CN217658864U - Headrest adjusting device of seat - Google Patents

Abstract

The utility model discloses a headrest adjusting device of a seat, which comprises a headrest component and a backrest component; the headrest component comprises a headrest main body and a sliding support plate; a depth adjusting mechanism is arranged between the headrest main body and the sliding support plate; the depth adjusting mechanism comprises a sliding rod arranged on the headrest main body and a sliding matching part arranged at the upper end of the sliding support plate; the sliding rod is slidably arranged in the sliding matching part in a penetrating way; the sliding fit part is provided with an adjusting button with an avoiding hole, the sliding rod is provided with a plurality of spaced clamping grooves, and a locking clamping block is arranged at the avoiding hole; the locking clamping block is clamped with the clamping groove so that the headrest main body and the sliding support plate are locked front and back; the adjusting button is pressed to enable the locking clamping block to exit from the clamping groove, and the sliding rod slides forwards and backwards to drive the headrest main body to move; a longitudinal supporting beam is arranged in the middle of the backrest component, and a sliding groove which can be in sliding fit with the sliding supporting plate is arranged at the upper end of the supporting beam; the sliding support plate slides up and down along the sliding groove to drive the headrest main body to move up and down.

Description

Headrest adjusting device of seat

Technical Field

The utility model relates to a thing to sit on field, in particular to thing to sit on headrest adjusting device.

Background

The chair is one of tools which are used for the longest time for working and learning of people, and before requirements on the attractiveness of the chair are made, the chair is more important to ensure good comfort, the neck of people can be protected by the chair with the headrest, the fatigue of the neck after long-time sitting is relieved, and the risk of cervical spondylosis is reduced; however, since the headrest height is required for people of different heights sitting on the seat, the height of the headrest needs to be adjustable. However, most of the existing seat headrests only have an up-down adjustment function, but users in different sitting postures such as sitting posture forward or sitting posture backward also need to be able to adjust the headrest forward and backward to further provide head support.

The headrest adjusting device of the seat on the market at present is complex in structure or inconvenient to operate and install. In the headrest adjusting device, the double screws below the headrest are inserted into the backrest to achieve the purpose of adjusting the height, and although the headrest can be adjusted up and down, the headrest can be adjusted only in the vertical direction by adopting the structure, and the headrest is difficult to be adjusted in the front-back direction; even if adjustable, the front-to-back adjustment range of the headrest is relatively limited. For example, the headrest can be adjusted forwards and backwards, most of the seats only rotate forwards and backwards or stretch forwards and backwards through the headrest to achieve the function of adjusting the headrest forwards and backwards, so that the headrest adjusting range is limited, the position feeling is not obvious, repeated adjustment is needed in each use, and memory adjustment cannot be achieved.

Disclosure of Invention

The utility model overcomes the defects in the prior art and aims to provide a headrest adjusting device of a seat; the headrest main body can be adjusted back and forth through the depth adjusting mechanism between the headrest main body and the supporting plate; when the adjustment is carried out, only the adjusting button needs to be pressed, and the sliding rod is also provided with a plurality of clamping grooves, so that a plurality of adjusting positions are arranged, the adjusting range is larger, and the adjustment is accurate; the user adjusts to suitable draw-in groove position at every turn, can adjust the headrest to suitable degree of depth fast.

The technical scheme of the utility model is realized like this:

a headrest adjusting device of a seat, comprising: a headrest assembly disposed on the backrest assembly; the headrest assembly comprises a headrest main body and a support plate which is longitudinally arranged behind the headrest main body, and the support plate is arranged on the backrest assembly; a depth adjustment mechanism provided between the headrest main body and the support plate; the depth adjusting mechanism comprises a sliding rod which is arranged on the headrest main body and extends backwards, and a sliding matching part which is correspondingly arranged at the upper end of the supporting plate; the sliding rod is slidably arranged in the sliding matching part in a penetrating way; an adjusting button capable of being elastically pressed is arranged on the sliding matching part, an avoiding hole through which an avoiding sliding rod passes is formed in the adjusting button, a plurality of spaced clamping grooves are formed in the sliding rod along the length direction of the sliding rod, and a locking clamping block capable of being in clamping fit with the clamping grooves is arranged at the avoiding hole; in the locking state, the locking clamping block is clamped with the clamping groove so that the headrest main body and the supporting plate are locked front and back; in the unlocking state, the adjusting button is pressed to enable the locking clamping block to exit from the clamping groove, and the sliding rod slides forwards and backwards relative to the sliding matching part to drive the headrest main body to move forwards and backwards.

