Locking mechanism for two-row rear middle and large armrest of automobile seat

Abstract

The utility model belongs to the technical field of automobile parts, and provides a locking mechanism for two rows of rear middle and large armrests of an automobile seat, which comprises a lock shell component, a lock cover component and a fastener, the lock shell component is provided with a lock shell body, a lock cover and a fastener, the lock shell body and the lock cover are connected with an armrest metal framework arranged outside through the fastener, and an elastic piece is arranged on the lock shell body; a connecting shaft is arranged on the ratchet wheel, and the connecting shaft and the ratchet wheel are integrally formed. Compared with the prior art, the utility model has the advantages that the ratchet wheel and the pawl are both manufactured by adopting an integrated cold heading forming process, so that the fit clearance between the ratchet wheel and the shaft (the ratchet wheel and the mounting shaft as well as the pawl and the connecting shaft) is successfully eliminated, and the stability and the reliability of the mechanism in a locking state are greatly improved. The design has the advantages that the problems of overlarge gap between the large armrest and the seat backrest, shaking and the like caused by tolerance accumulation of parts during mass production are solved, so that the comfort of a user in the using process is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile parts, and in particular relates to a locking mechanism for a middle and large armrest at the rear of a second row of automobile seats. Background Art

[0002] With the rapid development of the automotive industry and the increasing demand of users for driving comfort, the design and manufacturing process of automotive seat accessories are facing increasingly higher requirements.

[0003] Especially for the important component of the second-row rear middle and large armrest, the optimization of its functionality, safety and ease of operation is particularly important. During the mass production process of the traditional car seat armrest locking mechanism, the parts processing tolerance is difficult to strictly control within the design requirements, which easily leads to excessive gaps or obvious shaking between the assembled armrest and the seat back, thus affecting the passengers' riding experience. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a locking mechanism for the middle and large armrests at the rear of the second row of automobile seats with precise design and stable and reliable functions in view of the current status of the prior art.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: a locking mechanism for a large and medium armrest behind the second row of automobile seats is proposed, comprising: a lock housing assembly, the lock housing assembly having a lock housing, a lock cover and a fastener, the lock housing and the lock cover are connected to an externally arranged metal frame of the armrest through a fastener, and an elastic member is arranged on the lock housing;

[0006] A pawl, wherein a connecting shaft is arranged on the pawl, wherein the connecting shaft and the pawl are integrally formed, and wherein the connecting shaft is movably inserted into the lock housing, so that the pawl is rotatably arranged on the lock housing, and the pawl is movably connected to the elastic member;

[0007] A ratchet, wherein the ratchet is located on the lock housing and is movably engaged with the pawl, a mounting shaft is provided on the ratchet, the mounting shaft and the ratchet are integrally formed, one end of the mounting shaft passes through the lock cover and is movably connected to the armrest metal frame, and the other end of the mounting shaft passes through the lock housing and is fixedly connected to an externally arranged car seat.

[0008] In the above-mentioned locking mechanism for the middle and large armrest behind the second row of automobile seats, a fixing seat is provided on the lock shell, the elastic member is sleeved on the fixing seat, one end of the elastic member is clamped with the fixing seat, and the other end of the elastic member is movably abutted against the pawl.

[0009] In the above-mentioned locking mechanism for the middle and large armrest behind the second row of automobile seats, a zipper fixing block is provided on the end of the lock shell away from the lock cover, and the connecting shaft passes through the fixing seat and the lock shell is connected to the zipper fixing block.

[0010] In the above-mentioned locking mechanism for the middle and large armrest at the rear of the second row of automobile seats, the pawl is provided with a locking portion and a first connecting portion, the ratchet is provided with a locking groove, the first connecting portion movably abuts against the elastic member, and the locking portion movably abuts against the locking groove.

[0011] In the above-mentioned locking mechanism for the middle and large armrest at the rear of the second row of automobile seats, the ratchet is provided with a first limiting portion and a second limiting portion, and the lock housing is provided with a third limiting portion and a fourth limiting portion, the first limiting portion movably abuts against the third limiting portion, and the second limiting portion movably abuts against the fourth limiting portion.

[0012] In the above-mentioned locking mechanism for the middle and large armrest behind the second row of automobile seats, the lock housing assembly is provided with a gasket, which has a first assembly hole and a second assembly hole, the first assembly hole is connected to the fixed seat, and the second assembly hole is connected to the connecting shaft, so that one side of the gasket is in contact with the lock cover, and the other side of the gasket is in contact with the elastic member and the pawl.

