A headrest

Abstract

The utility model discloses a telescopic headrest, including installing on the backrest outer tube, the inner tube of slidable in the outer tube, the inner tube upper end is equipped with the headrest support plate, and the outer tube lower extreme fixed connection one vertical rod, and vertical rod is located the inside of inner tube, and the inner tube lower part is equipped with one locking chain, and the locking chain includes the chain plate and the pin shaft of connecting chain plate, and with the first spring of being arranged on the pin shaft, and the locking chain is sleeved on the vertical rod, and the pin shaft is alternately arranged on both sides of vertical rod, and the first spring makes the locking chain have the tendency of elongation, under the condition of not being forced, and the pin shaft and vertical rod both sides abut, and the pin shaft clamps the vertical rod, makes the inner tube not to slide, and the transmission rod is equipped above the locking chain in the inner tube, and the transmission mechanism is equipped on the inner tube upper end, when the pin shaft and vertical rod are separated when the transmission mechanism is down and presses the transmission rod and makes the locking chain be compressed, now the inner tube can slide up and down. The utility model inner tube can slide in the telescopic range arbitrary position, realizes the headrest height stepless regulation.

Description

Technical Field

[0001] This utility model relates to a telescopic headrest, and more particularly to a telescopic headrest. Background Technology

[0002] The existing headrest height adjustment on chair backs usually involves multiple slots on the headrest's lifting rod. The locking piece on the backrest engages with these slots, thus the height adjustment can only be determined in segments, and the adjustment range is limited to fixed levels, not stepless adjustment. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a telescopic headrest.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a telescopic headrest, comprising an outer tube installed on the backrest, an inner tube that can slide inside the outer tube, a headrest support plate at the upper end of the inner tube, a vertical rod fixedly connected to the lower end of the outer tube, and the vertical rod located inside the inner tube, a locking chain at the lower part of the inner tube, the locking chain comprising a chain plate and a pin connecting the chain plate, and a first spring wound around the pin, the locking chain being sleeved on the vertical rod, the pin being alternately arranged on both sides of the vertical rod, and the first spring causing the locking chain to have a tendency to extend. When no force is applied, the pin and both sides of the vertical rod abut against each other, the pin clamping the vertical rod, preventing the inner tube from sliding. A transmission rod is provided inside the inner tube and above the locking chain, and a transmission mechanism is provided at the upper end of the inner tube. When the transmission mechanism presses down on the transmission rod to compress the locking chain, the pin and the vertical rod disengage, at which time the inner tube can slide up and down.

[0005] The inner tube has a base at its upper end. The transmission mechanism includes a pressure plate pivotally connected to the base at one end and a movable pin at the upper end of the transmission tube. The pressure plate has a through hole in the middle. The upper end of the movable pin passes through the through hole and has a boss at its lower end. The boss cannot pass through the through hole.

[0006] The movable pin is provided with a guide groove, and the corresponding base is provided with a guide pin whose end is located in the guide groove. When the movable pin moves up and down, the guide pin slides in the guide groove to restrict the rotation of the guide pin.

[0007] The headrest support plate and the base are rotatably connected. The headrest support plate is provided with a limiting groove and a support block. When the headrest support plate faces the front of the chair back, the upper end of the movable pin is located in the limiting groove to restrict the headrest support plate from flipping backward, and the support block is located at the upper end of the base to restrict the headrest support plate from flipping forward.

[0008] The upper part of the movable pin is provided with a horizontal pin, and the headrest support plate is provided with a locking block and a limiting plate. When the headrest support plate faces the back of the chair, the locking block and the horizontal pin abut against each other to restrict the headrest support plate from flipping forward. The limiting plate is located at the upper end of the base to restrict the headrest support plate from flipping backward excessively.

[0009] The lower end of the inner tube is provided with a block, and the block is provided with a limiting groove for limiting the lowermost pin of the locking chain.

