Manually adjustable slide rail locking and unlocking mechanism

Abstract

This invention discloses a manually adjustable sliding rail locking and unlocking mechanism. A downward-facing notch is provided in the lower sliding rail as a slot. A resilient toothed plate serves as the locking and unlocking actuator for the upper and lower sliding rails. The elasticity of the toothed plate presses the teeth into the slot, locking the lower and upper sliding rails. An operating component applies downward pressure to the front end of the locking plate to disengage the teeth from the slot, unlocking the lower and upper sliding rails. This mechanism features a novel and simple structure with high reliability. Furthermore, by using an operating handle as the operating component and adding a lower and upper silencing pad to the locking plate, this invention effectively reduces noise during the locking and unlocking processes of the lower and upper sliding rails, preventing abnormal noises caused by the operating handle colliding with the lower and upper sliding rails, the toothed plate, and other metal components during the adjustment of their relative positions.

Description

Technical Field

[0001] The invention relates to a manually adjustable slide rail locking and unlocking mechanism, which is used for a car seat and a car seat slide rail. Background Art

[0002] With the rapid development of automobile technology and the continuous improvement of user experience requirements, new requirements have been put forward for the comfort of car seat slide adjustment. The slide mechanism is an important component of the car seat, and its comfort is extremely important.

[0003] When adjusting the current slide rail mechanism, the adjusting actuator and the fixing member often collide to generate abnormal noise, which affects the quiet environment of the passengers in the vehicle.

[0004] In order to achieve their functions, most of the manually adjustable slide rail mechanisms on the market are complex in structure and have many components, which to a certain extent increases the requirements for the process, is not conducive to the processing and manufacturing of the slide rail mechanism, and also increases the production cost.

[0005] The manual adjustment slide mechanism should have a certain pre-pressure on the operating handle when operating the control handle and in static state to prevent the operating handle from moving due to the bumps of the car during driving and causing collision with other components and producing abnormal noise. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a manually adjustable slide rail locking and unlocking mechanism to solve the problem that the existing manually adjustable car seat slide rails make abnormal noises during the adjustment process and the vehicle driving process.

[0007] To solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0008] A manually adjustable slide rail locking and unlocking mechanism comprises a lower slide rail and an upper slide rail that slide forward and backward with each other, and an operating component and an execution component that are both arranged in the inner cavity of the upper slide rail;

[0009] Features:

[0010] At least one of the left side and the right side of the lower sliding rail is provided with a plurality of slots arranged at intervals along the front-to-back direction, and the slots are notches with openings facing downwards;

[0011] The actuator assembly is provided with an elastic tooth plate, the tooth plate is provided with a locking plate segment, the side surface of the front end of the locking plate segment is provided with a latching tooth, and the rear end of the locking plate segment is fixed to the top surface of the upper slide rail;

[0012] The operating component can apply or cancel the downward pressing force to the front end of the locking plate segment, so that: when the downward pressing force is canceled, the latch tooth is pressed into the latch groove of the lower slide rail under the elastic force of the tooth plate itself, and when the downward pressing force is applied, the latch tooth disengages from the latch groove of the lower slide rail under the action of the pressing force.

[0013] Preferably, the elastic tooth plate is a spring steel plate.

[0014] Preferably, the rear end of the locking plate segment is fixed to the top surface of the upper slide rail via a toothed plate fixing pin.

[0015] As a preferred embodiment of the present invention: the actuator is further provided with a lower sound-absorbing pad, which is fixedly mounted on the top surface of the front end of the locking plate segment;

[0016] The operating assembly is provided with an operating handle and an upper noise-absorbing pad; the middle part of the operating handle is rotatably installed in the upper slide rail through a rotating shaft pin, the front end of the operating handle serves as a manipulating end, the rear end of the operating handle is located above the lower noise-absorbing pad, and the upper noise-absorbing pad is fixedly installed on the inner side of the top surface of the upper slide rail and is located above the rear end of the operating handle, so that: when the front end of the operating handle is subjected to an upward force, the operating handle is driven to rotate clockwise around the rotating shaft pin, so that the rear end of the operating handle applies the downward pressing force to the front end of the locking plate section through the lower noise-absorbing pad; when the operating handle rotates counterclockwise around the rotating shaft pin, the rear end of the operating handle touches the upper noise-absorbing pad.

