitch, after the unlocking handle is released, according to the relative position relationship between the inner and outer rails, the two sets of locking structures have two locking states: first, the lock teeth on the two lock cards fall into the corresponding stopper of the engaging part, achieving the locking state of the slide rail; second, the lock teeth on one of the two lock cards abut against the top of the low teeth of the corresponding engaging part, and the lock teeth on the other abut against the top of the high teeth of the corresponding engaging part, achieving the pre-locking state of the slide rail; that is, the lock card on the side where the lock teeth abut against the top of the low teeth is provided with safety limit protection by the high teeth on both sides, and at this time, after the slide rail receives the forward or backward sliding force, the inner and outer rails move forward and backward a little, so that the lock teeth on the two lock cards fall into the corresponding stopper of the engaging part, switching from the pre-locking state to the slide rail locking state. It has the characteristics of relatively simple structure and high safety and reliability, and can be widely used in different seat slide products.

[0018] In the preferred embodiment of the present invention, the first locking tooth on the first locking card and the second locking tooth on the second locking card are configured such that one is located in the middle of two adjacent ones of the other along the displacement direction of the slide rail. As a result, the locking structure has a higher degree of adaptability, and the locking structures on both sides have a high consistency, which can further reduce the process cost of manufacturing products; at the same time, when switching from the pre-locking state to the slide rail locking state, the inner and outer rails move forward and backward by the same amount, which can improve the safety of the mechanism and also enhance the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the locking state of the slide rail locking mechanism described in the specific implementation method;

[0020] Figure 2 for Figure 1 A schematic diagram of the relative position relationship between the locking teeth of the slide rail locking mechanism and the corresponding side bayonet shown in FIG.

[0021] Figure 3 It is a schematic diagram of the pre-locking state of the slide rail locking mechanism described in the specific implementation method;

[0022] Figure 4 for Figure 3 A schematic diagram of the relative position relationship between the locking teeth of the slide rail locking mechanism and the corresponding side bayonet shown in FIG.

[0023] Figure 5 It is a schematic diagram of the principle of the slide rail locking mechanism switching from the pre-locking state to the locking state according to the specific implementation method.

[0024] In the figure:

[0025] The first engaging portion 11, the first high teeth 11a, the first low teeth 11b, and the first bayonet 11c;

[0026] The second engaging portion 12, the second high teeth 12a, the second low teeth 12b, and the second bayonet 12c;

[0027] A first locking card 21, a first locking tooth 21a;

[0028] The second locking card 22 and the second locking tooth 22a. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] Without loss of generality, this embodiment uses the slide rail locking mechanism shown in the figure to explain in detail its locking, pre-locking and unlocking principles. The slide rail locking mechanism is arranged between the inner and outer rails of the slide rail. Under the action of the unlocking handle, the lock teeth on the lock card can be separated from the bayonet of the engaging portion, and can form a displacement tendency to fall into the bayonet after the unlocking handle is released based on the action of the reset mechanism. It should be understood that the functions of the unlocking handle and the reset mechanism are not the core invention of this application, and do not constitute a substantial limitation on the technical solution claimed for protection in this application.

[0031] See also Figure 1 and Figure 2 ,in, Figure 1 Schematic diagram of the locking state of the slide rail locking mechanism according to this embodiment. Figure 2 for Figure 1 A schematic diagram of the relative position relationship between the locking teeth of the slide rail locking mechanism and the corresponding side bayonet is shown in FIG.

[0032] The slide rail locking mechanism comprises a clamping part (11, 12) and a locking card (21, 22) respectively arranged on the outer rail A and the inner rail (not shown in the figure). As shown in the figure, the locking card has a plurality of locking teeth arranged at intervals, and the clamping part has a plurality of bayonet holes (11c, 12c) arranged at intervals, and the two can be adapted to switch between the locking working position and the unlocking working position; that is, when all the locking teeth fall into the corresponding bayonet holes, it is the locking working position, and the relative position between the inner and outer rails is fixed; and when all the locking teeth are out of the corresponding bayonet holes, it is the unlocking working position, and the relative position between the inner and outer rails is adjustable.

[0033] In this solution, the matching lock cards (21, 22) and the engaging parts (11, 12) are arranged in two groups, wherein the first lock card 21 and the second lock card 22 are arranged on both sides of the bent body of the outer rail, and the first engaging part 11 and the second engaging part 12 can also be arranged on both sides of the bent body of the inner rail.

[0034] Wherein, the first engaging portion 11 and the second engaging portion 12 are both configured as: having a plurality of high teeth (11a, 12a) and low teeth (11b, 12b) arranged in sequence and at intervals, a first tooth pitch T1 is provided between adjacent high teeth (11a, 12a) and low teeth (11b, 12b), and bayonet holes (11c, 12c) are formed respectively; along the displacement direction of the slide rail, the plurality of first high teeth 11a on the first engaging portion 11 and the plurality of second high teeth 12a on the second engaging portion 12 are arranged one by one opposite to each other, and the plurality of first low teeth 11b on the first engaging portion 11 and the plurality of second low teeth 12b on the second engaging portion 12 are arranged one by one opposite to each other; that is, the outer rail side provides two sets of locking structures synchronized along the displacement direction.

