WO2011153665A1

WO2011153665A1 - Integrally adjustable seat

Info

Publication number: WO2011153665A1
Application number: PCT/CN2010/001039
Authority: WO
Inventors: 戴贵柱; 戴树乐
Original assignee: Dai Guizhu; Dai Shule
Priority date: 2010-06-09
Filing date: 2010-07-12
Publication date: 2011-12-15
Also published as: CN101850731B; CN101850731A

Abstract

An integrally adjustable seat comprises a seat (1) and a backrest (45), wherein a first hinged seat (3) is arranged in the front of the bottom of the seat (1); the first hinged seat (3) is hinged upon one end of a support rod (2); the other end of the support rod (2) is hinged upon a second hinged seat (4); the first hinged seat (3)and the second hinged seat (4) are positioned in the same vertical plane; the third hinged seat (5) or the eight hinged seat (24) is arranged at the rear of the bottom of the seat (1); the third hinged seat (5) or the eighth hinged seat (24) is hinged upon a sliding component in a support sleeve (13) which is arranged inclined; the support sleeve (13) is fixedly attached to a base (6); a second angle (a2) is set between the axial central line of the support sleeve (13) and the horizontal direction of the bottom of the base (8), wherein the second angle (α2) is a fixed inclination; and an angle adjust device which enables the seat (1) to move forwards the rear to move downwards, and the backrest (45) to move downwards is arranged in the front or at the rear of the seat.

Description

One-piece adjustment seat

Technical field

The present invention relates to a seat, which is a seat that can be adjusted as a whole.

Background technique

Most of the passenger seats used in trains, airplanes and cars adjust the angle of the backrest to alleviate the fatigue of the passengers during long periods of time. Since the seat surface of the seat is perpendicular to the backrest of the seat, when the seat back is adjusted backwards, only the seat posture of the passenger can be changed, the back of the passenger is tilted backward, the leg moves forward, and the passenger is half-lying. Condition, however, this posture allows the passenger's waist to hang in the air, and the weight of the human body is concentrated on the buttocks and back, which cannot relieve the passenger's fatigue. To this end, the applicant designed a seat in 2002 that can adjust the seat back angle of the seat to adjust the seat back and the seat surface simultaneously. This kind of seat can move the rear end of the seat surface downwards, so that the seat surface is inclined backwards. At this time, the passenger's buttocks move obliquely backwards with the seat surface, so that the passenger's weight can be evenly distributed on the seat surface and the backrest, so that the passengers have a better Good comfort. However, the disadvantage of this type of seat is that when the rear part of the seat is moved downwards, the backrest can only be tilted backwards, and the seat surface has no moving distance in the horizontal direction. Therefore, this largely defines the angle at which the backrest is tilted rearward. Since the seat back is inclined at a rearward angle, the rear space must be occupied, thereby affecting the rear passenger space. If the backrest is tilted rearwardly, the passenger's comfort is significantly reduced, making it difficult to relieve the passenger's fatigue. How to increase the adjustment angle of the seat back while increasing the adjustment angle of the seat back while pre-installing multiple rows of seats in the prescribed space is an important subject that has been studied by those skilled in the art for a long time.

Summary of the invention

It is an object of the present invention to provide an integral adjustment seat which can adjust the inclination angle of the seat back according to the needs of the passenger, and move the seat forward and tilt downward, thereby achieving a large angle in a fixed space. The adjustment of the backrest gives the passengers a very high level of comfort.