[0017] Preferably, the upper sound-absorbing pad is fixedly mounted on the inner side of the top surface of the upper slide rail by sound-absorbing fixing nails.

[0018] As a preferred embodiment of the present invention: the operating assembly is also provided with a spring sheet; the operating handle is provided with a protrusion at a position between the front end and the middle part thereof, one end of the spring sheet is fixedly mounted on the top surface of the upper slide rail, and the other end of the spring sheet is pressed downward on the top surface of the protrusion, so that: under the downward pressure of the spring sheet on the protrusion, the rear end of the operating handle is pressed upward on the upper sound-absorbing pad.

[0019] Wherein, preferably: when the rear end portion of the operating handle touches the upper sound-absorbing pad, the rear end portion of the operating handle is clamped between the lower sound-absorbing pad and the upper sound-absorbing pad.

[0020] Among them, preferably: the lower sound-absorbing pad and the upper sound-absorbing pad are rubber or silicone.

[0021] Preferably, the end of the spring sheet is clamped and fixed to the top surface of the upper slide rail by a spring sheet fixing pin and a restraining bracket.

[0022] As a preferred embodiment of the present invention: the tooth plate is further provided with a limiting plate section extending upward from the front end of the locking plate section, and the limiting plate section is provided with a through hole, and the upper end of the limiting plate section is provided with a hook portion; the top surface of the upper slide rail is provided with a limiting hole, the limiting plate section is located in the limiting hole and can move up and down, the hook portion is located above the top surface of the upper slide rail, and the size of the limiting hole is not enough for the hook portion to pass through;

[0023] The rear end of the operating handle passes through the through hole of the limiting plate section and extends to the top of the lower sound-absorbing pad.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] First, the present invention sets a notch with an opening facing downward as a slot on the lower slide rail, and adopts an elastic tooth plate as an actuator for locking and unlocking the upper and lower slide rails. The elasticity of the tooth plate is used to press its teeth into the slot to achieve locking of the lower and upper slide rails, and the operating component can apply downward pressing force to the front end of the locking plate section to drive the teeth to disengage from the slot, thereby unlocking the lower and upper slide rails. Therefore, the present invention has the advantages of simple and novel structure and high reliability.

[0026] Second, the present invention adopts an operating handle rotatably mounted in the upper slide rail as an operating component, and a lower sound-absorbing pad is added to the top surface of the front end of the locking plate segment, and cooperates with the present invention to use the latching teeth to move up and down by relying on the elasticity of the tooth plate to realize the locking and unlocking mode of engaging and separating with the downward opening slot, so that during the unlocking process, the operating handle and the tooth plate are in contact through the lower sound-absorbing pad without directly colliding, thereby achieving a sound-absorbing effect in the unlocking process;

[0027] In addition, the present invention adds a lower silencer pad to the actuator assembly, and adopts an operating assembly provided with an operating handle and an upper silencer pad, and uses the operating handle to apply a downward pressing force to the front end of the locking plate segment through the lower silencer pad to drive the latching teeth to move downward, and cooperates with the present invention to use the latching teeth to move up and down by relying on the elasticity of the tooth plate to achieve a locking and unlocking mode of engaging and separating with the downward opening slot, so that during the locking process, the operating handle touches the upper silencer pad instead of directly colliding with the upper slide rail, thereby achieving a silencer effect during the locking process;

[0028] Therefore, the present invention can achieve a silencing effect on the unlocking and locking processes of the lower and upper slide rails, thereby avoiding the problem of abnormal noise caused by the operating handle colliding with metal parts such as the lower and upper slide rails, the upper slide rail, and the tooth plate during the process of adjusting the relative positions of the upper and lower slide rails.

