Bolt type rotary unlocking mechanism for armrest of rear seat of automobile

Abstract

The utility model relates to the field of automobile seat parts, and discloses an automobile rear seat armrest bolt type rotary unlocking mechanism which comprises an armrest frame and two armrest bodies rotationally connected to the armrest frame, and the two armrest bodies are arranged on the two sides of the armrest frame respectively. The armrest frame is detachably connected with a pin shaft sleeve, a locking pin is inserted into the pin shaft sleeve, the end part of the locking pin is detachably connected with a pulling cable, the locking pin slides in the pin shaft sleeve under the pulling of the pulling cable, and the end part of the inserting part extends out of the pin shaft sleeve. The locking pin has the following advantages and effects that the locking pin is provided with the inserting part, the sliding part and the driving part, the connecting hole for the driving part to extend out is formed in the end part of the pin shaft sleeve, and the reset spring is compressed in the assembly gap; thrust of the two ends of the reset spring is applied to the sliding section of the locking pin and the radial end face, where the connecting hole is located, of the pin shaft sleeve, no thrust is applied to the end, opposite to the connecting hole, of the pin shaft sleeve, and bending of the pin shaft sleeve is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile seat parts, in particular to a latch-type rotating unlocking mechanism for an automobile rear seat armrest. Background Art

[0002] In order to improve the riding comfort and functionality of passengers, a foldable center armrest is usually provided in the middle position of the rear seat backrest of the car. The rear seat center armrest can be used to place items and facilitate passengers to relax their arms. At the same time, it can be fully folded without taking up extra space in the car.

[0003] In order to ensure safety and prevent the rear center armrest from automatically swinging away and injuring people in the event of an emergency brake, an unlocking mechanism is usually installed. The utility model patent with application number 2018211338528 discloses an unlocking assembly for the rear seat center armrest, which can drive the lock pin to axially extend and retract through the rotation of the sleeve, thereby locking or unlocking the rear center armrest. There are the following problems in use: Due to the long length of the sleeve itself (close to the width of the rear center armrest or the front center armrest box cover), the sleeve is prone to deformation (alienated into an arched structure) after long-term use; in the invention patent with application number 2019110130610, although a sleeve insert is provided in the sleeve to alleviate deformation, the sleeve itself is still too long. When the cable pulls the lock pin to slide inward and contact the sleeve, it will still apply inward pressure to both ends of the sleeve, and long-term use will also cause deformation of the sleeve; and the structure of the inner wall of the sleeve and the outer wall of the lock pin is complex, which also increases the manufacturing cost. Utility Model Content

[0004] The utility model aims to provide a latch-type rotating unlocking mechanism for an armrest of a rear seat of an automobile, which has the effects of simple structure and not being easily deformed.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions: a latch-type rotary unlocking mechanism for an armrest of a rear seat of an automobile, comprising an armrest frame and an armrest body rotatably connected to the armrest frame, the armrest frame being detachably connected to a pin shaft sleeve, a locking pin being inserted in the pin shaft sleeve, a pulling cable being detachably connected to the end of the locking pin, the locking pin sliding in the pin shaft sleeve under the pulling of the pulling cable, the locking pin comprising an inserting portion, a sliding portion and a driving portion respectively along the axial direction, the sliding portion being arranged in the Between the plug-in part and the driving part, the end of the pulling rope is connected to the driving part, the outer wall of the sliding part is in contact with the inner wall of the pin shaft sleeve, an assembly gap is arranged between the outer wall of the driving part and the inner wall of the pin shaft sleeve, the end of the pin shaft sleeve is provided with a connecting hole for the driving part to extend out, the outer wall of the driving part is fitted with the inner wall of the connecting hole, a return spring is sleeved on the driving part and is located in the assembly gap, the end of the plug-in part extends out of the pin shaft sleeve, and the armrest body is provided with a locking hole for the plug-in part to extend into.

[0006] By adopting the above technical solution, when the handrail body and the handrail frame are unlocked, the locking pin is pulled to slide in the pin shaft sleeve so that the locking pin is disengaged from the locking hole, thereby completing the unlocking of the handrail body; when the locking pin is pulled back into the pin shaft sleeve, the return spring is compressed in the assembly gap, and the thrusts at both ends of the return spring are respectively applied to the sliding section of the locking pin and the radial end surface of the connecting hole on the pin shaft sleeve, while no thrust is applied to the end of the pin shaft sleeve opposite to the connecting hole, thereby not causing the bending of the pin shaft sleeve, and at the same time, there is no need to process special-shaped grooves on the outer wall of the locking pin, thereby simplifying the structure of the locking pin and the pin shaft sleeve.