Preferably, the sliding fit part is provided with a mounting groove with an upward opening, and the adjusting button is embedded in the mounting groove; the locking clamping block is arranged at the lower end of the avoiding hole, and acts on the adjusting button to move downwards to drive the locking clamping block to move downwards and exit from the clamping groove in an unlocking state.

Preferably, the adjusting button can slide up and down relative to the sliding fit part, and a longitudinal spring is arranged between the adjusting button and the sliding fit part; under the locking state, the upper end of the adjusting button is exposed out of the sliding fit part and forms a pressing part; in the unlocking state, the adjusting button downwards presses the spring, and the spring is compressed and deformed to provide the elastic force for the upward reset of the adjusting button. Under the action of the spring, the adjusting button can automatically reset, and the sliding rod can be automatically locked.

Preferably, the sliding rod is a round rod, and the aperture of the avoidance hole is larger than the diameter of the sliding rod; after the locking clamping block moves downwards and exits from the clamping groove, the sliding rod can continuously penetrate through the avoiding hole. Even if the avoiding hole moves downwards, the sliding rod can still slide through the avoiding hole, and the sliding of the sliding rod relative to the adjusting button is not influenced.

Preferably, the adjusting button is in longitudinal sliding fit with the sliding fit part, two vertical sliding strips are arranged in the mounting groove, and a vertical guide groove is correspondingly arranged at the bottom of the adjusting button. The adjusting button can only move up and down relative to the sliding fit part, so that the control is more stable and errors can be avoided.

Preferably, the sliding rods are arranged at left and right intervals; and the rear ends of the two sliding rods are provided with vertical U-shaped handles so that the rear ends of the two sliding rods form a closed loop. The two sliding rods are arranged, so that the headrest main body slides forwards and backwards more stably; and the U-shaped handle is convenient for a person to hold and control by hands, the operation is more convenient, and the rear end of the sliding rod is closed-loop to limit the sliding rod to be separated from the sliding matching part.

Preferably, the two sliding rods are of an integrally molded structure. The processing is convenient.

Preferably, a longitudinal supporting beam is arranged in the middle of the backrest assembly, and a sliding groove which can be in sliding fit with the supporting plate is arranged at the upper end of the supporting beam; the supporting plate slides up and down along the sliding groove to drive the headrest main body to move up and down. The height of the headrest assembly can be further adjusted.

Preferably, the support beam has a plate-like structure, and a front mounting plate is provided on a front end surface of an upper end of the support beam, and the sliding groove is formed between the front mounting plate and the support beam. The front mounting plate is arranged to form a sliding groove matched with the supporting plate, and the front mounting plate is ingenious in design and simple in structure.

Preferably, the rear end face of the support beam is provided with a mounting hole with internal threads, and an adjusting knob is connected in the mounting hole; the adjusting knob comprises a knob exposed at the rear end of the supporting beam and a rotating rod in a screw rod structure, and the rotating rod rotates along with the knob and moves back and forth; the front end of the rotating rod penetrates through the mounting hole and can be extruded to act on the supporting plate; the rotating rod is configured to move back and forth to enable the supporting plate and the front mounting plate to be in press fit or relatively loosened. By utilizing a thread rotation principle, the rotating rod can be controlled to move back and forth only by rotating the knob, so that the rotating rod is controlled to move forward to extrude the supporting plate to be in compression fit with the front mounting plate, and the sliding mounting plate is kept fixed in the vertical direction under the action of friction force; the rotating rod is controlled to move backwards to enable the sliding mounting plate to be loosened relative to the front mounting plate, so that the sliding mounting plate can slide up and down to adjust the height of the headrest main body; simple structure and convenient operation.

