Tray

Abstract

The utility model provides a tray which comprises a base and a swing seat, the swing seat is rotatably connected with the base through a swing rotating shaft arranged in the front-back direction, one of the swing seat and the base is provided with a lock pin arranged in a sliding mode, the other one of the swing seat and the base is provided with a locking hole, and the locking hole is located on a sliding path of the lock pin. When the lock pin enters the locking hole, the base and the swing seat are locked and relatively static, and when the lock pin leaves the locking hole, the swing seat can swing left and right relative to the base; one of the swing seat and the base is further provided with a sliding part which is arranged in a sliding mode, a guide groove is formed in the sliding part, a transmission part is arranged between the sliding part and the lock pin, one end of the transmission part is arranged in the guide groove, and the other end of the transmission part is connected with the lock pin; when the sliding piece slides, the transmission piece moves under the action of the guide groove and drives the lock pin to move close to or away from the locking hole. The dynamic state and the static state of the seat part are effectively switched, and a user is prevented from feeling tired.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, and in particular to a tray for seating. Background Technology

[0002] As people's living standards and working conditions improve, the demand for office chairs is increasing, and the corresponding requirements are also getting higher. In modern office chairs, the chassis is an indispensable and important component. The chassis generally integrates multiple functions, such as gas spring height adjustment and backrest tilt adjustment.

[0003] There is a type of chassis that allows the seat to swing dynamically from side to side, making it more comfortable for users to sit and allowing for more flexible posture changes, which is very popular with consumers. However, this type of chassis has no locking capability for its left and right dynamic swing, so the seat can always swing from side to side. It is difficult for users to even maintain a horizontal sitting position for a short time, let alone maintain a horizontal sitting position for a long time like a traditional chair. Due to the shortcomings of this non-locking dynamic chassis, it not only loses the user group who prefer the sitting experience of a regular chair, but also causes users to feel tired after a long time of dynamic swinging, reducing comfort and causing health problems. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this utility model provides a tray in which the swing seat and the base swing left and right through swinging rotation. At the same time, the two are selectively unlocked or locked by a locking pin and a locking hole. The locking pin is driven to slide by a sliding member and a transmission member. When the locking pin slides into the locking hole, the swing seat and the base are locked. When the locking pin slides out of the locking hole, the swing seat can rotate relative to the base, so that the seat can swing left and right dynamically, and can also stably support the human body to sit like a traditional seat.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A tray includes a base and a swing seat. The swing seat and the base are rotatably connected by a swing shaft arranged in a front-to-back direction. One of the swing seat and the base has a slidably disposed locking pin, and the other of the swing seat and the base has a locking hole located on the sliding path of the locking pin. When the locking pin enters the locking hole, the base and the swing seat are locked and relatively stationary. When the locking pin leaves the locking hole, the swing seat can swing left and right relative to the base. One of the swing seat and the base also has a slidably disposed sliding member with a guide groove. A transmission member is provided between the sliding member and the locking pin. One end of the transmission member is disposed in the guide groove, and the other end of the transmission member is connected to the locking pin. When the sliding member slides, the transmission member moves under the action of the guide groove and drives the locking pin to move closer to or away from the locking hole.

[0007] The swing base and the base are selectively locked by the selective insertion of the locking pin and the locking hole, the movement of the locking pin is driven by the sliding base, when the sliding base slides, the guide groove on the sliding base drives the transmission member to move and then drives the locking pin to slide, the structure is simple and convenient to operate, and the locking and unlocking are completed at one step; when the swing base and the base are locked, it is the same as the traditional seat part, and the user can always keep a horizontal sitting posture; when the swing base and the base are unlocked and can swing left and right, the user can switch the sitting posture at will; thereby the application of the swing base is more flexible, the dynamic and static switching of the seat part is effectively performed, the user's fatigue is prevented, the use comfort is increased, and health problems are prevented.

[0008] As preferred, the sliding member slides along the left-right direction, and the path of the guide groove has an angle relative to the left-right direction. That is, the guide groove is an inclined groove, and the path of the guide groove has an inclination in the front-rear direction along the left-right direction, so that the transmission member can be driven to move when the sliding member slides, and then the locking pin is driven to move by the transmission member.