[0007] The utility model is further configured as follows: an annular limiting groove is provided on the outer wall of the driving part, a connecting fastener is provided between the driving part and the pulling cable, the end of the pulling cable is connected to the connecting fastener, an inserting groove is provided on the connecting fastener, and both sides of the inserting groove extend into the annular limiting groove respectively.

[0008] By adopting the above technical solution, the pulling rope is connected to the connecting buckle. When the driving part is connected to the connecting buckle, the end of the driving part is inserted into the plug-in slot, and the two sides of the plug-in slot are extended into the annular limit groove, thereby limiting the axial relative movement of the connecting buckle and the driving part, and realizing the rapid disassembly and assembly of the locking pin and the connecting buckle.

[0009] The utility model is further configured as follows: a locking hole for the pulling rope to pass through is provided on the connecting fastener, one end of the pulling rope passing through the locking hole is fixedly connected to a limiting block, and the limiting block contacts the end of the locking hole to control the pulling rope to move away from the driving part.

[0010] By adopting the above technical solution, when the pulling cable pulls the locking pin to retract the pin shaft sleeve, the pulling cable applies a pulling force to the limit block, the limit block contacts the end face where the lock hole is located and applies a thrust to the end face where the lock hole is located, pushing the connecting buckle and the locking pin to slide away from the locking hole.

[0011] The utility model is further configured as follows: the handrail frame is detachably connected to a steering tube, the pulling rope passes through the steering tube, the handrail frame is fixedly connected to a support plate and a connecting plate respectively located at two ends of the steering tube, the support plate is provided with a support hole for the steering tube to extend out, the connecting plate is provided with a plug-in groove, the steering tube is provided with a limiting ring groove located on the outer wall of the steering tube away from the support plate, and the limiting ring grooves are inserted on both sides of the plug-in groove to limit the movement of the steering tube in a direction perpendicular to the connecting plate.

[0012] By adopting the above technical solution, the pulling cable passes through the steering tube to achieve adjustment of the pulling direction of the pulling cable. When the steering tube is assembled on the handrail frame, one end of the steering tube is passed through the supporting hole, and the other end is inserted into the plug-in groove along the radial direction of the steering tube and the two sides of the plug-in groove are inserted into the limiting ring groove, thereby achieving a detachable connection of the steering tube.

[0013] The utility model is further configured as follows: a fixing sleeve for inserting the pin sleeve is fixedly connected to the handrail frame, a locking protrusion is fixedly connected to the side wall of the pin sleeve, a locking hole is provided on the side wall of the fixing sleeve through which the locking protrusion extends, and a guiding inclined surface is provided on the side wall of the locking protrusion.

[0014] By adopting the above technical solution, when the pin shaft sleeve is connected to the handrail frame, the pin shaft sleeve is inserted into the fixed sleeve so that the locking protrusion extends into the locking hole, thereby realizing axial positioning between the pin shaft sleeve and the fixed sleeve, and the end of the fixed sleeve applies pressure to the locking protrusion in the inner direction of the pin shaft sleeve through the guide bevel.

[0015] The utility model is further configured as follows: a clearance through hole is provided on the side wall of the pin shaft sleeve, and the locking protrusion is fixedly connected to one side of the clearance through hole.

[0016] By adopting the above technical solution, when the pin sleeve is inserted into the fixed sleeve, the end of the fixed sleeve applies pressure toward the inner side of the pin sleeve to the locking protrusion through the guide bevel, so that the locking protrusion bends toward the inner side of the pin sleeve.

[0017] The utility model is further configured as follows: the end of the pin shaft sleeve is fixedly connected with a limiting shoulder, the limiting shoulder contacts the end of the fixed sleeve, a positioning protrusion is fixedly connected with the end surface of the limiting shaft, and the end of the pin shaft sleeve is provided with a positioning groove for the positioning protrusion to be embedded.

[0018] By adopting the above technical solution, the positioning protrusion is embedded in the positioning groove when the pin shaft sleeve is inserted into the fixed sleeve, thereby realizing the circumferential positioning of the pin shaft sleeve and the fixed sleeve, the limiting shaft shoulder contacts with the end of the fixed sleeve, and the locking protrusion contacts with the side of the locking hole away from the connecting hole, thereby axially fixing the limiting sleeve in the fixed sleeve.