[0029] Third, the present invention adds a spring sheet to the operating assembly, and uses the spring sheet to apply a downward pressure force to the convex block of the operating handle, so that the rear end of the operating handle is pressed upward on the upper noise-absorbing pad, so that after the user releases the front end of the operating handle in the unlocked state, the operating handle can automatically reset by releasing the deformation increased during the unlocking process by the spring sheet, so that the present invention can automatically return from the unlocked state to the locked state;

[0030] Furthermore, since the protrusion and the rear end of the operating handle are respectively pressed by the spring sheet and the upper silencer pad and cannot rotate in the locked state, the present invention can also prevent the operating handle from moving due to the bumps of the vehicle during driving and causing collision with metal parts such as the lower slide rail, the upper slide rail, the tooth plate, etc., thereby causing abnormal noise.

[0031] Fourthly, the present invention adds a limiting plate segment to the tooth plate and a limiting hole to the upper slide rail, and utilizes the limiting effect of the limiting hole on the hook part to limit the maximum downward movement range of the front end of the locking plate segment.

[0032] Fifth, the present invention has the advantages of simple structure, small number of components, low processing technology requirements and low production cost.

[0033] Sixth, the present invention can be applied to most car seats and slide rail mechanisms on the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0035] Figure 1 is the general assembly diagram of the present invention;

[0036] Figure 2 It is a schematic diagram of the structure explosion of the present invention;

[0037] Figure 3 It is a longitudinal cross-sectional schematic diagram of the present invention;

[0038] Figure 4 is a cross-sectional schematic diagram of the present invention in a locked state;

[0039] Figure 5 It is a cross-sectional schematic diagram of the present invention in an unlocked state. DETAILED DESCRIPTION

[0040] The present invention is described in detail below in conjunction with the embodiments and the accompanying drawings to help those skilled in the art better understand the inventive concept of the present invention. However, the protection scope of the claims of the present invention is not limited to the following embodiments. For those skilled in the art, all other embodiments obtained without creative work without departing from the inventive concept of the present invention belong to the protection scope of the present invention.

[0041] In the description of the present invention, it should be clarified that the directional terms "up, down, front, back, left, right, top, bottom, clockwise, counterclockwise" are only relative concepts in terms of direction. They are for the convenience of describing the present invention or simplifying the description, rather than indicating or implying a specific direction that the present invention must have. Therefore, they cannot be understood as limitations on the present invention.

[0042] Embodiment 1

[0043] like Figures 1 to 5 As shown, the present invention discloses a manually adjustable slide rail locking and unlocking mechanism, comprising a lower slide rail 1 and an upper slide rail 2 that slide forward and backward with each other, and an operating component and an execution component that are both arranged in the inner cavity of the upper slide rail 2;

[0044] At least one of the left and right sides of the lower slide rail 1 is provided with a plurality of slots 1a arranged at intervals along the front-to-back direction, and the slots 1a are notches with openings facing downwards;

[0045] The actuator assembly is provided with an elastic tooth plate 3, the tooth plate 3 is provided with a locking plate segment 3-1, a front end portion 3-1a of the locking plate segment 3-1 is provided with a latching tooth 3-2 on the side, and a rear end portion 3-1b of the locking plate segment 3-1 is fixed to the top surface of the upper slide rail 2;

[0046] The operating component can apply or cancel the downward pressing force to the front end portion 3-1a of the locking plate segment 3-1, so that: when the downward pressing force is canceled, the latch tooth 3-2 is pressed into the latch groove 1a of the lower slide rail 1 under the elastic force of the tooth plate 3 itself, so that the latch tooth 3-2 is engaged with the latch groove 1a, and the front and rear relative movement of the lower slide rail 1 and the upper slide rail 2 is restricted. At this time, the manually adjustable slide rail locking and unlocking mechanism of the present invention is in a locked state; when the downward pressing force is applied, the latch tooth 3-2 overcomes the elastic force of the tooth plate 3 itself under the action of the pressing force and disengages from the latch groove 1a of the lower slide rail 1, and the lower slide rail 1 and the upper slide rail 2 can move relative to each other front and rear. At this time, the manually adjustable slide rail locking and unlocking mechanism of the present invention is in an unlocked state.