The present invention is achieved by the following technical solutions for achieving the above object: An overall adjustment seat, including a seat surface and a backrest, a first hinge seat is mounted on the front surface of the bottom surface of the seat surface, the first hinge seat is hinged to one end of the support rod, and the other end of the support rod is hinged to the second hinge seat, and the first hinge seat and the second hinge seat are located at the same In the vertical plane, a third hinge seat or an eighth hinge seat is installed at the rear end of the bottom surface of the seat surface, and the third hinge seat or the eighth hinge seat is hinged with the sliding member in the inclined mounting support sleeve, and the support sleeve is axially A first angle is set between the horizontal plane and the horizontal plane of the seat surface, and the first angle changes according to the inclination of the seat surface. The support sleeve is fixedly connected with the base, and the axial center line of the support sleeve and the bottom surface of the base are disposed at a second angle. The second angle is a fixed angle, and the angle adjusting device that faces the front and moves the rear portion downward, and the backrest moves downward and tilts backward is installed at the front or the rear of the seat. The angle adjusting device is installed at the rear of the seat, and the angle adjusting device has a first push rod installed in the support sleeve, the support sleeve is cylindrical, one end of the first push rod is connected with the spring, and the other end of the first push rod is connected with the third The first connecting sleeve is fixedly connected to the supporting sleeve, the first guiding sleeve is connected with the first eccentric wheel, and the first eccentric wheel is connected with the first adjusting handle. The angle adjusting device is installed at the rear of the seat, and the angle adjusting device has a slider mounted in the supporting sleeve, the supporting sleeve is in the shape of a rail, a positioning hole is formed on the supporting sleeve, the slider moves along the supporting sleeve, and the slider is mounted The fourth hinged seat, the fourth hinged seat and the third hinged seat are connected by a hinged shaft, the hinged shaft is hinged to the positioning block, the positioning block is provided with a positioning pin, and the positioning block is connected with the second adjustment handle. The angle adjusting device is mounted on the front part of the seat, and the structure is: the second hinge seat is hinged to one end of the first sliding sleeve, the second sliding rod is installed in the first sliding sleeve, and the second pushing rod end is connected with the fifth hinge seat The second hinged seat is connected to the middle of the bottom surface of the seat surface, the second push rod is peripherally mounted with the second guide sleeve, the second guide sleeve is connected with the first sliding sleeve, and the second guiding sleeve is connected with the second eccentric wheel, the second The eccentric wheel is connected with the third adjusting handle, the front part of the bottom surface of the seat surface is connected with one end of the leaf spring, the other end of the leaf spring is connected with the upper part of the support rod, the slider in the support sleeve is hinged with the eighth hinge joint, and the eighth hinge joint is connected. The bottom connection that intersects the seat and backrest. The angle adjusting device is installed at the front of the seat, and the structure is: a sixth hinge joint is installed in the middle of the support rod, the sixth hinge joint is connected with the second sliding sleeve, and the third push rod is installed in the second sliding sleeve, and the third push One end of the rod is hinged with the seventh hinge joint, the seventh hinge joint is fixedly connected with the support seat, the third push rod is peripherally mounted with a third guide sleeve, and the third guide sleeve is connected with the second sliding sleeve, the third guide sleeve and the third guide sleeve The third eccentric wheel is connected with the fourth adjusting handle, the front part of the bottom surface of the seat surface is connected with one end of the leaf spring, and the other end of the leaf spring is connected with the upper part of the support rod, and the slider in the support sleeve and the eighth hinge joint hinge Even, the eighth hinged seat is connected to the bottom where the seat surface and the backrest intersect. The rear part of the bottom surface of the seat surface is connected with one end of the pressing spring, and the other ends of the pressing spring are connected with the positioning block. The positive effect of the present invention is that it completely solves the problem that has not been solved in the field for a long time, and the seat is tilted backward while the seat is moved forward, which realizes the angle of the backrest tilting backward in the same space. As large as possible, while increasing the comfort of the passengers, and not occupying the space for the rear passengers, the distance between the front end of the seat in the prior art and the outermost end when adjusting to the maximum angle is about 950 mm, and is used. The seat of the structure of the present invention can shorten this distance to about 900 mm, which can add one more row of seats to one train compartment. Because the backrest of the seat of the present invention is adjusted backwards while the seat surface 1 is moved forward, the seat back adjustment does not simply occupy the rear space of the seat, but takes up a reasonable space for movement in front of the seat. The seat of the present invention enables the existing aircraft seat to tilt the backrest to the maximum angle with the front and rear row spacing of the seat unchanged, and to tilt the seat face downward, thereby providing the passenger with extremely high comfort. The angle of the seat back of the present invention adjusted rearward may be 110°, 120°, 130°, 135° or other desired angle. DRAWINGS

1 is a schematic structural view of an embodiment of the present invention; FIG. 2 is a schematic enlarged view of a portion I of FIG. 1; FIG. 3 is a schematic structural view of the second embodiment of the present invention; FIG. 5 is a schematic cross-sectional view showing the structure of the third embodiment of the present invention; FIG. 7 is a schematic view showing the structure of the third embodiment of the present invention; FIG. 9 is a schematic view showing the structure of the fourth embodiment of the present invention; FIG. 10 is a schematic view showing the structure of the fourth embodiment of the present invention;

detailed description

The invention will be further described with reference to the accompanying drawings. '