[0013] In the above-mentioned locking mechanism for the middle and large armrest behind the second row of automobile seats, the fastener includes a plurality of hollow rivets and a number of bolts corresponding to the plurality of hollow rivets, the lock housing and the lock cover are connected by hollow rivets, one of the hollow rivets is inserted with the gasket, the elastic member and the fixing seat and is connected to the lock housing, and the bolt passes through the hollow rivet and is connected to the metal frame of the armrest.

[0014] In the above-mentioned locking mechanism for the middle and large armrest behind the second row of automobile seats, a positioning block is arranged on the lock cover, a positioning hole is opened on the lock housing, and the positioning block is movably inserted in the positioning hole.

[0015] Compared with the prior art, the utility model has the advantage that the ratchet and the pawl are both made by an integrated cold heading process, which successfully eliminates the matching clearance between the two and the shaft (the ratchet and the mounting shaft and the pawl and the connecting shaft), greatly improving the stability and reliability of the mechanism in the locked state. The advantage of this design is that in mass production, there will be no problems such as excessive clearance and shaking between the large armrest and the seat back caused by the accumulation of part tolerances, thereby effectively improving the user's comfort during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the locking mechanism for the middle and large armrest at the rear of the second row of car seats;

[0017] Figure 2 This is a structural exploded diagram of the locking mechanism for the middle and large armrests behind the second row of car seats;

[0018] Figure 3 This is a structural schematic diagram of the locking mechanism for the middle and large armrest at the rear of the second row of car seats after the lock cover is removed;

[0019] Figure 4 This is a structural schematic diagram of the locking mechanism of the middle and large armrest at the rear of the second row of automobile seats in a locked state;

[0020] Figure 5 The present invention is a structural schematic diagram of a locking mechanism for a middle and large armrest at the rear of a second row of automobile seats in an unlocked state.

[0021] In the figure,

[0022] 1. Lock housing assembly; 100. Lock housing; 101. Lock cover; 102. Elastic member; 103. Fixed seat; 104. Zipper fixing block; 105. Third limiting portion; 106. Fourth limiting portion; 107. Gasket; 108. First assembly hole; 109. Second assembly hole; 110. Hollow rivet; 111. Bolt; 112. Positioning block; 113. Positioning hole; 114. Bushing;

[0023] 2. pawl; 200. connecting shaft; 201. locking portion; 202. first connecting portion;

[0024] 3. Ratchet; 300. Mounting shaft; 301. Locking groove; 302. First limiting portion; 303. Second limiting portion. DETAILED DESCRIPTION

[0025] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0026] like Figures 1 to 5 As shown, the locking mechanism for the middle and large armrest at the rear of the second row of automobile seats comprises: a lock housing assembly 1, a pawl 2 and a ratchet wheel 3.

[0027] The lock housing assembly 1 is mainly composed of a lock housing 100 and a lock cover 101. The lock cover 101 is connected to the lock housing 100 through a fastener and is connected to an externally arranged handrail metal frame. An elastic member 102 is arranged on the lock housing 100. In the present embodiment, the elastic member 102 is arranged as a coil spring, but is not limited to a coil spring and can also be changed according to a preset situation. The function of the elastic member 102 is to provide the necessary restoring force. The ratchet 3 is formed with a connecting shaft 200 by an integral cold heading method. The connecting shaft 200 is movably inserted into the lock housing 100, so that the pawl 2 can be rotatably arranged on the lock housing 100. The connecting shaft 200 can be flexibly inserted into the lock housing 100 so that the pawl 2 can rotate freely inside the lock housing 100, and is movably connected with the pawl 2 through the elastic member 102. The ratchet 3 itself is located inside the lock housing 100 and is tightly meshed with the pawl 2, ensuring the precise execution of the locking and unlocking actions. The mounting shaft 300 on the ratchet 3 is also an integrated structure, one end of which passes through the lock cover 101 and is movably connected to the metal frame of the armrest, and the other end passes through the lock housing 100 and is fixed to the car seat, thereby firmly integrating the entire locking mechanism into the seat system. The ratchet 3 and the pawl 2 are formed by integrated cold heading, eliminating the clearance between the ratchet 3, the pawl 2 and the shaft, thereby improving the stability in the locked state, so that the armrest will not have clearance shaking.

[0028] It is worth mentioning that a shaft sleeve 104 is sleeved on the installation shaft 300, and the shaft sleeve 104 plays a fixing role to prevent the installation shaft 300 and the ratchet 3 on the installation shaft 300 from positional displacement.