[0019] The utility model is further configured as follows: a buffer slope is provided on the driving part and one end of the sliding part is provided with the buffer slope, and the distance between the buffer slope and the central axis of the driving part gradually increases along the direction approaching the sliding part.

[0020] By adopting the above technical solution, when the handrail body and the handrail frame are unlocked, the locking pin is loosened and pulled to slide in the pin shaft sleeve so that the locking pin is disengaged from the locking hole. The buffer slope converts the direct impact between the end face of the sliding part and the end face where the connecting hole is located into a gradually increasing pressure of the buffer slope on the inner wall of the connecting hole, thereby achieving buffering of the sliding of the locking pin.

[0021] The utility model is further configured as follows: a stabilizing ring located at the edge of the connecting hole is fixedly connected in the assembly gap, the driving part passes through the stabilizing ring, and the outer wall of the driving part contacts the inner wall of the stabilizing ring.

[0022] By adopting the above technical solution, a stabilizing ring is provided at the connection hole, thereby increasing the thickness of the connection hole and enhancing the stability of the connection hole.

[0023] The beneficial effects of the utility model are:

[0024] 1. The locking pin is provided with a plug-in portion, a sliding portion and a driving portion, and a connecting hole for the driving portion to extend is provided at the end of the pin shaft sleeve. The return spring is compressed in the assembly gap, and the thrusts at both ends of the return spring are applied to the sliding section of the locking pin and the radial end surface where the connecting hole is located on the pin shaft sleeve, respectively, while no thrust is applied to the end of the pin shaft sleeve opposite to the connecting hole, thereby avoiding the bending of the pin shaft sleeve;

[0025] 2. A buffer slope is provided on the driving part, which converts the direct impact between the end face of the sliding part and the end face where the connecting hole is located into a gradually increasing pressure of the buffer slope on the inner wall of the connecting hole, thereby achieving buffering of the sliding of the locking pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1It is a schematic diagram of the connection relationship of this embodiment.

[0028] Figure 2 It is a schematic diagram of the explosion structure of this embodiment.

[0029] Figure 3 Schematic diagram of the connection relationship of the handrail frame of this embodiment.

[0030] Figure 4 A schematic diagram of the structure of the pin sleeve and the locking pin in this embodiment.

[0031] In the figure, 1, handrail frame; 11, support plate; 111, support hole; 12, connecting plate; 121, plug-in slot; 13, fixing sleeve; 131, locking hole; 132, positioning slot; 2, handrail body; 21, locking hole; 3, pin sleeve; 31, assembly gap; 32, connecting hole; 33, locking convex buckle; 331, guide inclined surface; 34, clearance through hole; 35, limiting shoulder; 36, positioning convex part; 37, stabilizing ring; 4, locking pin; 41, plug-in part; 42, sliding part; 43, driving part; 431, annular limiting groove; 432, buffer inclined surface; 5, pulling rope; 51, connecting fastener; 511, plug-in slot; 512, locking hole; 52, limiting block; 6, reset spring; 7, steering tube; 71, limiting ring groove. DETAILED DESCRIPTION

[0032] The technical solution of the utility model will be described clearly and completely below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Embodiment, a latch-type rotating unlocking mechanism for a rear seat armrest of a vehicle, such as Figure 1 As shown, it includes an armrest frame and an armrest body rotatably connected to the armrest frame, and the armrest body is provided with two armrest bodies respectively provided on both sides of the armrest frame. A pin shaft sleeve is detachably connected to the armrest frame, a locking pin is inserted in the pin shaft sleeve, a pulling rope is detachably connected to the end of the locking pin, the locking pin slides in the pin shaft sleeve under the pull of the pulling rope, and the end of the plug-in portion extends out of the pin shaft sleeve, and a locking hole for the plug-in portion to extend into is provided on the armrest body. When the armrest body and the armrest frame are unlocked, the locking pin is loosened and pulled to slide in the pin shaft sleeve so that the locking pin is disengaged from the locking hole, thereby completing the unlocking of the armrest body.