[0009] As preferred, the transmission member is a torsion spring, the torsion spring is rotationally arranged on the base, one torsion arm of the torsion spring is inserted into the guide groove, and the other torsion arm of the torsion spring is inserted into the locking pin. The torsion spring is first rotated by the movement of the sliding base through the guide groove, and then the locking pin is driven to slide by the rotation of the torsion spring, and the locking pin can move forward and backward, because the guide groove and the transmission member have the ability to drive the locking pin to slide in a direction different from the movement direction of the sliding member; and the locking pin needs to be aligned with the locking hole before being inserted and locked, the elastic torsion spring can give the locking pin a force to move towards the locking hole when the locking pin is not aligned, and the locking can be realized once the locking pin is aligned with the locking hole, the delayed locking is realized, and the locking can be operated first and then realized when the condition is met.

[0010] As preferred, the swing base is provided with an operation rod which is slidingly arranged, the operation rod is arranged along the left-right direction, and the operation rod is linked with the sliding member. The left-right sliding operation rod cooperates with the sliding of the sliding member, and the sliding member slides left and right to realize the linkage when the operation rod slides.

[0011] As preferred, the operation rod is provided with a clamping spring, the sliding member is provided with two limiting protrusions which are arranged at intervals left and right, and the clamping spring is arranged in the two limiting protrusions. When the operation rod slides, the clamping spring drives the sliding member to slide left and right. The linkage of the operation rod and the sliding member is realized by pushing the two limiting protrusions by the clamping spring, and the structure is simple.

[0012] As preferred, the distance between the two limiting protrusions is greater than the snap spring; the limiting protrusions are provided with a clearance groove, and the depth of the clearance groove is greater than the radius of the operating rod. That is, the snap spring and the sliding member have a distance, and the operating rod and the sliding member also have a distance, so that the sliding member can avoid the operating rod swinging left and right with the swing seat; the operating rod and the sliding member are not tightly connected, and since the operating rod is arranged on the swing seat and the sliding member is arranged on the base, when the swing seat swings, the operating rod also swings with the sliding member, and although the two are linked, they also need to have a swing allowance.

[0013] As preferred, the operating rod is above the sliding member, the operating rod is provided with a bolt, the sliding member is provided with a containing hole, the bolt is inserted into the containing hole, and the diameter of the containing hole is greater than the diameter of the bolt. Similarly, the operating rod and the sliding member are linked, but they also have a swing allowance under the action of the bolt and the containing hole.

[0014] As preferred, the sliding member is arranged on the front side plate of the base, the sliding member comprises an elastic part, the elastic part is provided with a gear protrusion, the front side plate is provided with a containing groove, and the gear protrusion is arranged in the containing groove; the containing groove is also provided with a locking gear groove and an unlocking gear groove, and the locking gear groove and the unlocking gear groove are arranged at intervals along the sliding direction of the sliding member; when the sliding member slides, the elastic part elastically deforms and makes the gear protrusion switch between the locking gear groove and the unlocking gear groove. The elastic part has elasticity, and when the user gives the operating rod a pushing and pulling force, the sliding member moves, so that the gear protrusion can switch between the two gear grooves when the elastic part elastically deforms; when the gear protrusion is in any gear groove, the operating rod can be prevented from being misoperated, that is, in the case that the operating rod is not forced or is forced small, the state of the swing base at this time is maintained.

[0015] As preferred, the locking hole is arranged on the front end plate of the swing seat, and the locking pin is slidingly arranged on the base and arranged in the front-rear direction; the base is provided with at least two locking pins, and the two locking pins are arranged at intervals left and right. The locking of the plurality of locking pins and the locking hole is conducive to keeping the base and the swing seat stable when they are locked.

[0016] As preferred, the swing seat is provided with a seat connecting piece, an inclination rotation shaft is arranged between the seat connecting piece and the swing seat, and the seat connecting piece is rotationally arranged on the swing seat through the inclination rotation shaft. In addition to left-right swinging, the seat connected to the base can also be inclined and swung forward and backward, and the dynamic capability is further improved.