Example:

The design of the seat of the present invention is characterized in that: the seat surface 1 can be moved forward and backward, the backrest is moved downward and tilted upwards, and one of the solutions for achieving this function is: a support can be provided at the front of the seat The backrest angle adjusting device is disposed at the rear of the seat. When the angle adjusting device installed at the rear of the seat adjusts the backrest angle, the supporting structure of the front portion of the seat passively changes the supporting angle with the angle adjusting device. The second solution is: set the support at the rear of the seat, and set the backrest angle adjustment device at the front of the seat. When adjusting the backrest angle with the angle adjustment device installed at the front of the seat, the support at the rear of the seat is adjusted with the angle. The device passively changes the support position. There are a number of well known techniques for angle adjustment devices that achieve backrest angle adjustment. Several embodiments provided by the present invention are technical solutions for achieving the purpose of backrest angle adjustment at an angle adjusting device mounted at the front or the rear of the seat, but the scope of the present invention is not limited to these embodiments.

The overall technical solution for the seat of the present invention comprises a seat surface 1 and a backrest 45. The first hinge seat 3 is mounted on the front surface of the bottom surface of the seat surface 1. The first hinge joint 3 is hinged to the end of the support rod 2, and the support rod 2 the other end is hinged with the second hinged seat 4, the first hinged seat 3 and the second hinged seat 4 are located in the same vertical plane, and the third hinged seat 5 or the eighth hinge is mounted on the rear end of the bottom surface of the seat surface 1 The seat 24, the third hinge seat 5 or the eighth hinge seat 24 are hinged with the sliding member in the tilt-mounted support sleeve 13, and the first angle α is set between the axial direction of the support sleeve 13 and the horizontal surface of the seat surface 1, The first angle α changes with the seat surface 1 tilting downward, and the support sleeve 13 is fixedly connected with the base 6. The axial center line of the support sleeve 13 and the horizontal direction of the bottom surface of the base 6 are disposed at a second angle α ₂ , second The angle α ₂ is a fixed angle, and the angle adjusting device that moves the seat surface 1 forward and moves the rear portion downward, and the backrest moves downward and tilts rearward is installed at the front or the rear of the seat.

The first hinge seat 3, the support rod 2 and the second hinge seat 4 according to the present invention may be installed at an intermediate portion of the front end of the bottom surface of the seat surface 1, or may be respectively mounted on both sides of the bottom surface of the seat surface 1. The sliding member in the support sleeve 13 is a member such as a push rod or a slider that can move axially along the support sleeve 13.

The third hinge seat 5 according to the present invention can be mounted at any position at the rear of the seat surface 1. When the angle adjusting device is mounted at the rear of the seat, the third hinge seat 5 is connected to the components of the angle adjusting device. The eighth hinge seat 24 is mounted on the bottom surface of the seat surface 1 and the intersection of the seat surface 1 and the backrest 45. When the angle adjusting device is installed at the front of the seat, the support at the rear of the seat is passively changed with the angle adjusting device. The eighth hinge joint 24 is hinged with the sliding member in the support sleeve 13. The first angle changes as the seat surface 1 moves downward, and the second angle α ₂ is a fixed angle, less than 90°, and generally 40. -70° is suitable, which can be determined according to the angle that the backrest 45 needs to be adjusted and the space for installing the seat. The second angle α ₂ can also be 20° -80°, and the second angle α ₂ can also be 45° -65 ° These angles are determined at a 90° angle to the seat back 1 and the backrest 45. When the angle between the seat surface 1 and the backrest 45 is greater than 90°, these angles can be adjusted accordingly.

When the angle adjusting device is installed at the rear of the seat, the support structure can be installed at the front of the seat, and the support rod 2 passively changes position with the backrest angle adjusting device at the rear of the seat. Example 1: The angle adjusting device is installed at the seat At the rear of the chair, the angle adjusting device has a first push rod 8 installed in the support sleeve 13, the support sleeve 13 is cylindrical, and the first push rod is 8-end and The spring 12 is connected, the other end of the first push rod 8 is connected to the third joint base 5, and the first push rod 8 is externally mounted with the first guide sleeve 9. The first guide sleeve 9 is fixedly connected with the support sleeve 13, and the first guide sleeve 9 is 9 The first eccentric 10 is connected to the first eccentric wheel 10, and the first eccentric 10 is connected to the first adjusting handle 11. The supporting structure of the front part of the seat is: the first hinged seat 3 is mounted on the front surface of the bottom surface of the seat surface 1, and the first hinged seat 3 The second end of the support rod 2 is hinged with the second hinge joint 4, and the first joint base 3 and the second joint base 4 are located in the same vertical plane.