[0047] Therefore, when the user needs to adjust the front-to-back relative position between the lower slide rail 1 and the upper slide rail 2, the user manually operates the operating component to apply a downward pressing force to the front end portion 3-1a of the locking plate segment 3-1, so that the manually adjustable slide rail locking and unlocking mechanism of the present invention enters an unlocking state. While maintaining the pressing force, the user can adjust the front-to-back relative position between the lower slide rail 1 and the upper slide rail 2.

[0048] After completing the front and rear relative position adjustment, the user controls the operating component to cancel the downward pressing force, and the tooth plate 3 can rebound by relying on its own elasticity, so that the locking tooth 3-2 is pressed back into the slot 1a of the lower slide rail 1, so that the manually adjustable slide rail locking and unlocking mechanism of the present invention automatically returns to the locked state.

[0049] The above is a basic implementation of the first embodiment of the present invention, and further optimization, improvement and limitation can be made on the basis of the basic implementation:

[0050] Preferably, the elastic tooth plate 3 is a spring steel plate.

[0051] Preferably, the rear end portion 3 - 1 b of the locking plate segment 3 - 1 is fixed to the top surface of the upper slide rail 2 via a toothed plate fixing pin 4 .

[0052] Embodiment 2

[0053] On the basis of the above-mentioned embodiment 1, this embodiment 2 also adopts the following preferred implementation manner:

[0054] The actuator assembly is also provided with a lower sound-absorbing pad 7, which is fixedly mounted on the top surface of the front end portion 3-1a of the locking plate segment 3-1;

[0055] The operating assembly is provided with an operating handle 5 and an upper silencer pad 8; the middle portion 5-1 of the operating handle 5 is rotatably installed in the upper slide rail 2 through a rotating shaft pin 6, the front end portion 5-2 of the operating handle 5 serves as a manipulation end, the rear end portion 5-3 of the operating handle 5 is located above the lower silencer pad 7, and the upper silencer pad 8 is fixedly installed on the inner side of the top surface of the upper slide rail 2 and is located above the rear end portion 5-3 of the operating handle 5, so that: when the front end portion 5-2 of the operating handle 5 is subjected to an upward force, the operating handle 5 is driven to rotate clockwise around the rotating shaft pin 6, and the rear end portion 5-3 of the operating handle 5 applies the downward pressing force to the front end portion 3-1a of the locking plate segment 3-1 through the lower silencer pad 7 through the lever action; when the operating handle 5 rotates counterclockwise around the rotating shaft pin 6, the rear end portion 5-3 of the operating handle 5 touches the upper silencer pad 8.

[0056] Thus, by lifting the front end portion 5-2 of the operating handle 5 upward, the user can drive the rear end portion 5-3 of the operating handle 5 to apply downward pressing force to the front end portion 3-1a of the locking plate segment 3-1 through the lower sound-absorbing pad 7, so as to unlock the lower slide rail 1 and the upper slide rail 2 and enter the unlocking state. In the unlocking process, since the operating handle 5 and the toothed plate 3 are in contact through the lower sound-absorbing pad 7 without directly colliding, the noise reduction effect of the unlocking process can be achieved;

[0057] After the front-to-rear relative position adjustment between the lower slide rail 1 and the upper slide rail 2 is completed in the unlocked state, the downward pressing force applied to the front end portion 3-1a of the locking plate segment 3-1 can be cancelled by rotating the operating handle 5 counterclockwise around the rotating shaft pin 6, and the tooth plate 3 rebounds by relying on its own elasticity, so that the locking tooth 3-2 is pressed back into the locking groove 1a of the lower slide rail 1, so as to lock the lower slide rail 1 and the upper slide rail 2 and re-enter the locked state. In this locking process, since the rear end portion 5-3 of the operating handle 5 touches the upper silencer pad 8 instead of directly colliding with the upper slide rail 2 when rotating counterclockwise, it can achieve a silencer effect in the locking process.