[0034] like Figure 1 , Figure 2As shown, the locking pin includes an axially-connected plug-in portion, a sliding portion and a driving portion, the sliding portion is arranged between the plug-in portion and the driving portion, the end portion of the pulling rope is connected to the driving portion, the outer wall of the sliding portion is in contact with the inner wall of the pin shaft sleeve, an assembly gap is arranged between the outer wall of the driving portion and the inner wall of the pin shaft sleeve, a connecting hole for the driving portion to extend is arranged at the end of the pin shaft sleeve, the outer wall of the driving portion is fitted with the inner wall of the connecting hole, a return spring is sleeved on the driving portion and is located in the assembly gap, when the locking pin is pulled back into the pin shaft sleeve, the return spring is compressed in the assembly gap, and the thrusts at both ends of the return spring are respectively applied to the sliding section of the locking pin and the radial end face of the pin shaft sleeve where the connecting hole is located, while no thrust is applied to the end of the pin shaft sleeve opposite to the connecting hole, thereby not causing bending of the pin shaft sleeve, and at the same time, there is no need to process a special-shaped groove on the outer wall of the locking pin, thereby simplifying the structure of the locking pin and the pin shaft sleeve.

[0035] like Figure 2 , Figure 4 As shown, an annular limiting groove is provided on the outer wall of the driving part, a connecting fastener is provided between the driving part and the pulling cable, the end of the pulling cable is connected to the connecting fastener, a plug-in groove is provided on the connecting fastener, and both sides of the plug-in groove extend into the annular limiting groove respectively. A lock hole is provided on the connecting fastener for the pulling cable to pass through, and one end of the pulling cable passes through the lock hole and is fixedly connected to a limiting block, and the limiting block contacts the end of the lock hole to prevent the pulling cable from moving away from the driving part.

[0036] like Figure 3 The handrail frame is detachably connected with a steering tube, which is arranged in an L shape, and the pulling cable passes through the steering tube. The handrail frame is fixedly connected with a support plate and a connecting plate respectively located at the two ends of the steering tube, and the support plate is provided with a support hole for the steering tube to extend out, and the connecting plate is provided with a plug-in slot. The end of the steering tube away from the support plate is provided with a limiting ring groove located on the outer wall of the steering tube, and the limiting ring grooves are inserted on both sides of the plug-in slot to limit the movement of the steering tube in a direction perpendicular to the connecting plate. When connecting the pulling cable with the locking pin, the end of the pulling cable without the limiting block is passed through the lock hole and the steering tube in sequence, and the limiting block contacts the end face where the lock hole is located, and one end of the steering tube is passed through the support hole, and the other end is inserted into the plug-in slot along the radial direction of the steering tube, and the two sides of the plug-in slot are inserted into the limiting ring groove, and the end of the driving part is inserted into the plug-in slot, and the two sides of the plug-in slot are extended into the annular limiting groove to realize the detachable connection between the driving part and the connecting buckle.

[0037] like Figure 4 As shown, the handrail frame is fixedly connected with a fixed sleeve for inserting the pin shaft sleeve, the side wall of the pin shaft sleeve is fixedly connected with a locking convex buckle, the side wall of the fixed sleeve is provided with a locking hole through which the locking convex buckle extends, and the side wall of the locking convex buckle is provided with a guiding inclined surface. The side wall of the pin shaft sleeve is provided with a clearance through hole, and the locking convex buckle is fixedly connected to one side of the clearance through hole.

[0038] like Figure 1 , Figure 4 As shown, the pin sleeve with an end portion is fixedly connected to a limited shoulder, the limited shoulder contacts the end portion of the fixed sleeve, a positioning convex portion is fixedly connected to the end surface of the limited shaft, and a positioning groove for the positioning convex portion to be embedded is provided at the end portion of the pin sleeve. A buffer slope is provided on the driving part and is provided at one end of the sliding part, and the distance between the buffer slope and the central axis of the driving part gradually increases along the direction close to the sliding part. A stabilizing ring located at the edge of the connecting hole is fixedly connected in the assembly gap, the driving part passes through the stabilizing ring, and the outer wall of the driving part contacts the inner wall of the stabilizing ring. When the pin sleeve is connected to the handrail, the pin sleeve is inserted into the fixed sleeve, and the end of the fixed sleeve applies pressure to the locking convex buckle in the inner direction of the pin sleeve through the guide bevel, so that the locking convex buckle bends in the inner direction of the pin sleeve, the positioning convex portion is embedded in the positioning groove, and the locking convex buckle extends into the locking hole, so as to realize the circumferential fixation and axial fixation of the pin sleeve in the fixed sleeve.

[0039] When the handrail body and the handrail frame are unlocked, tension is applied to the two pulling cables at the same time, and the pulling cables pull the locking pin through the connecting buckle. When the locking pin is pulled back into the pin shaft sleeve, the return spring is compressed in the assembly gap, and the buffer slope converts the direct impact between the end face of the sliding part and the end face where the connecting hole is located into the gradually increasing pressure of the buffer slope on the inner wall of the connecting hole, thereby achieving buffering of the sliding of the locking pin.