Adopted above-mentioned technical scheme the utility model discloses a design departure point, theory and beneficial effect are:

firstly, the headrest adjusting device of the seat of the utility model can adjust the headrest main body back and forth through the depth adjusting mechanism between the headrest main body and the supporting plate; when the headrest main body is adjusted, the adjusting button is pressed downwards, and then the sliding rod is controlled to slide forwards and backwards relative to the sliding matching part, so that the front and back positions of the headrest main body can be adjusted, and the operation is convenient and quick; the sliding rod is provided with a plurality of clamping grooves, so that a plurality of adjusting positions are arranged, the adjusting range is larger, and the adjustment is accurate; the user only needs to remember the approximate card slot position, and the headrest can be accurately adjusted to the proper depth each time.

Furthermore, the adjusting button is arranged on the sliding fit part, and the spring is arranged between the adjusting button and the sliding fit part, so that the adjusting button can stretch and retract in the longitudinal direction relative to the sliding fit part; the upper end of the adjusting button is exposed outside the sliding fit part to form a pressing part, and then the sliding unlocking of the sliding rod can be realized only by downwards extruding the pressing part; when the pressing part is loosened, the adjusting button can automatically move upwards to reset under the action of the elastic force of the spring, and the sliding rod is locked again; the operation is very simple and labor-saving.

Secondly, the headrest assembly is assembled on a support beam on the backrest assembly in a sliding mode through a support plate, the support beam is of a backrest assembly structure, and the structure of the backrest assembly is reasonably utilized; the supporting plate is more like an extending part of the supporting beam visually, so that the headrest assembly is not abrupt in shape, the structural integrity between the headrest body and the backrest assembly is good, and the headrest assembly is attractive in appearance.

Drawings

Fig. 1 is a schematic perspective view of a headrest assembly connected to a backrest assembly according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a headrest assembly according to an embodiment of the present invention;

fig. 3 is a schematic perspective view of an embodiment of the present invention illustrating a three-dimensional structure of an adjustment button engaged with a slide bar;

fig. 4 is a cross-sectional view of the sliding engagement portion engaging with the sliding bar in the embodiment of the present invention;

fig. 5 is a schematic perspective view illustrating the supporting plate and the backrest module according to an embodiment of the present invention;

fig. 6 is a schematic perspective view illustrating a connection between a front mounting plate and a support beam according to an embodiment of the present invention;

fig. 7 is a schematic perspective view illustrating a connection between an adjusting knob and a support beam according to an embodiment of the present invention;

fig. 8 is a schematic view of a three-dimensional structure of the adjusting knob and the supporting plate in the embodiment of the present invention.

The figures are numbered: a headrest assembly 1; a backrest assembly 2; a headrest body 3; a support plate 4; a slide-fit portion 4a; a slide lever 5; an adjustment button 6; a pressing portion 6a; a relief hole 7; a card slot 8; locking the fixture block 9; a support beam 10; a chute 11; a mounting groove 12; a spring 13; a U-shaped handle 14; a slide bar 15; a guide groove 16; a front mounting plate 17; the connection bumps 17a; mounting holes 18; an adjustment knob 19; a knob 19a; the rotating rod 19b; a limiting guide groove 20; the ribs 21 are pressed.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In the description of the present invention, the term "at least one" means one or more unless explicitly defined otherwise. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The present embodiment is described in relation to reference orientations of respective parts, such as front and rear, in a state where a user normally uses the seat after sitting on the seat.

The utility model discloses a specific embodiment as follows:

as shown in fig. 1 to 8, the present invention provides a headrest adjusting device for a seat, which includes a headrest assembly 1, the headrest assembly 1 being disposed on a backrest assembly 2; the headrest assembly 1 includes a headrest body 3 and a support plate 4 disposed longitudinally behind the headrest body 3. Wherein a depth adjusting mechanism is arranged between the headrest main body 3 and the support plate 4, and comprises a sliding rod 5 which is arranged on the headrest main body 3 and extends backwards, and a sliding matching part 4a which is correspondingly arranged at the upper end of the support plate 4; the sliding rod 5 is slidably arranged in the sliding matching part 4a in a penetrating way; an adjusting button 6 capable of being elastically pressed is arranged on the sliding matching part 4a, an avoiding hole 7 for avoiding the sliding rod 5 to penetrate through is formed in the adjusting button 6, a plurality of spaced clamping grooves 8 are formed in the sliding rod 5 along the length direction of the sliding rod, and a locking clamping block 9 capable of being clamped with the clamping grooves 8 is arranged at the avoiding hole 7; in a locking state, the locking clamping block 9 is clamped with the clamping groove 8 to limit the sliding rod 5 to slide, so that the headrest main body 3 and the support plate 4 are locked front and back; in the unlocking state, the adjusting button 6 is pressed to enable the locking clamping block 9 to exit from the clamping groove 8, and the sliding rod 5 slides forwards and backwards relative to the sliding matching part 4a to realize the forward and backward movement adjustment of the headrest main body 3. In addition, a longitudinal supporting beam 10 is arranged at the middle position of the backrest assembly 2, and the upper end of the supporting beam 10 is provided with a sliding groove 11 which can be in sliding fit with the supporting plate 4; the support plate 4 moves up and down along the support beam 10 to move the headrest body 3 up and down. Through the structure, the headrest main body 3 can be adjusted back and forth and up and down, so that the headrest main body 3 can meet the use requirements of different people; and the structure of the backrest component 2 is skillfully utilized to enable the supporting plate 4 to be in sliding fit on the supporting beam 10, so that the structure is not obtrusive and the structural integrity is good.

As shown in fig. 1 to 4, the two sides of the headrest body 3 are both provided with the sliding rods 3, and the two sliding rods 3 are both slidably inserted into the slidably fitting portions 4a, so that the headrest body 3 slides forward and backward more stably; further, the two sliding rods 3 are of an integrally formed structure, and a vertical U-shaped handle 14 is arranged between the rear ends of the two sliding rods 3, so that the rear ends of the two sliding rods 3 form a closed loop. So that the sliding rod 3 can not be separated from the sliding fit part 4a, and the U-shaped handle 14 is convenient for the user to directly hold and drive the sliding rod 3 to move, so that the adjustment is more convenient.

As shown in fig. 2-4, an installation groove 12 with an upward opening is provided at the middle position of the sliding fit portion 4a, and the adjusting button 6 is embedded in the installation groove 12; and the part of the adjusting button 6 exposed out of the sliding matching part 4a upwards forms a pressing part 6a; specifically, the method comprises the following steps: the adjusting button 6 is in longitudinal sliding fit with the sliding fit part 4a, two vertical sliding strips 15 are arranged in the mounting groove 12, and a vertical guide groove 16 is correspondingly arranged at the bottom of the adjusting button 6; the adjusting button 6 is inserted into the mounting groove 12 to make the sliding strip 15 slide-fit in the guide groove 16, so that the adjusting button 6 can only move in the vertical direction relative to the sliding fit part 4a, and the structure is stable. As shown in fig. 3, the locking latch 9 is disposed at the lower end of the avoiding hole 7, a longitudinal spring 13 is further disposed between the adjusting button 6 and the sliding fit portion 4a, and under the action of the spring 13, the pressing portion 6a is exposed outside the sliding fit portion 4a in a free state; the locking clamping block 9 is just clamped upwards in the clamping groove 8, so that the sliding rod 5 and the sliding matching part 4a are locked in a sliding mode; the locking block 9 is made of metal, so that the strength is high and the locking block is more durable. If the sliding rod 5 needs to be unlocked, the pressing part 6a is pressed downwards to enable the adjusting button 6 to move downwards relative to the sliding matching part 4a, the locking fixture block 9 is separated from the clamping groove 8 downwards, the sliding rod 5 is a circular tube, and the aperture of the avoiding hole 7 is larger than the diameter of the sliding rod 5, so that the sliding rod 6 can still slide through the avoiding hole 7 even if the avoiding hole 7 moves downwards; after that, the front and rear positions of the headrest body 3 can be adjusted by controlling the sliding rod 5 to slide back and forth, and after the adjustment is completed, the pressing part 6a is released again, and the adjusting button 6 automatically returns upward under the action of the spring 13, and locks the sliding rod 5 again. Then, through the structure, the front position and the rear position of the headrest main body 3 can be conveniently adjusted, and the sliding rod 5 is provided with the plurality of clamping grooves 8, so that the adjustment is more accurate, and the position sense is clearer; during adjustment, only the pressing part 6a needs to be pressed downwards, and the operation is very convenient.