[0017] The design starting point, concept and beneficial effects of the utility model with the above technical scheme are:

[0018] The swing base and the base are selectively locked by the selective insertion of the locking pin and the locking hole, the movement of the locking pin is driven by the sliding base, when the sliding base slides, the guide groove on the sliding base drives the movement of the transmission member and then drives the sliding of the locking pin, the structure is simple and convenient to operate, and the locking and unlocking are completed in one step; when the swing base and the base are locked, it is the same as the traditional seat part, and the user can always keep a horizontal sitting posture; when the swing base and the base are unlocked and can swing left and right, the user can freely switch the sitting posture; so that the application of the swing base is more flexible, the dynamic and static switching of the seat part is effectively performed, the fatigue of the user is prevented, the use comfort is increased, and health problems are prevented. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a perspective structural schematic view of the swing base in the embodiment 1 of the utility model Figure One ;

[0020] Figure 2 It is a perspective structural schematic view of the swing base in the embodiment 1 of the utility model Figure Two ;

[0021] Figure 3 It is an explosion view of the swing base in the embodiment 1 of the utility model;

[0022] Figure 4 It is a perspective structural schematic view of the base and the swing base combination in the embodiment 1 of the utility model;

[0023] Figure 5 It is a perspective structural schematic view of the base in the embodiment 1 of the utility model, wherein the locking pin, the sliding member, the transmission member and the buffer spring are arranged in the base;

[0024] Figure 6 It is a perspective structural schematic view of the base in the embodiment 1 of the utility model, wherein the front side plate and the sliding member are connected;

[0025] Figure 7 It is a perspective structural schematic view of the base in the embodiment 1 of the utility model, wherein the transmission member, the sliding member and the locking pin are connected;

[0026] Figure 8 It is a perspective structural schematic view of the base in the embodiment 1 of the utility model, wherein the operating rod and the sliding member are connected;

[0027] Figure 9 It is a perspective structural schematic view of the swing base in the embodiment 1 of the utility model;

[0028] Figure 10 It is a perspective structural schematic view of the base in the embodiment 1 of the utility model;

[0029] Figure 11The utility model discloses a base inside setting lock pin, slider, transmission part, buffer spring's three-dimensional structure schematic diagram in embodiment 2.

[0030] Figure 12 The utility model discloses a bolt's three-dimensional structure schematic diagram of setting on operating lever in embodiment 2.

[0031] Figure 13 The utility model discloses a slider sets on the base front side plate's three-dimensional structure schematic diagram in embodiment 2.

[0032] The reference numerals are: base 1;Front side plate 101;Swing seat 2;Front end plate 201;Swing pivot 3;Lock pin 4;Locking hole 5;Slider 6;Groove 61;Vertical board 62;Elastic part 63;Guide slot 7;Transmission part, torsional spring 8;Seat connecting piece 9;Inclination pivot 10;Buffer spring 11;Mounting plate 12;Gear convex part 13;Accommodation groove 14;Locking gear slot 15;Unlocking gear slot 16;Guide plate 17;Operating lever 18;Clamp spring 19;Limit convex part 20;Avoidance groove 21;Bolt 22;Accommodation hole 23. DETAILED DESCRIPTION

[0033] In order to more clearly understand the above purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the drawings and specific embodiments. It should be explained that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0034] In the following description, a lot of specific details are set forth in order to fully understand the utility model, but the utility model can also be implemented in other ways different from the description, therefore, the protection scope of the utility model is not limited by the following disclosed specific embodiments.

[0035] In the description of the utility model, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0036] The specific embodiment of the utility model is as follows:

[0037] Embodiment 1: as Figures 4-7As shown, the utility model provides a kind of tray, including pedestal 1 and swing seat 2, swing seat 2 is rotatably connected with pedestal 1 by swing pivot 3 arranged in front-back direction, one of swing seat 2 and pedestal 1 is equipped with the locking pin 4 of sliding arrangement, the other of swing seat 2 and pedestal 1 is equipped with locking hole 5, locking hole 5 is located on the sliding path of locking pin 4, when locking pin 4 enters locking hole 5, pedestal 1 and swing seat 2 are locked and relatively stationary, when locking pin 4 leaves locking hole 5, swing seat 2 can swing left and right relative to pedestal 1;One of swing seat 2 and pedestal 1 is further equipped with the sliding piece 6 of sliding arrangement, the guiding groove 7 is opened in sliding piece 6, transmission member 8 is arranged between sliding piece 6 and locking pin 4, one end of transmission member 8 is arranged in guiding groove 7, the other end of transmission member 8 is connected with locking pin 4;When sliding piece 6 slides, transmission member 8 moves under the action of guiding groove 7 and drives locking pin 4 to move close to or away from locking hole 5.