[0035] The first locking card 21 and the second locking card 22 are configured such that the second tooth pitch T2 between adjacent locking teeth (21a, 22a) is twice the first tooth pitch T1; along the displacement direction of the slide rail, the first locking teeth 21a on the first locking card 21 and the second locking teeth 22a on the second locking card 22 are arranged alternately. In other words, the inner rail side provides two sets of locking structures that are alternately arranged along the displacement direction.

[0036] When the unlocking handle is operated, the first locking teeth 21a of the first locking card 21 and the second locking teeth 22a of the second locking card 22 can all be disengaged from the corresponding bayonet holes, so that the relative positions can be adjusted according to user needs.

[0037] After the unlocking handle is released, based on the structural design that the second tooth pitch T2 between adjacent locking teeth of the first lock card 21 and the second lock card 22 is twice the first tooth pitch T1, according to the relative position relationship between the inner and outer rails, the two sets of locking structures have two locking states: locked state and pre-locked state. Please refer to Figure 3 and Figure 4 ,in, Figure 3is a schematic diagram of the pre-locking state of the slide rail locking mechanism described in this embodiment, Figure 4 for Figure 3 A schematic diagram of the relative position relationship between the locking teeth of the slide rail locking mechanism and the corresponding side bayonet is shown in FIG.

[0038] like Figure 1 and Figure 2 As shown, the locking teeth on the two locking clips all fall into the corresponding stoppers of the locking parts, thereby achieving a locked state of the slide rail.

[0039] like Figure 3 and Figure 4 As shown, in the two lock cards, the first locking tooth 21a on the first locking card 21 abuts against the tooth top of the first low tooth 11b of the corresponding first engaging portion 12, and the second locking tooth 22a on the second locking card 22 abuts against the tooth top of the second high tooth 12a of the corresponding second engaging portion 12, thereby achieving a pre-locking state of the slide rail; that is, the first locking card 21 can at least be provided with a safety limit guarantee by the first high tooth 11a of the first engaging portion 11. At this time, after the slide rail receives a forward or backward sliding force, the inner and outer rails move forward and backward a small amount, so that the locking teeth on the two locking cards can fall into the corresponding engaging portion stopper, and the slide rail is locked. Figure 4 The pre-locking state shown is switched to Figure 2 The slide rail is locked. The structure is relatively simple and has high safety and reliability. Please also refer to Figure 5 , which shows the principle of switching from the pre-locking state to the locking state, Figure 5 The middle diagram shows the pre-locking state, and the left and right diagrams show the two locking working positions formed after the forward and backward sliding forces, respectively.

[0040] Furthermore, the first lock tooth 21a on the first lock card 21 and the second lock tooth 22a on the second lock card 22 are preferably configured as follows: along the displacement direction of the slide rail, one is located in the middle of the other two adjacent ones. As shown in the figure, the first lock tooth 21a is located in the middle of the two second lock teeth 22a. Based on the characteristics of equal tooth pitch, the second lock tooth 22a is also located in the middle of the two first lock teeth 21a. With this arrangement, the locking structure has a higher degree of adaptability, and the consistency of the locking structures on both sides is high, which can further reduce the process cost of manufacturing products; at the same time, when switching from the pre-locking state to the slide rail locking state, the inner and outer rails move forward and backward by the same amount, which can improve the user experience on the basis of improving the safety of the mechanism.

[0041] It is understandable that the high and low teeth on the engaging portion can adopt different tooth shapes, and any tooth shape is within the scope of protection requested by this application as long as the above-mentioned locking, pre-locking and unlocking functional requirements are met. For example, but not limited to the rectangular teeth shown in the figure, on the one hand, it is conducive to processing and molding, and at the same time, a reliable locking and limiting function can be constructed.

[0042] In addition, the top of the rectangular tooth preferably has a chamfer, so that the locking teeth (21a, 22a) can smoothly fall into the corresponding bayonet (11c, 12c) after the unlocking handle is released, ensuring that the entire mechanism obtains good actuation performance.

[0043] In order to further improve the locking reliability, the tooth height difference between the high teeth and the low teeth can be, as a preference, the tooth height difference H1 between the high and low teeth is at least equal to the tooth thickness H2 of the first locking tooth 21a and the second locking tooth 22a. For example, but not limited to, the tooth height difference H1 between the high and low teeth of the engaging portion is equal to the tooth thickness H2 of the locking teeth of the locking card, which can minimize the working stroke of the locking teeth falling into the corresponding bayonet on the basis of fully utilizing the bearing capacity of the locking teeth, thereby improving work efficiency.