[0058] The above is a basic implementation of the second embodiment, and further optimization, improvement and limitation can be made on the basis of the basic implementation:

[0059] Preferably, the upper sound-absorbing pad 8 is fixedly mounted on the inner side of the top surface of the upper slide rail 2 by means of sound-absorbing fixing nails 12 .

[0060] Embodiment 3

[0061] On the basis of the above-mentioned embodiment 2, this embodiment 3 also adopts the following preferred implementation manner:

[0062] The operating assembly is also provided with a spring sheet 9; the operating handle 5 is provided with a protrusion 5-4 at a position between its front end portion 5-2 and the middle portion 5-1, one end portion of the spring sheet 9 is fixedly mounted on the top surface of the upper slide rail 2, and the other end portion of the spring sheet 9 is pressed downward on the top surface of the protrusion 5-4, so that: under the downward pressure of the spring sheet 9 on the protrusion 5-4, the rear end portion 5-3 of the operating handle 5 is pressed upward on the upper silencer pad 8 through the lever action.

[0063] Thus, when the user lifts the front end portion 5-2 of the operating handle 5 upward to unlock the lower slide rail 1 and the upper slide rail 2, the front end portion 5-2 of the operating handle 5 needs to overcome the elastic force of the spring sheet 9 and move upward, and the deformation amount of the spring sheet 9 increases during this process;

[0064] After the front-to-rear relative position adjustment between the lower slide rail 1 and the upper slide rail 2 is completed in the unlocked state, the user releases the front end 5-2 of the operating handle 5, so that the deformation of the spring piece 9 increased during the unlocking process is released, so as to drive the operating handle 5 to rotate counterclockwise around the rotating shaft pin 6, thereby realizing the automatic resetting of the operating handle 5, so as to cancel the downward pressing force applied by the rear end 5-3 of the operating handle 5 to the front end 3-1a of the locking plate section 3-1 through the lower silencer pad 7, so that the tooth plate 3 can rebound by its own elasticity, and the latch tooth 3-2 is pressed again into the latch groove 1a of the lower slide rail 1, so that the manually adjustable slide rail locking and unlocking mechanism of the present invention automatically returns to the locked state.

[0065] Furthermore, when in the locked state, if the vehicle to which the present invention is applied starts to move, the operating handle 5 cannot rotate because its protrusion 5-4 and rear end portion 5-3 are respectively pressed by the spring sheet 9 and the upper silencer pad 8. Therefore, the present invention can prevent the operating handle 5 from moving due to the bumps of the vehicle during driving, causing collisions with metal parts such as the lower slide rail 1, the upper slide rail 2, and the tooth plate 3, thereby causing abnormal noises and damage to the mechanism parts.

[0066] The above is a basic implementation of the third embodiment, and further optimization, improvement and limitation can be made on the basis of the basic implementation:

[0067] Preferably, when the rear end portion 5 - 3 of the operating handle 5 touches the upper sound-absorbing pad 8 , the rear end portion 5 - 3 of the operating handle 5 is clamped between the lower sound-absorbing pad 7 and the upper sound-absorbing pad 8 , so as to enhance the stability of the operating handle 5 in the locked state.

[0068] Preferably, the lower sound-absorbing pad 7 and the upper sound-absorbing pad 8 can be any soft non-metallic material that is elastic and can play a buffering role. In this embodiment, the lower sound-absorbing pad 7 and the upper sound-absorbing pad 8 are preferably made of rubber or silicone.

[0069] Preferably, the end of the spring sheet 9 is clamped and fixed to the top surface of the upper slide rail 2 through a spring sheet fixing pin 10 and a restraining bracket 11 .