[0038] Swing seat 2 and pedestal 1 are selectively locked by the selective insertion of locking pin 4 and locking hole 5, the movement of locking pin 4 is driven by sliding seat, and the guiding groove 7 on the sliding seat drives the movement of transmission member 8 and the sliding of locking pin 4 when the sliding seat slides, which is simple in structure and convenient to operate, and the locking and unlocking are completed in one step; when swing seat 2 and pedestal 1 are locked, it is no different from the traditional seat part, and the user can always maintain a horizontal sitting posture; when swing seat 2 and pedestal 1 are unlocked and can swing left and right, the user can freely switch the sitting posture; thereby making the application of the swing base more flexible, effectively switching the seat part between dynamic and static, preventing the user from feeling tired, increasing the use comfort, and preventing health problems.

[0039] Specifically, as shown, Figures 1-4 Pedestal 1 can also be used to connect the air rod of the seat, so pedestal 1 remains stationary in the seat, and seat part connecting piece 9 is further provided on swing seat 2, seat part connecting piece 9 is used to connect the seat part, and inclination pivot 10 is arranged between seat part connecting piece 9 and swing seat 2 along the left-right direction, seat part connecting piece 9 is rotatably arranged on swing seat 2 through inclination pivot 10, so that the seat part connected on the base can not only swing left and right, but also can be inclined forward and backward, and the dynamic ability is further improved; pedestal 1 and swing seat 2 are rotatably connected by two swing pivots 3, one of the two swing pivots 3 is inserted on the front side plate 101 of pedestal 1 and the front end plate 201 of swing seat 2, and the other swing pivot 3 is inserted on the rear side plate of pedestal 1 and the rear end plate of swing seat 2; two buffer springs 11 are further arranged between pedestal 1 and swing seat 2, and the two buffer springs 11 are respectively arranged on the left and right sides of swing pivot 3, and the buffer spring 11 can buffer the swing of swing seat 2 relative to pedestal 1, so as to improve the comfort.

[0040] In this embodiment, the locking pin 4 is disposed on the base 1 and arranged in the front-back direction, and the locking hole 5 is disposed on the swing seat 2 and specifically located on the front end plate 201 of the swing seat 2. There are two locking pins 4 and two locking holes 5, and their positions correspond one-to-one. The locking pin 4 and the corresponding locking hole 5 are located on the same front-back straight line. The two sets of locking pins 4 and locking holes 5 are arranged at intervals to facilitate the stability of the base 1 and the swing seat 2 when locked. The base 1 is also provided with a mounting plate 12 behind its front side plate 101, and the locking pin 4 is inserted into the front side plate 101 and the mounting plate 12.

[0041] like Figures 7-10 As shown, the sliding member 6 has a groove 61. The sliding member 6 is slidably mounted on the front side plate 101 of the base 1, and the upper end of the front side plate 101 is located in the groove 61. The sliding member 6 has a vertically mounted vertical plate 62, which is located in front of the front side plate 101. The vertical plate 62 has a slot, so that the part of the vertical plate 62 below the slot forms an elastic part 63. The elastic part 63 has a stop protrusion 13. The front side plate 101 has a receiving groove 14 near the position of the elastic part 63. The stop protrusion 13 protrudes upward on the elastic part 63 and backward out of the vertical plate 62. The stop protrusion 13 is arc-shaped and is located in the receiving groove 14. The receiving groove 14 also has an upwardly recessed locking stop groove 15 and an unlocking stop groove 16. The fixed gear slot 15 and the unlocking gear slot 16 are arranged at intervals in the left and right direction. When the slider 6 slides, the elastic part 63 deforms and causes the gear protrusion 13 to switch between the locking gear slot 15 and the unlocking gear slot 16. Because the elastic part 63 is elastic, when the user applies a pushing or pulling force to the operating lever 18, the slider 6 moves, so that the gear protrusion 13 can switch between the two gear slots when the elastic part 63 undergoes elastic deformation. When the gear protrusion 13 is located in any gear slot, it can prevent the operating lever 18 from being misoperated, that is, when the operating lever 18 is not under force or under a small force, it maintains the current state of the rocking chassis. Moreover, it provides feedback to the user on gear switching, so that the user can know whether he has successfully completed the locking and unlocking switch.