Claims

1. A latch-type rotating unlocking mechanism for an armrest of a rear seat of an automobile, comprising an armrest frame and an armrest body rotatably connected to the armrest frame, wherein a pin shaft sleeve is detachably connected to the armrest frame, a locking pin is inserted in the pin shaft sleeve, a pulling cable is detachably connected to the end of the locking pin, and the locking pin slides in the pin shaft sleeve when pulled by the pulling cable, characterized in that: The locking pin includes a plug-in portion, a sliding portion and a driving portion respectively along the axial direction, the sliding portion is arranged between the plug-in portion and the driving portion, the end of the pulling rope is connected to the driving portion, the outer wall of the sliding portion is in contact with the inner wall of the pin shaft sleeve, an assembly gap is arranged between the outer wall of the driving portion and the inner wall of the pin shaft sleeve, a connecting hole for the driving portion to extend out is arranged at the end of the pin shaft sleeve, the outer wall of the driving portion is fitted with the inner wall of the connecting hole, a return spring is sleeved on the driving portion and is located in the assembly gap, the end of the plug-in portion extends out of the pin shaft sleeve, and a locking hole for the plug-in portion to extend into is arranged on the handrail body.

2. The latch-type rotating unlocking mechanism for the rear seat armrest of a vehicle according to claim 1, characterized in that: An annular limiting groove is provided on the outer wall of the driving part, a connecting fastener is provided between the driving part and the pulling cable, the end of the pulling cable is connected to the connecting fastener, and an inserting groove is provided on the connecting fastener, and both sides of the inserting groove extend into the annular limiting groove respectively.

3. The latch-type rotating unlocking mechanism for the rear seat armrest of a vehicle according to claim 2, characterized in that: The connecting fastener is provided with a locking hole for the pulling cable to pass through, and one end of the pulling cable passing through the locking hole is fixedly connected to a limiting block, and the limiting block contacts the end of the locking hole to prevent the pulling cable from moving away from the driving part.

4. The latch-type rotating unlocking mechanism for the rear seat armrest of a vehicle according to claim 1, characterized in that: The handrail frame is detachably connected to a steering tube, the pulling rope passes through the steering tube, the handrail frame is fixedly connected to a support plate and a connecting plate respectively located at two ends of the steering tube, the support plate is provided with a support hole for the steering tube to extend out, the connecting plate is provided with a plug-in groove, and the steering tube is provided with a limiting ring groove located on the outer wall of the steering tube away from the support plate at one end, and the limiting ring grooves are inserted on both sides of the plug-in groove to limit the movement of the steering tube in a direction perpendicular to the connecting plate.

5. The latch-type rotating unlocking mechanism for the rear seat armrest of a vehicle according to claim 1, characterized in that: A fixing sleeve for inserting the pin sleeve is fixedly connected to the handrail frame, a locking cam is fixedly connected to the side wall of the pin sleeve, a locking hole extending from the locking cam is arranged on the side wall of the fixing sleeve, and a guiding inclined surface is arranged on the side wall of the locking cam.

6. The latch-type rotating unlocking mechanism for the rear seat armrest of a vehicle according to claim 5, characterized in that: The end of the pin shaft sleeve is fixedly connected with a limiting shoulder, the limiting shoulder contacts the end of the fixed sleeve, a positioning protrusion is fixedly connected with the end surface of the limiting shaft, and the end of the pin shaft sleeve is provided with a positioning groove for the positioning protrusion to be embedded.

7. The latch-type rotating unlocking mechanism for the rear seat armrest of a vehicle according to claim 5, characterized in that: The side wall of the pin shaft sleeve is provided with a clearance through hole, and the locking protrusion is fixedly connected to one side of the clearance through hole.

8. A latch-type rotating unlocking mechanism for a rear seat armrest of a vehicle according to any one of claims 5 to 7, characterized in that: The driving part is provided with a buffer slope and one end of the sliding part is provided with a buffer slope, and the distance between the buffer slope and the central axis of the driving part gradually increases along the direction approaching the sliding part.

9. The latch-type rotating unlocking mechanism for the rear seat armrest of a vehicle according to claim 8, characterized in that: A stabilizing ring located at the edge of the connecting hole is fixedly connected in the assembly gap, the driving part passes through the stabilizing ring, and the outer wall of the driving part contacts the inner wall of the stabilizing ring.

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