[0070] Embodiment 4

[0071] On the basis of the above-mentioned embodiment 2 or embodiment 3, this embodiment 4 also adopts the following preferred implementation manner:

[0072] The tooth plate 3 is also provided with a limit plate segment 3-3 extending upward from the front end portion 3-1a of the locking plate segment 3-1, and the limit plate segment 3-3 is provided with a through hole 3-3a, and the upper end of the limit plate segment 3-3 is provided with a hook portion 3-4; the top surface of the upper slide rail 2 is provided with a limit hole 2a, the limit plate segment 3-3 is located in the limit hole 2a and can move up and down, the hook portion 3-4 is located above the top surface of the upper slide rail 2, and the size of the limit hole 2a is not enough for the hook portion 3-4 to pass through;

[0073] The rear end portion 5 - 3 of the operating handle 5 passes through the through hole 3 - 3 a of the limiting plate segment 3 - 3 and extends to the top of the lower sound-absorbing pad 7 .

[0074] Thus, by utilizing the limiting effect of the limiting hole 2a on the hook portion 3-4, the maximum downward movement range of the front end portion 3-1a of the locking plate segment 3-1 can be limited, thereby preventing the tooth plate 3 from being deformed too much due to excessive pressing, resulting in failure to rebound or even breakage, thereby improving the safety and reliability of the present invention.

[0075] in addition:

[0076] The lower rail 1 and the upper rail 2 that slide forward and backward with each other in the present invention can be any structure in the prior art. In the embodiment of the present invention, the following structure is preferably used: Figure 4 and Figure 5 Two upper elastic shaft pins 13 and two lower elastic shaft pins 14 are used to maintain the relative position of the lower slide rail 1 and the upper slide rail 2, and multiple balls 15 are installed at both ends of each upper elastic shaft pin 13 and the two lower elastic shaft pins 14 to achieve sliding fit between the lower slide rail 1 and the upper slide rail 2.

[0077] When the present invention is applied to a vehicle, the lower slide rail 1 should be fixed to the vehicle body, and the upper slide rail 2 should be connected to the vehicle seat; and in order to enhance the strength of the lower slide rail 1 as a fixing member, the front end and the rear end of the bottom of the lower slide rail 1 can be welded and fixed to the vehicle body through a front end reinforcement plate 17 and a rear end reinforcement plate 16 respectively.

[0078] The present invention is not limited to the above-mentioned specific implementation modes. According to the above-mentioned contents, in accordance with the common technical knowledge and customary means in the field, without departing from the above-mentioned basic technical ideas of the present invention, the present invention can also make other various forms of equivalent modifications, replacements or changes, all of which fall within the protection scope of the present invention.