[0044] In addition, in this solution, two sets of matching engaging parts and locking cards are respectively arranged on both sides of the bent body of the inner and outer rails, and the first engaging part 11 and the second engaging part 12 are respectively integrally formed with the bent body of the corresponding side outer rail to further improve the processability.

[0045] Of course, according to the non-standard slide rail settings under different usage conditions, in theory, the above two sets of locking structures can also be arranged on the body on the same side of the slide rail displacement direction.

[0046] In addition to the aforementioned slide rail locking mechanism, this embodiment further provides a seat slide rail, including an outer rail and an inner rail that match each other, and a slide rail locking mechanism as described above is provided between the outer rail and the inner rail, so that the user can adjust the slide rail to switch between the locking working position and the unlocking working position, thereby meeting the use needs of adjusting the seat position. Here, other functional components of the seat slide rail can be implemented using existing technologies, so they will not be described in detail herein.

[0047] In addition to the aforementioned seat rails, this embodiment also provides a car, including a seat connected to the car chassis via the aforementioned seat rails. It should also be noted that other functional components of the car can be implemented using existing technologies, so they will not be described in detail herein.

[0048] It should be understood that the "unlocking", "locking" and "pre-locking" in this article refer to the working positions that ensure the relative unlocking, locking and pre-locking positions of the inner and outer rails of the slide rails, rather than being limited to a specific "point" position.

[0049] At the same time, the ordinal numbers "first" and "second" used in this article are used to distinguish the same composition and structure of two groups of locking structures. It can be understood that the use of the above-mentioned directional words is only used to clearly describe the relative position relationship between the related compositions or structures, and does not constitute an understanding limitation on the technical solution requested for protection in this application.

[0050] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A slide rail locking mechanism, comprising a clamping part and a locking card respectively arranged on an outer rail and an inner rail, wherein the locking card has a plurality of locking teeth arranged at intervals, and the clamping part has a plurality of bayonet holes arranged at intervals, and the two can be adapted to switch between a locking working position and an unlocking working position; characterized in that: The matching lock cards and the engaging parts are arranged in two groups; wherein, The first engaging portion (11) and the second engaging portion (12) are both configured to have a plurality of high teeth and low teeth that are sequentially spaced apart, with a first tooth pitch between adjacent high teeth and low teeth, and to form the bayonet holes (11c, 12c) respectively; The first locking card (21) and the second locking card (22) are both configured such that: a second tooth pitch between adjacent locking teeth is twice the first tooth pitch; Along the displacement direction of the slide rail, the plurality of first high teeth (11a) on the first engaging portion (11) and the plurality of second high teeth (12a) on the second engaging portion (12) as well as the plurality of first low teeth (11b) on the first engaging portion (11) and the plurality of second low teeth (12b) on the second engaging portion (12) are respectively arranged opposite to each other; the plurality of first locking teeth (21a) on the first locking card (21) and the plurality of second locking teeth (22a) on the second locking card (22) are respectively arranged in an alternating manner.

2. The slide rail locking mechanism according to claim 1, characterized in that: The first locking tooth (21a) on the first locking card (21) and the second locking tooth (22a) on the second locking card (22) are configured such that one is located in the middle of two adjacent ones along the displacement direction of the slide rail.

3. The slide rail locking mechanism according to claim 1 or 2, characterized in that: The first high teeth (11a), the first low teeth (11b), the second high teeth (12a) and the second low teeth (12b) are all rectangular teeth.

4. The slide rail locking mechanism according to claim 3, characterized in that: The tooth tops of the rectangular teeth have chamfers.

5. The slide rail locking mechanism according to claim 4, characterized in that: The tooth height difference between the first high tooth (11a) and the first low tooth (11b) and the tooth height difference between the second high tooth (12a) and the second low tooth (12b) are both equal to the tooth thickness of the first locking tooth (21a) and the second locking tooth (22a).

6. The slide rail locking mechanism according to claim 1, characterized in that: The first engaging portion (11) and the second engaging portion (12) are arranged on both sides of the bent body of the outer rail, and the first locking card (21) and the second locking card (22) are arranged on both sides of the bent body of the inner rail.

7. The slide rail locking mechanism according to claim 6, characterized in that: The first clamping portion (11) and the second clamping portion (12) are respectively formed integrally with the bent body of the outer rail on the corresponding side.

8. A seat slide rail, comprising an outer rail and an inner rail adapted to each other, wherein a slide rail locking mechanism is provided between the outer rail and the inner rail; characterized in that: The slide rail locking mechanism adopts the slide rail locking mechanism according to any one of claims 1 to 7.

9. An automobile, comprising a seat connected to the chassis of the automobile via a seat slide rail, characterized in that: The seat slide rail adopts the seat slide rail according to claim 8.

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