[0029] Specifically, a fixing seat 103 is provided on the lock housing 100 , and the elastic member 102 is sleeved on the fixing seat 103 . One end of the elastic member 102 is engaged with the fixing seat 103 , and the other end of the elastic member 102 is movably abutted against the pawl 2 .

[0030] A fixing seat 103 is provided on the lock housing 100 . The elastic member 102 is sleeved in the fixing seat 103 , with one end snapped onto the fixing seat 103 and the other end abutting against the pawl 2 , forming an effective elastic feedback mechanism.

[0031] Furthermore, a zipper fixing block 104 is disposed on the end of the lock housing 100 away from the lock cover 101 , and the connecting shaft 200 passes through the fixing seat 103 and the lock housing 100 is connected to the zipper fixing block 104 .

[0032] The zipper fixing block 104 is disposed at one end of the lock housing 100 away from the lock cover 101 , and is connected to the zipper fixing block 104 after penetrating the fixing seat 103 and the lock housing 100 through the connecting shaft 200 , thereby realizing the driving function of the pawl 2 during the zipper operation.

[0033] Furthermore, the pawl 2 is provided with a locking portion 201 and a first connecting portion 202 , the ratchet 3 is provided with a locking groove 301 , the first connecting portion 202 movably abuts against the elastic member 102 , and the locking portion 201 movably abuts against the locking groove 301 .

[0034] The pawl 2 is provided with a locking portion 201 and a first connecting portion 202, which corresponds to the locking groove 301 on the ratchet 3. When the zipper pulls the zipper fixing block 104, the first connecting portion 202 contacts the elastic member 102 to generate pressure, and the locking portion 201 of the pawl 2 is disengaged from the locking groove 301 of the ratchet 3, thereby achieving an unlocked state, and the armrest metal frame can rotate relative to the seat frame. When the armrest metal frame is reset and rotated relative to the seat frame, the ratchet 3 will push against the locking portion 201 of the pawl 2, so that the locking portion 201 is returned to the locking groove by the force of the elastic member 102, thereby achieving a locked state.

[0035] Furthermore, the ratchet 3 is provided with a first limiting portion 302 and a second limiting portion 303, and the lock housing 100 is provided with a third limiting portion 105 and a fourth limiting portion 106, the first limiting portion 302 and the third limiting portion 105 are movably abutted, and the second limiting portion 303 and the fourth limiting portion 106 are movably abutted.

[0036] The ratchet 3 and the lock housing 100 are respectively provided with a first limiting portion 302, a second limiting portion 303, a third limiting portion 105, and a fourth limiting portion 106 that cooperate with each other. When the ratchet 3 and the pawl 2 are in the locked state, the locking portion 201 abuts against the locking groove 301, and at the same time the first limiting portion 302 and the third limiting portion 105 abut together. When the armrest is flipped to a specific angle, the second limiting portion 303 and the fourth limiting portion 106 abut together, restricting the armrest from continuing to rotate, thereby ensuring the safety and reliability of the locked state.

[0037] Specifically, the lock housing assembly 1 is provided with a gasket 107, which has a first assembly hole 108 and a second assembly hole 109. The first assembly hole 108 is connected to the fixing seat 103, and the second assembly hole 109 is connected to the connecting shaft 200, so that one side of the gasket 107 is in contact with the lock cover 101, and the other side of the gasket 107 is in contact with the elastic member 102 and the pawl 2.

[0038] When the lock cover 101 and the lock shell 100 are fitted together, a cavity is formed, and the ratchet 3, the pawl 2, the elastic member 102 and the fixing seat 103 are all in the cavity. In order to ensure that the pawl 2 and the elastic member 102 do not move along the width direction of the shell in the cavity, a gasket 107 is further provided inside the lock shell assembly 1. The gasket 107 has a first assembly hole 108 and a second assembly hole 109. The first assembly hole 108 and the second assembly hole 109 are respectively connected to the fixing seat 103 and the connecting shaft 200, so that one side of the gasket 107 can fit the lock cover 101, and the other side of the gasket 107 can fit the elastic member 102 and the pawl 2.

[0039] Furthermore, the fasteners include a plurality of hollow rivets 110 and a number of bolts 111 corresponding to the plurality of hollow rivets 110 . The lock housing 100 and the lock cover 101 are connected via the hollow rivets 111 . The bolts 111 are provided on the lock housing 100 . The bolts 111 penetrate the hollow rivets 110 and are connected to the metal frame of the handrail.