As shown in fig. 5-8, the supporting beam 10 is a plate-shaped structure, a front mounting plate 17 is provided at the front upper end of the supporting beam 10, connecting lugs 17a protruding backwards are provided at both sides of the front mounting plate 17, and the connecting lugs 17a are fixed on the supporting beam 10 by screw connection; the sliding groove 11 is formed between the front mounting plate 17 and the supporting beam 10, the supporting plate 4 can be inserted into the sliding groove 11 downwards, and the supporting plate 4 can slide up and down along the sliding groove 11, so that the height of the headrest main body 3 can be adjusted; specifically, the method comprises the following steps: as shown in fig. 7 and 8, a mounting hole 18 with internal threads is formed on the rear end surface of the support beam 10, and an adjusting knob 19 is connected in the mounting hole 18; wherein the adjusting knob 19 comprises a knob 19a exposed at the rear end of the support beam 10 and a rotating rod 19b rotating synchronously with the knob 19a, and the rotating rod 19b is a screw rod; the rotating rod 19b is screwed in the mounting hole 18, and the rotating rod 19b penetrates out of the mounting hole 18; turning the knob 19a in turn can control the turning rod 19b to move back and forth. As shown in fig. 3, 5 and 8, a longitudinal limiting guide groove 20 is formed on the back surface of the supporting plate 4, and the rotating rod 19b penetrates through the mounting hole 18 and is located in the limiting guide groove 20.

The adjusting knob 19 is configured to move back and forth to act on the support plate 4 to press the support plate 4 into fit with the front mounting plate 17; the method specifically comprises the following steps: the rotating rod 19b is positioned in the limiting guide groove 20, and the end part of the rotating rod 19b is abutted against the supporting plate 4; the rotating rod 19b is rotated forwards and extends out by rotating the knob 19a, so that the rotating rod 19b can push the support plate 4 forwards to be in press fit with the front mounting plate 17, the support plate 4 is fixed relative to the front mounting plate 17 under the action of sliding friction force, and the headrest body 3 stays at the adjusted height; as shown in fig. 6, a plurality of longitudinally spaced extrusion convex strips 21 are arranged at the rear end of the front mounting plate 17, so that the front mounting plate 17 and the support plate 4 are pressed tightly to achieve a better extrusion effect, and the sliding friction force between the front mounting plate and the support plate is larger; so that the supporting plate 4 can be kept stable in the vertical direction, and the structural stability is better. On the contrary, when the height of backup pad 4 needs to be adjusted, only need reverse rotation knob 19a, make dwang 19b remove backward, make and loosen relatively between backup pad 4 and the preceding mounting panel 17, the extrusion power between the two diminishes, sliding friction diminishes to can reciprocate backup pad 4 with the height of adjusting headrest main part 3, adjust after accomplishing rotate knob 19a once more can, the operation is very convenient simple. And the rotating rod 19b is positioned in the limiting guide groove 20, so that the effect of extruding the supporting plate 4 by the rotating rod 19b is better, and the vertical adjusting range of the supporting plate 4 can be effectively limited.

In summary, in the headrest adjusting device of the seat of the present invention, the headrest main body 3 can be adjusted back and forth by the depth adjusting mechanism between the headrest main body 3 and the supporting plate 4; when in adjustment, only the adjusting button needs to be pressed, and the sliding rod 5 is provided with a plurality of clamping grooves, so that a plurality of adjusting positions are arranged, the adjusting range is larger, and the adjustment is accurate; secondly, the headrest assembly is assembled on the support beam 10 on the backrest assembly 2 in a sliding mode through the support plate 4, and the structure of the backrest assembly 2 is reasonably utilized; so that the supporting plate 4 is more like an extension part of the supporting beam 10 from the view point, and the structural integrity is good; the headrest component 1 is not obtrusive in shape.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims (10)