[0042] Since there are two locking pins 4, and two guide grooves 7 and two transmission components 8, the sliding member 6 further includes two horizontally protruding guide plates 17. Each guide plate 17 has the aforementioned guide groove 7. The path of the guide groove 7 has an angle relative to the left and right directions, i.e., the guide groove 7 is an inclined groove. The path of the guide groove 7 is inclined in the front and back directions along the left and right directions, so that when the sliding member 6 slides, it can drive the transmission component 8 to move, and then the transmission component 8 drives the locking pin 4 to move. The transmission component 8 is a torsion spring 8, which is rotatably mounted on the base 1. One torsion arm of the torsion spring 8 is inserted into the guide groove 7, and the other torsion arm of the torsion spring 8 is inserted into... In the locking pin 4, the sliding member 6 is located above the locking pin 4, and the two torsion arms of the torsion spring 8 are bent up and down respectively. First, the sliding seat moves through the guide groove 7 to drive the torsion spring 8 to rotate, and then the rotation of the torsion spring 8 drives the locking pin 4 to slide. The locking pin 4 moves back and forth because the guide groove 7 and the transmission member 8 are capable of driving the locking pin 4 to slide in a direction different from the sliding member 6. The locking pin 4 needs to be aligned with the locking hole 5 before it can be inserted for locking. The elastic torsion spring 8 can give the locking pin 4 a force to move towards the locking hole 5 even when it is not aligned. Once the locking pin 4 is aligned with the locking hole 5, it can be locked, realizing delayed locking. It can be operated first, and locked after the conditions are met.

[0043] In this embodiment, the guide groove 7 extends obliquely from left to right and backward. The locking position groove 15 is located to the right of the unlocking position groove 16. When the position protrusion 13 is located in the locking position groove 15, the slider 6 is located to the right of the front side plate 101 of the base 1, and the torsion arm of the torsion spring 8 is located at the left front end of the guide groove 7. At this time, the locking pin 4 is located in the locking hole 5, and the swing seat 2 and the base 1 are locked. When the slider 6 slides to the left, the torsion arm of the torsion spring 8 moves from the front end of the guide groove 7 to the right rear end of the guide groove 7. The torsion spring 8 rotates and drives the locking pin 4 to move backward, and the elastic part 63 deforms so that the position protrusion 13 can switch to the unlocking position groove 16. When the position protrusion 13 is located in the unlocking position groove 16, the slider 6 is located to the right of the front side plate 101 of the base 1, and the torsion arm of the torsion spring 8 is located at the right rear end of the guide groove 7. The locking pin 4 moves backward and leaves the locking hole 5 due to the rotation of the torsion spring 8. At this time, the swing seat 2 can swing left and right equivalent to the base 1.

[0044] Furthermore, such as Figures 4-6As shown in Figure 8, the swing base 2 is provided with a sliding operating rod 18, which is arranged in the left-right direction. The operating rod 18 is linked with the sliding member 6. Specifically, the operating rod 18 is provided with a retaining spring 19, and the sliding member 6 is provided with two left-right spaced limiting protrusions 20. The retaining spring 19 is located in the two limiting protrusions 20. When the operating rod 18 slides, the retaining spring 19 drives the sliding member 6 to slide left and right. The left-right sliding operating rod 18 cooperates with the sliding member 6. When the operating rod 18 slides, it drives the sliding member 6 inside the swing base 2 and the base 1 to slide left and right to achieve linkage. The retaining spring 19 pushes the two limiting protrusions 20 to realize the linkage between the operating rod 18 and the sliding member 6. The linkage structure is simple; furthermore, the distance between the two limiting protrusions 20 is greater than that of the retaining spring 19; the limiting protrusions 20 are provided with a relief groove 21, the depth of which is greater than the radius of the operating rod 18; that is, there is a distance between the retaining spring 19 and the sliding member 6, and there is also a distance between the operating rod 18 and the sliding member 6, so that the sliding member 6 can avoid the operating rod 18 and swing left and right with the swing seat 2; the operating rod 18 and the sliding member 6 are not tightly connected. Since the operating rod 18 is set on the swing seat 2 and the sliding member 6 is set on the base 1, when the swing seat 2 swings, the operating rod 18 will also swing with the sliding member 6. Although the two are linked, there is still a swing margin required.