Example 2: The angle adjusting device is installed at the rear of the seat, and the angle adjusting device has a slider 16 installed in the supporting sleeve 13. The supporting sleeve 13 is in the shape of a rail, and the supporting sleeve 13 defines a positioning hole 18, and the slider 16 can be along The support sleeve 13 is moved, and the fourth hinge seat 23 is mounted on the slider 16. The fourth hinge seat 23 and the third hinge seat 5 are connected by a hinge shaft 21, and the hinge block 21 is hinged to the positioning block 17, and the positioning block 17 is provided with a positioning pin 20, the positioning block 17 is connected with the second adjusting handle 30, and the supporting structure of the front part of the seat is: the first hinged seat 3 is mounted on the front surface of the bottom surface of the seat surface 1, the first hinged seat 3 and the support rod 2 - end hinge, the other end of the support rod 2 is hinged with the second hinge seat 4, and the first hinge seat 3 and the second hinge seat 4 are located in the same vertical plane.

In the seat according to the present invention, when the backrest angle adjusting device is attached to the front portion of the seat, the support structure may be attached to the rear of the seat. Example 3: When the angle adjusting device is installed at the front of the seat, the structure is as follows: the second hinged seat 4 is hinged to the end of the first sliding sleeve 38, and the second sliding rod 35 is mounted in the first sliding sleeve 38, the second The pusher 35-end is hinged to the fifth hinged seat 32. The fifth hinged seat _{32 is} connected to the middle of the bottom surface of the seat surface 1, and the second pusher 35 is externally mounted with the second guide sleeve 34, and the second guide sleeve '34 and The first sliding sleeve 38 is connected, the second guiding sleeve 34 is connected to the second eccentric 36, the second eccentric 36 is connected to the third adjusting handle 33, and the front surface of the seat surface 1 is connected to one end of the leaf spring 14, and the leaf spring 14 is further connected. One end is connected to the upper part of the support rod 2, and the support structure of the rear part of the seat is: the base 6 is connected with the support sleeve 13, and the slider 16 installed in the support sleeve 13 is hinged with the eighth hinge joint 24, and the eighth hinge joint 24 is connected to the bottom portion where the seat surface 1 and the backrest 45 intersect, and the eighth hinge joint 24 is connected to the slider 16 via the hinge shaft 21, and the slider 16 slides in the rail-type support sleeve 13. The leaf spring 14 in this embodiment is used to reset the seat surface 1. Of course, the structure for resetting the seat surface 1 may not be the leaf spring 14, or the spring 37 may be attached to the second push rod 35. The spring 37 is mounted in the first sliding sleeve 38 for resetting the seat surface 1.

Example 4: The angle adjusting device is installed at the front part of the seat, and the structure is: a sixth hinge joint 28 is installed in the middle of the support rod 2, and the sixth hinge joint 28 is hinged with the second sliding sleeve 41, and the second sliding sleeve 41 is inside. Install the third push rod 43, the third push rod 43 - end and seventh The hinged seat 26 is hinged, the seventh hinged seat 26 is fixedly connected to the support base 27, the third push rod 43 is externally mounted with a third guide sleeve 40, and the third guide sleeve 40 is connected with the second sliding sleeve 41, and the third guide sleeve 40 is connected with the third eccentric 44, the third eccentric 44 is connected with the fourth adjusting handle 39, the front surface of the seat surface 1 is connected to one end of the leaf spring 14, and the other end of the leaf spring 14 is connected with the upper part of the support rod 2, behind the seat The support structure of the part is: the base 6 is connected with the support sleeve 13, the slider 16 in the support sleeve 13 is hinged with the eighth hinge joint 24, and the eighth hinge joint 24 is connected to the bottom where the seat surface 1 and the backrest 45 intersect. The eighth hinge j 24 is coupled to the slider 16 via a hinge shaft 21, and the slider 16 slides within the rail support sleeve 13. The leaf spring 14 in this embodiment is used to reset the seat surface 1. The seat surface of a structure may also be reset without using a leaf spring 14, the spring ₄₂ may be mounted at the end of the third plunger 43, a spring 42 is mounted within the second sleeve 41, a seat surface for resetting.