1. A headrest adjusting device of a seat, characterized by comprising:

a headrest assembly disposed on the backrest assembly; the headrest assembly comprises a headrest main body and a support plate which is longitudinally arranged behind the headrest main body, and the support plate is arranged on the backrest assembly;

a depth adjusting mechanism disposed between the headrest main body and the support plate; the depth adjusting mechanism comprises a sliding rod which is arranged on the headrest main body and extends backwards, and a sliding matching part which is correspondingly arranged at the upper end of the supporting plate; the sliding rod is slidably arranged in the sliding matching part in a penetrating way; an adjusting button capable of being elastically pressed is arranged on the sliding matching part, an avoiding hole through which the avoiding sliding rod passes is formed in the adjusting button, a plurality of spaced clamping grooves are formed in the sliding rod along the length direction of the sliding rod, and a locking clamping block capable of being in clamping fit with the clamping grooves is arranged at the avoiding hole; in a locking state, the locking clamping block is clamped with the clamping groove so that the headrest main body and the supporting plate are locked front and back; in an unlocking state, the adjusting button is pressed to enable the locking clamping block to exit the clamping groove, and the sliding rod slides forwards and backwards relative to the sliding matching part to drive the headrest main body to move forwards and backwards.

2. Headrest adjusting means of the seat according to claim 1, characterized in that: the sliding fit part is provided with a mounting groove with an upward opening, and the adjusting button is embedded in the mounting groove; the locking fixture block is arranged at the lower end of the avoiding hole, and acts on the adjusting button to move downwards to drive the locking fixture block to move downwards and exit from the clamping groove in an unlocking state.

3. The headrest adjusting apparatus for seats of claim 2, characterized in that: the adjusting button can slide up and down relative to the sliding fit part, and a longitudinal spring is arranged between the adjusting button and the sliding fit part; under the locking state, the upper end of the adjusting button is exposed out of the sliding fit part and forms a pressing part; in the unlocking state, the adjusting button downwards presses the spring, and the spring is compressed and deformed to provide the elastic force for the upward reset of the adjusting button.

4. The headrest adjusting apparatus for seats of claim 2, characterized in that: the sliding rod is a round rod, and the aperture of the avoidance hole is larger than the diameter of the sliding rod; after the locking clamping block moves downwards and exits from the clamping groove, the sliding rod can continuously penetrate through the avoiding hole.

5. A headrest adjusting apparatus for seats according to claim 3, characterized in that: adjusting button and the vertical sliding fit of sliding fit portion are equipped with two vertical draw bars in the mounting groove adjusting button's bottom correspond and be equipped with vertical guide way.

6. Headrest adjusting device of seating furniture according to claim 1, characterized in that: the two sliding rods are arranged at left and right intervals; and the rear ends of the two sliding rods are provided with vertical U-shaped handles so that the rear ends of the two sliding rods form a closed loop.

7. Headrest adjusting device of seating furniture according to claim 6, characterized in that: the two sliding rods are of an integrally formed structure.

8. Headrest adjusting device of seating furniture according to claim 1, characterized in that: a longitudinal supporting beam is arranged in the middle of the backrest component, and a sliding groove which can be in sliding fit with the supporting plate is arranged at the upper end of the supporting beam; the supporting plate slides up and down along the sliding groove to drive the headrest main body to move up and down.

9. The headrest adjusting apparatus for seats of claim 8, wherein: the supporting beam is of a plate-shaped structure, a front mounting plate is arranged on the front end face of the upper end of the supporting beam, and the sliding groove is formed between the front mounting plate and the supporting beam.

10. Headrest adjusting device of seating furniture according to claim 9, characterized in that: the rear end face of the supporting beam is provided with a mounting hole with internal threads, and an adjusting knob is connected in the mounting hole; the adjusting knob comprises a knob exposed at the rear end of the supporting beam and a rotating rod in a screw rod structure, and the rotating rod rotates along with the knob and moves back and forth; the front end of the rotating rod penetrates through the mounting hole and can be extruded to act on the supporting plate; the rotating rod is configured to move back and forth to enable the supporting plate and the front mounting plate to be in press fit or relatively loosened.

Images