[0010] The beneficial effects of this utility model are as follows: This utility model controls the locking chain to clamp or the anti-loosening vertical rod through the transmission mechanism. When the locking chain is released, the inner tube can slide at any position within the extension range, realizing stepless adjustment of the headrest height. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a cross-sectional view of the present invention;

[0013] Figure 3 for Figure 2 The unlocked state diagram;

[0014] Figure 4 This is a schematic diagram of the locking chain structure of this utility model;

[0015] Figure 5 This is a schematic diagram illustrating the locking and unlocking of the locking chain according to this utility model;

[0016] Figure 6 This is a schematic diagram of the transmission mechanism structure of this utility model;

[0017] Figure 7 This is a diagram showing the headrest support plate of this utility model in use;

[0018] Figure 8 This is another usage diagram of the headrest support plate of this utility model;

[0019] Figure 9 This is a diagram showing the headrest support plate of this utility model when it is not in use;

[0020] Figure 10 This is another view of the headrest support plate of this utility model when it is not in use;

[0021] Figure 11 This is a schematic diagram of the headrest support plate structure of this utility model. Detailed Implementation

[0022] like Figures 1-10As shown, a telescopic headrest includes an outer tube 10 mounted on the backrest and an inner tube 20 that can slide within the outer tube 10. A headrest support plate 30 is provided at the upper end of the inner tube 20, and a headrest (not shown in the figure) covers the headrest support plate 30. A vertical rod 11 is fixedly connected to the lower end of the outer tube 10, and the vertical rod 11 is located inside the inner tube 20. A locking chain 21 is provided at the lower part of the inner tube 20. The locking chain 21 includes a chain plate 211, a pin 212 connecting the chain plate 211, and a first spring 213 wound around the pin 212. The locking chain 21 is sleeved on... On the vertical rod 11, the pins 212 are alternately arranged on both sides of the vertical rod 11, and the first spring 213 causes the locking chain 21 to tend to extend. When no force is applied, the pins 212 abut against both sides of the vertical rod 11, clamping the vertical rod 11 and preventing the inner tube 20 from sliding. A transmission rod 22 is provided inside the inner tube 20 and above the locking chain 21, and a transmission mechanism 23 is provided at the upper end of the inner tube 20. When the transmission mechanism 23 presses down on the transmission rod 22, compressing the locking chain 21, the pins 212 and the vertical rod 11 disengage, and the inner tube 20 can then slide up and down. In this embodiment, the lower end of the outer tube 10 is connected to a connecting block by screws, and the vertical rod 11 is welded to the connecting block.

[0023] The inner tube 20 has a base 24 at its upper end. The transmission mechanism 23 includes a pressure plate 231 pivotally connected to the base 24 at one end and a movable pin 232 at the upper end of the transmission tube. The pressure plate 231 has a through hole 233 in the middle. The upper end of the movable pin 232 passes through the through hole 233, and a boss 234 is provided at its lower end. The boss 234 cannot pass through the through hole 233. In this embodiment, the other end of the pressure plate 231 is connected to a handle 235. A second spring 236 is provided at the bottom of the movable pin 232, and a third spring 237 is sleeved on the upper end of the transmission rod 22 so that the movable pin 232 and the transmission rod 22 quickly return to their original positions after being released.

[0024] The movable pin 232 is provided with a guide groove 238, and the corresponding base 24 is provided with a guide pin 241 whose end is located in the guide groove 238. When the movable pin 232 moves up and down, the guide pin 241 slides in the guide groove 238 to restrict the rotation of the guide pin 241.

[0025] When the telescopic headrest of this invention is used in a barber chair, there is a need to switch the headrest, such as when shaving, but not when cutting hair. Therefore, the headrest needs to be designed to be flip-up. The headrest support plate 30 and the base 24 are rotatably connected. In this embodiment, the headrest support plate 30 has connecting plates 35 on both sides of the base 24, and a rotating shaft passes through the connecting plates 35 and the base 24 to connect the headrest support plate 30 and the base 24.

[0026] The headrest support plate 30 is provided with a limiting groove 31 and a support block 32. When the headrest support plate 30 faces the front side of the chair back, the upper end of the movable pin 232 is located in the limiting groove 31 to restrict the headrest support plate 30 from flipping backward, and the support block 32 is located on the upper end of the base 24 to restrict the headrest support plate 30 from flipping forward.