[0045] Example 2: The only difference between this example and Example 1 is the linkage structure between the operating lever 18 and the sliding member 6. Specifically:

[0046] like Figures 11-13 As shown, the operating lever 18 is located above the sliding member 6. The operating lever 18 is provided with a bolt 22, and the sliding member 6 is provided with a receiving hole 23. The bolt 22 is inserted into the receiving hole 23, and the diameter of the receiving hole 23 is larger than the diameter of the bolt 22. Similarly, although the operating lever 18 and the sliding member 6 are linked, they still have a swing margin under the action of the bolt 22 and the receiving hole 23.

Claims

1. A tray characterized in that, The base and the swing base are connected by a swing shaft arranged in the front-back direction, one of the base and the swing base is provided with a slidingly arranged locking pin, the other of the base and the swing base is provided with a locking hole, the locking hole is located on the sliding path of the locking pin, when the locking pin enters the locking hole, the base and the swing base are locked and relatively stationary, when the locking pin leaves the locking hole, the swing base can swing left and right relative to the base; one of the base and the swing base is further provided with a slidingly arranged sliding member, the sliding member is provided with a guide groove, a transmission member is arranged between the sliding member and the locking pin, one end of the transmission member is arranged in the guide groove, and the other end of the transmission member is connected with the locking pin; when the sliding member slides, the transmission member moves under the action of the guide groove and drives the locking pin to move close to or away from the locking hole.

2. The tray of claim 1, wherein: The sliding member slides in the left-right direction, and the path of the guide groove has an included angle relative to the left-right direction.

3. The tray of claim 2, wherein: The transmission member is a torsion spring, the torsion spring is rotatably arranged on the base, one of the torsion arms of the torsion spring is inserted into the guide groove, and the other torsion arm of the torsion spring is inserted into the locking pin.

4. The tray of claim 2, wherein: The swing base is provided with a slidingly arranged operating rod, the operating rod is arranged in the left-right direction, and the operating rod is linked with the sliding member.

5. The tray of claim 4, wherein: A clamping spring is arranged on the operating rod, two left-right spaced limiting protrusions are arranged on the sliding member, the clamping spring is arranged in the two limiting protrusions, and the clamping spring drives the sliding member to slide left and right when the operating rod slides.

6. The tray of claim 5, wherein: The distance between the two limiting protrusions is greater than the clamping spring; the limiting protrusions are provided with a avoiding slot, and the depth of the avoiding slot is greater than the radius of the operating rod.

7. The tray of claim 4, wherein: The operating rod is located above the sliding member, a bolt is arranged on the operating rod, a containing hole is arranged on the sliding member, the bolt is inserted into the containing hole, and the diameter of the containing hole is greater than the diameter of the bolt.

8. The tray of claim 1, wherein: The sliding member is arranged on the front side plate of the base, the sliding member comprises an elastic portion, the elastic portion is provided with a gear protrusion, a containing groove is arranged on the front side plate, and the gear protrusion is arranged in the containing groove; a locking gear slot and an unlocking gear slot are further arranged in the containing groove, and the locking gear slot and the unlocking gear slot are arranged in the sliding direction of the sliding member; when the sliding member slides, the elastic portion elastically deforms and makes the gear protrusion switch between the locking gear slot and the unlocking gear slot.

9. The tray of claim 1, wherein: The locking hole is arranged on the front end plate of the swing base, and the locking pin is slidingly arranged on the base and arranged in the front-back direction; the base is provided with at least two locking pins, and the two locking pins are arranged left and right.

10. The tray of claim 1, wherein: The swing base is provided with a seat connecting member, an inclination shaft is arranged between the seat connecting member and the swing base, and the seat connecting member is rotatably arranged on the swing base through the inclination shaft.

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