Claims

1. A manually adjustable slide rail locking and unlocking mechanism, comprising a lower slide rail (1) and an upper slide rail (2) that slide forward and backward with each other, and an operating component and an execution component both arranged in the inner cavity of the upper slide rail (2); Features: At least one of the left and right sides of the lower sliding rail (1) is provided with a plurality of slots (1a) arranged at intervals along the front-to-back direction, and the slots (1a) are notches with openings facing downwards; The actuator assembly is provided with an elastic tooth plate (3), the tooth plate (3) is provided with a locking plate segment (3-1), a front end portion (3-1a) of the locking plate segment (3-1) is provided with a latching tooth (3-2) on the side surface, and a rear end portion (3-1b) of the locking plate segment (3-1) is fixed to the top surface of the upper slide rail (2); The operating component can apply or cancel a downward pressing force to the front end portion (3-1a) of the locking plate segment (3-1), so that: when the downward pressing force is canceled, the latching tooth (3-2) is pressed into the latching groove (1a) of the lower slide rail (1) under the elastic force of the tooth plate (3) itself; when the downward pressing force is applied, the latching tooth (3-2) is disengaged from the latching groove (1a) of the lower slide rail (1) under the action of the pressing force; The actuator assembly is also provided with a lower sound-absorbing pad (7), which is fixedly mounted on the top surface of the front end portion (3-1a) of the locking plate segment (3-1); The operating assembly is provided with an operating handle (5) and an upper sound-absorbing pad (8); the middle portion (5-1) of the operating handle (5) is rotatably mounted in the upper slide rail (2) via a rotating shaft pin (6); the front end portion (5-2) of the operating handle (5) serves as a manipulation end; the rear end portion (5-3) of the operating handle (5) is located above the lower sound-absorbing pad (7); the upper sound-absorbing pad (8) is fixedly mounted on the inner side of the top surface of the upper slide rail (2) and is located above the rear end portion (5-3) of the operating handle (5), so that : When the front end portion (5-2) of the operating handle (5) is subjected to an upward force, the operating handle (5) is driven to rotate clockwise around the rotating shaft pin (6), so that the rear end portion (5-3) of the operating handle (5) applies the downward pressing force to the front end portion (3-1a) of the locking plate section (3-1) through the lower sound-absorbing pad (7); when the operating handle (5) rotates counterclockwise around the rotating shaft pin (6), the rear end portion (5-3) of the operating handle (5) touches the upper sound-absorbing pad (8); The upper sound-absorbing pad (8) is fixedly mounted on the inner side of the top surface of the upper slide rail (2) via a sound-absorbing fixing nail (12); The operating assembly is also provided with a spring sheet (9); the operating handle (5) is provided with a protrusion (5-4) at a position between the front end portion (5-2) and the middle portion (5-1); one end portion of the spring sheet (9) is fixedly mounted on the top surface of the upper slide rail (2), and the other end portion of the spring sheet (9) is pressed downward on the top surface of the protrusion (5-4), so that: under the downward pressure of the spring sheet (9) on the protrusion (5-4), the rear end portion (5-3) of the operating handle (5) is pressed upward on the upper sound-absorbing pad (8).

2. The manually adjustable slide rail locking and unlocking mechanism according to claim 1, characterized in that: The elastic tooth plate (3) is a spring steel plate.

3. The manually adjustable slide rail locking and unlocking mechanism according to claim 1, characterized in that: The rear end portion (3-1b) of the locking plate segment (3-1) is fixed to the top surface of the upper slide rail (2) via a toothed plate fixing pin (4).

4. The manually adjustable slide rail locking and unlocking mechanism according to claim 1, characterized in that: When the rear end portion (5-3) of the operating handle (5) touches the upper sound-absorbing pad (8), the rear end portion (5-3) of the operating handle (5) is clamped between the lower sound-absorbing pad (7) and the upper sound-absorbing pad (8).

5. The manually adjustable slide rail locking and unlocking mechanism according to claim 1, characterized in that: The lower sound-absorbing pad (7) and the upper sound-absorbing pad (8) are made of rubber or silica gel.

6. The manually adjustable slide rail locking and unlocking mechanism according to claim 1, characterized in that: The end of the spring sheet (9) is clamped and fixed to the top surface of the upper slide rail (2) via a spring sheet fixing pin (10) and a restraining bracket (11).

7. The manually adjustable slide rail locking and unlocking mechanism according to claim 1, characterized in that: The tooth plate (3) is also provided with a limiting plate section (3-3) extending upward from the front end portion (3-1a) of the locking plate section (3-1), and the limiting plate section (3-3) is provided with a through hole (3-3a), and the upper end of the limiting plate section (3-3) is provided with a hook portion (3-4); the top surface of the upper slide rail (2) is provided with a limiting hole (2a), the limiting plate section (3-3) is located in the limiting hole (2a) and can move up and down, the hook portion (3-4) is located above the top surface of the upper slide rail (2), and the size of the limiting hole (2a) is not enough for the hook portion (3-4) to pass through; The rear end portion (5-3) of the operating handle (5) passes through the through hole (3-3a) of the limiting plate section (3-3) and extends to the top of the lower sound-absorbing pad (7).

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