In order to assist the reset of the seat surface 1, the rear part of the bottom surface of the seat surface 1 can be connected to the end of the pressing spring 15 , and the other end of the pressing spring 15 is connected with the positioning block 17 .

The function of completing the backrest angle adjusting device of the present invention can also be driven by electric power, hydraulic pressure, air pressure, etc., and the structure of the backrest is inclined downward and backward, and can also be used for a screw nut, a rack and pinion, a worm gear, a chute and the like. Rod and other structures.

When the seat of the present invention is used, the angle of the backrest is adjusted. As shown in FIG. 1, the first adjusting handle 11 is pulled, so that the first adjusting handle 11 drives the first eccentric 10 out of the first guiding sleeve 9, and the first pushing rod 8 acts under gravity. The lower support sleeve 13 is axially moved downward, because the axial center line of the support sleeve 13 is disposed at a second angle α ₂ with the bottom surface of the base 6, and at the same time, the front surface of the seat surface 1 is hinged with the support rod 2, thereby driving the seat surface 1 While moving forward, the rear portion of the seat surface 1 moves downward, and the backrest 45 moves downward while tilting backward. When the angle of the backrest 45 is adjusted to the required angle, the first adjustment handle 11 is pulled in the opposite direction, and the first eccentric wheel 10 is locked by the first guide sleeve 9.

As shown in FIG. 3, the second adjusting handle 30 is pulled, and the positioning pin 20 is disengaged from the positioning hole 18 of the support sleeve 13 by the positioning block 17, and the slider 16 moves downward along the support sleeve 13 under the action of gravity, thereby driving the seat. The face 1 and the backrest 45 are moved down to achieve the purpose of adjusting the angle of the backrest 45.

As shown in FIG. 6, the third adjustment handle 33 is pulled, and the third adjustment handle 33 drives the second eccentric 36 away from the second guide sleeve 34. The second push rod 35 drives the seat surface 1 and the backrest 45 along the second force by gravity. The sliding sleeve 38 is moved downward. At this time, the seat surface 1 and the backrest 45 are moved downward in the axial direction of the support sleeve 13, thereby driving the seat surface 1 to move forward while the rear surface of the seat surface 1 is inclined downward. When the backrest 45 is moved downward, the backrest 45 is tilted backward to achieve the purpose of adjusting the angle of the backrest. The seat surface 1 is reset by the spring force of the leaf spring 14. When the third adjustment handle 33 is pulled in the opposite direction, the positioning is locked.

As shown in FIG. 8, the fourth adjusting handle 39 is pulled, and the fourth adjusting handle 39 drives the third eccentric 44 to disengage from the third guiding sleeve 40. The third pushing rod 43 acts as a supporting rod under the gravity of the fourth adjusting handle 39. 2 moves to the front of the seat, thereby causing the seat surface 1 to move forward. Since the bottom surface of the intersection of the seat surface 1 and the backrest 45 is mounted with the eighth hinge joint 24, the eighth hinge joint 24 is connected with the slider in the support sleeve 13, Therefore, the rear portion of the seat surface 1 moves downward, and the backrest 45 moves downward and tilts rearward to achieve the purpose of adjusting the angle of the backrest. The fourth adjusting handle 39 is pulled in the opposite direction, and the third eccentric wheel 44 is driven to catch the third guiding sleeve 40 locking angle adjusting device.

In the figure, 19 is a through hole, and 22 is a handle.