[0040] Hollow rivets 110 and bolts 111 are used for fastening during the assembly process. In the present embodiment, one end of one of the hollow rivets 110 is connected to the lock cover 101, and the other end of the hollow rivet 110 passes through the gasket 107, the elastic member 102 and the fixing seat 103 to be connected to the lock housing 100, and the lock housing 100 is fixed to the metal frame of the armrest with bolts 111, thereby ensuring the overall stability and durability of the locking mechanism.

[0041] Specifically, a positioning block 112 is disposed on the lock cover 101 , a positioning hole 113 is opened on the lock housing 100 , and the positioning block 112 is movably inserted into the positioning hole 113 .

[0042] In order to ensure the assembly accuracy and the relative position relationship between the components remains unchanged, at least one positioning block 112 is particularly provided on the lock cover 101. This positioning block 112 is a key alignment component, which can play a guiding and limiting role during the installation and disassembly process. At the same time, a corresponding positioning hole 113 is provided on the lock housing 100 that matches it. When assembling the locking mechanism, the positioning block 112 can be flexibly inserted into the positioning hole 113 on the lock housing 100. The two are precisely docked through this plug-in method, ensuring the tight fit and accurate alignment between the lock cover 101 and the lock housing 100. This movable plug-in structure not only simplifies the assembly process and reduces the difficulty of assembly, but also greatly improves the assembly accuracy and consistency of the product, effectively avoiding problems such as unstable operation or functional failure caused by assembly errors, thereby improving the reliability and durability of the entire armrest locking system.

[0043] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0044] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A locking mechanism for a large rear armrest in the second row of automobile seats, characterized in that: include: A lock housing assembly, the lock housing assembly comprising a lock housing, a lock cover and a fastener, the lock housing and the lock cover being connected to an externally arranged handrail metal frame via the fastener, and an elastic member being arranged on the lock housing; A pawl, wherein a connecting shaft is arranged on the pawl, wherein the connecting shaft and the pawl are integrally formed, and wherein the connecting shaft is movably inserted into the lock housing, so that the pawl is rotatably arranged on the lock housing, and the pawl is movably connected to the elastic member; A ratchet, wherein the ratchet is located on the lock housing and is movably engaged with the pawl, a mounting shaft is provided on the ratchet, the mounting shaft and the ratchet are integrally formed, one end of the mounting shaft passes through the lock cover and is movably connected to the armrest metal frame, and the other end of the mounting shaft passes through the lock housing and is fixedly connected to an externally arranged car seat.

2. The locking mechanism for the middle and large armrests at the rear of the second row of automobile seats according to claim 1, characterized in that: A fixing seat is arranged on the lock housing, the elastic member is sleeved on the fixing seat, one end of the elastic member is clamped with the fixing seat, and the other end of the elastic member is movably abutted against the pawl.

3. The locking mechanism for the rear middle and large armrest of the second row of automobile seats according to claim 2, characterized in that: A zipper fixing block is arranged on the end of the lock housing away from the lock cover, and the connecting shaft passes through the fixing seat and the lock housing is connected with the zipper fixing block.

4. The locking mechanism for the middle and large armrests at the rear of the second row of automobile seats according to claim 2, characterized in that: The pawl is provided with a locking portion and a first connecting portion, the ratchet is provided with a locking groove, the first connecting portion movably abuts against the elastic member, and the locking portion movably abuts against the locking groove.

5. The locking mechanism for the middle and large armrests at the rear of the second row of automobile seats according to claim 4, characterized in that: The ratchet is provided with a first limiting portion and a second limiting portion, and the lock housing is provided with a third limiting portion and a fourth limiting portion, the first limiting portion movably abuts against the third limiting portion, and the second limiting portion movably abuts against the fourth limiting portion.

6. The locking mechanism for the middle and large armrests at the rear of the second row of automobile seats according to claim 2, characterized in that: The lock housing assembly is provided with a gasket, which has a first assembly hole and a second assembly hole. The first assembly hole is connected to the fixing seat, and the second assembly hole is connected to the connecting shaft, so that one side of the gasket is in contact with the lock cover, and the other side of the gasket is in contact with the elastic member and the pawl.

7. The locking mechanism for the middle and large armrests at the rear of the second row of automobile seats according to claim 6, characterized in that: The fasteners include a plurality of hollow rivets and a number of bolts corresponding to the number of the hollow rivets. The lock housing and the lock cover are connected via the hollow rivets. The bolts penetrate the hollow rivets and are connected to the metal frame of the handrail.

8. The locking mechanism for the middle and large armrests at the rear of the second row of automobile seats according to claim 1, characterized in that: The lock cover is provided with a positioning block, the lock housing is provided with a positioning hole, and the positioning block is movably inserted in the positioning hole.

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