[0027] The upper part of the movable pin 232 is provided with a horizontal pin 239, and the headrest support plate 30 is provided with a locking block 33 and a limiting plate 34. When the headrest support plate 30 faces the back of the chair, the locking block 33 and the horizontal pin 239 abut against each other to restrict the headrest support plate 30 from flipping forward. The limiting plate 34 is located at the upper end of the base 24 to restrict the headrest support plate 30 from flipping backward excessively.

[0028] The lower end of the inner tube 20 is provided with a block 25, and the block 25 is provided with a limiting groove 251 for limiting the lowermost pin 212 of the locking chain 21.

[0029] In use, pressing the handle 235 of the pressure plate 231 causes the pressure plate 231 to rotate downwards, which in turn drives the movable pin 232 to press down the transmission rod 22, thus unlocking the locking chain 21. Adjusting the extension and retraction length of the inner tube 20, and releasing the handle, the locking chain 21 relocks the vertical rod 11. When adjusting the headrest, press the handle 235 with one hand to disengage the movable pin 232 downwards from the limiting groove 31, and use the other hand to pry the headrest backwards. After prying it into place, release the handle, the movable pin 232 returns to its original position, and the horizontal pin 239 abuts to prevent the headrest from flipping forward.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Simple modifications and substitutions made by those skilled in the art without departing from the spirit and scope of this utility model are within its protection scope.

Claims

1. A telescopic headrest, comprising an outer tube mounted on a chair back, an inner tube slidable within the outer tube, wherein a headrest support plate is provided at the upper end of the inner tube, characterized in that, A vertical rod is fixedly connected to the lower end of the outer tube, and the vertical rod is located inside the inner tube. A locking chain is provided at the lower part of the inner tube. The locking chain includes a chain plate and a pin connecting the chain plate, as well as a first spring wound around the pin. The locking chain is sleeved on the vertical rod. The pin is alternately arranged on both sides of the vertical rod, and the first spring causes the locking chain to have an elongation tendency. When no force is applied, the pin and both sides of the vertical rod abut against each other, and the pin clamps the vertical rod, preventing the inner tube from sliding. A transmission rod is provided inside the inner tube and above the locking chain. A transmission mechanism is provided at the upper end of the inner tube. When the transmission mechanism presses down on the transmission rod to compress the locking chain, the pin and the vertical rod disengage, and the inner tube can slide up and down at this time.

2. A telescopic headrest as described in claim 1, characterized in that, The inner tube has a base at its upper end. The transmission mechanism includes a pressure plate pivotally connected to the base at one end and a movable pin at the upper end of the transmission tube. The pressure plate has a through hole in the middle. The upper end of the movable pin passes through the through hole and has a boss at its lower end. The boss cannot pass through the through hole.

3. A reclining headrest as claimed in claim 2, wherein, The movable pin is provided with a guide groove, and the corresponding base is provided with a guide pin whose end is located in the guide groove. When the movable pin moves up and down, the guide pin slides in the guide groove to restrict the rotation of the guide pin.

4. A telescopic headrest as described in claim 3, characterized in that, The headrest support plate and the base are rotatably connected. The headrest support plate is provided with a limiting groove and a support block. When the headrest support plate faces the front of the chair back, the upper end of the movable pin is located in the limiting groove to restrict the headrest support plate from flipping backward, and the support block is located at the upper end of the base to restrict the headrest support plate from flipping forward.

5. A reclining headrest as claimed in claim 4, wherein the headrest is formed from a single piece of material. 5 The upper part of the movable pin is provided with a horizontal pin, and the headrest support plate is provided with a locking block and a limiting plate. When the headrest support plate faces the back of the chair, the locking block and the horizontal pin abut against each other to restrict the headrest support plate from flipping forward. The limiting plate is located at the upper end of the base to restrict the headrest support plate from flipping backward excessively.

6. A telescopic headrest as described in claim 1, characterized in that, The lower end of the inner tube is provided with a block, and the block is provided with a limiting groove for limiting the lowermost pin of the locking chain.

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