Claims

Claim

1. An overall adjustment seat comprising a seat surface (1) and a backrest (45), characterized in that: a seat surface (1) is mounted with a first hinge seat (3) at the front of the bottom surface, and a first hinge seat (3) ) hinged to the end of the support rod (2), the other end of the support rod (2) is hinged to the second hinge seat (4), and the first hinge seat (3) and the second hinge seat (4) are located in the same In the vertical plane, the third hinged seat (5) or the eighth hinged seat (24), the third hinged seat (5) or the eighth hinged seat (24) and the inclined surface are mounted on the rear surface of the seat surface (1). The sliding member in the installed support sleeve (13) is hinged, and the first angle (C) is set between the axial direction of the support sleeve (13) and the horizontal surface of the seat surface (1), and the first angle ( _{α ι} ) is seated. The surface (1) is tilted down and changed, the support sleeve (13) is fixedly connected with the base (6), and the axial center line of the support sleeve (13) and the bottom surface of the base (6) are disposed at a second angle (α ₂ ). , the second angle ( α ₂ ) is a fixed angle, and the angle adjustment device that moves the seat surface (1) forward and moves the rear portion downward, the backrest moves downward and tilts backward is installed at the front or the rear of the seat unit.

2. An integral adjustment seat according to claim 1, wherein: the angle adjustment device is mounted at the rear of the seat, and the angle adjustment device has a first push rod mounted in the support sleeve (13) (8) The support sleeve (13) is cylindrical, the first push rod (8) is connected to the spring (12), and the other end of the first push rod (8) is connected to the third joint (5). The first guiding sleeve (9) is mounted on the outer circumference of the rod (8), the first guiding sleeve (9) is fixedly connected with the supporting sleeve (13), and the first guiding sleeve (9) is connected with the first eccentric wheel (10), first The eccentric (10) is connected to the first adjustment handle (11).

3. An integral adjustment seat according to claim 1, wherein: the angle adjustment device is mounted at the rear of the seat, and the angle adjustment device has a slider (16) mounted in the support sleeve (13). The support sleeve (13) is in the shape of a guide rail, a positioning hole (18) is formed on the support sleeve (13), the slider (16) moves along the support sleeve (13), and the fourth hinge joint is mounted on the slider (16) ( 23), the fourth hinge seat (23) and the third hinge seat (5) are connected by a hinge shaft (21), and the hinge shaft (21) is hinged to the positioning block (17), and the positioning block (17) A positioning pin (20) is provided, and the positioning block (17) is connected to the second adjustment handle (30).

4. The overall adjustment seat according to claim 1, wherein: the angle adjusting device is mounted on the front portion of the seat, and the structure is: the second hinge seat (4) and the first sliding sleeve (38) - end hinge, first slide (38) The second push rod (35), the second push rod (35) end is hinged to the fifth hinge joint (32), and the fifth hinge joint (32) is connected to the middle surface of the seat surface (1), the second push rod (35) The second guiding sleeve (34), the soil guiding sleeve (34) and the first sliding sleeve are installed on the outer circumference.

(38) Connection, the second guide sleeve (34) is connected to the second eccentric (36), the second eccentric (36) is connected to the third adjustment handle (33), the seat surface (1) the bottom front and the leaf spring (14) One end is connected, the leaf spring (14) is at the other end and the support 杵

(2) Upper connection, the slider (16) in the support sleeve (13) is hinged with the eighth hinge seat (24), and the eighth hinge seat (24) is intersected with the seat surface (1) and the backrest (45) The bottom of the connection.

5. The overall adjustment seat according to claim 1, wherein: the angle adjusting device is mounted on the front portion of the seat, and the structure is: a support rod (2) is mounted in the middle of the sixth hinge joint (28), Sixth hinged seat (28) and second sliding sleeve

(41) connection, a third push rod (43) is installed in the second sliding sleeve (41), the third push rod (43) end is hinged with the seventh hinge joint (26), and the seventh hinge joint (26) ) fixed connection to the support base (27), third guide sleeve mounted on the outer periphery of the third push rod (43)

(40), the third guiding sleeve (40) is connected with the second sliding sleeve (41), the third guiding sleeve (40) is connected with the third eccentric (44)', the third eccentric (44) and the fourth adjustment The handle (39) is connected, the front surface of the seat surface (1) is connected to the leaf spring (14). The end of the leaf spring (14) is connected to the upper part of the support rod (2), and the slider inside the support sleeve (13) ( 16) is hinged to the eighth hinged seat (24), and the eighth hinged seat (24) is connected to the bottom where the seat surface (1) and the backrest (45) intersect.

6. An integral adjustment seat according to claim 3, characterized in that: the seat surface (1), the bottom surface of the bottom surface i3⁄4i, the spring (15) is connected at the end, and the other end of the spring (15) is pressed against the positioning block ( 17) Connect.