Hairdressing chair

Abstract

To provide a hairdressing chair that makes it possible to easily adjust a space from a shampoo bowl by new movement.SOLUTION: A hairdressing chair comprises a backrest 1 that is connected behind a seating seat 2 and stands, falls, and rotates. The seating seat rises and retreats with respect to a fixation part 11 to a floor. The backrest falls as the seating seat rises and retreats. The hairdressing chair comprises a tilt regulation unit that when the backrest reaches a position at a predetermined set tilt angle with respect to the seating seat, inhibits the backrest from falling at the set tilt angle or smaller angles even when the seating seat is raised. When a position of the seating seat is further raised from the position at which the backrest reaches the set tilt angle, the seating seat slides forward, which makes the seating seat rise without retreating without changing the set tilt angle of the backrest.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a hairdressing chair. [Background technology]

[0002] Hairdressing chairs are used with a shampoo bowl placed at the rear for shampooing and hair dyeing. In this type of hairdressing chair, the seat slides backwards and the backrest reclines. Therefore, when the seat is positioned at a certain height, the front-to-back position between the shampoo bowl at the rear and the chair can only be set to a certain position, which creates an issue that the customer cannot fine-tune the position to relax. This current mechanism is characterized by being configured so that the initial height is low and the maximum height can be raised to a high position. In addition, when the backrest is relatively upright, there is a space between the chair and the shampoo ball for the therapist to enter, and there is also the advantage that the massage can be given to the massagee from behind. However, when the seat is raised and the backrest is sufficiently reclined and close to the shampoo ball, if the seat is raised a little more, the backrest will reclined further as it rises, and the backrest may interfere with the shampoo ball. On the other hand, if the seat is lowered a little more, the backrest will rise as it descends, and it will be farther away from the shampoo ball. In this way, it was difficult to fine-tune the position to the most relaxing position for the massagee according to the physique of the massagee. Prior art documents relating to this type of hairdressing chair include Patent Documents 1 to 3. Patent document 1 discloses a hairdressing chair that is characterized by being able to stop at a predetermined position close to a shampoo bowl at the rear, and in which only the backrest can be further raised and lowered at the predetermined position behind the shampoo bowl that it has stopped at. Patent document 2 discloses a hairdressing chair in which when the backrest support part moves up relative to the seat support part, the seat support part moves forward relative to the ground contact member, and conversely, when the backrest support part moves down relative to the seat support part, the seat support part moves backward relative to the ground contact member. Patent Document 3 discloses a hairdressing chair in which a lifting section equipped with a parallel link is equipped with a forward / backward movement suppression means for suppressing the backward movement of the seat, and the forward / backward movement suppression means is arranged to be activated while the seat is rising and retreating toward a shampoo ball at the rear, thereby making it possible to set up a section in which the seat rises and retreats and a section in which the seat rises while being suppressed from retreating, and after setting the forward / backward positional relationship between the seat and the shampoo ball, the vertical positional relationship can be adjusted, thereby disclosing a hairdressing chair in which the distance between the shampoo ball and the hairdressing chair, particularly the vertical distance, can be easily adjusted when the hairdressing chair is raised and retreated toward the shampoo ball. However, there was no disclosure of a hairdressing chair in which, even if the seat position is further raised when the backrest has reached a specified set inclination angle suitable for shampooing, the set inclination angle of the backrest relative to the seat does not change and the seat is raised. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4753354 [Patent Document 2] Patent No. 5451526 [Patent Document 3] Patent No. 5451527 Summary of the Invention [Problem to be solved by the invention]

[0004] The problem to be solved by the present invention is to provide a hairdressing chair that allows easy adjustment of the distance from the shampoo ball by a new movement. [Means for solving the problem]

[0005] The present invention improves a hairdressing chair which includes a fixed part that is installed on the floor, a seat that moves up and down and back and forth relative to the fixed part, and a backrest that is connected to the rear of the seat and can be raised and rotated, the seat rising and retreating relative to the fixed part and descending and advancing relative to the fixed part, and the backrest collapsing as the seat rises and retreats and rising as the seat descends and advances. The hairdressing chair of the present invention is provided with an inclination regulating section that, when the backrest reaches a predetermined set inclination angle relative to the seat, prevents the backrest from falling below the set inclination angle even if the seat is raised. When the seat position where the backrest has reached the set inclination angle is further raised, the seat is slid forward, so that the set inclination angle of the backrest does not change and the seat rises without moving backward. The present invention also provides an improvement to a hairdressing chair comprising a fixed part installed on the floor, a seat that moves up and down and back and forth relative to the fixed part, and a backrest connected to the rear of the seat that can be raised and rotated, wherein the seat rises and retreats relative to the fixed part by a parallel link mechanism, and descends and advances relative to the fixed part, and the backrest reclines as the seat rises and retreats, and rises as the seat descends and advances, by a backrest link mechanism that is linked to the parallel link mechanism. The beauty salon chair of the present invention includes a tilt regulating unit that prevents the backrest from tilting below a predetermined tilt angle when the backrest reaches a predetermined tilt angle relative to the seat, even if the seat is raised. The seat is connected to the parallel link mechanism so as to be slidable in the front-rear direction. When the seat is raised by the parallel link mechanism beyond a position where the backrest reaches the predetermined tilt angle relative to the seat, the seat slides forward relative to the parallel link mechanism. Effect of the Invention

[0006] The present invention provides a hairdressing chair that allows easy adjustment of the distance from the shampoo ball through a new movement. [Brief description of the drawings]

[0007] [Figure 1] 1 is a structural explanatory diagram of a hairdressing chair according to an embodiment of the present invention, seen from the side; [Diagram 2] 1A, 1B, and 1C are explanatory diagrams of the operating state of the beauty salon chair as seen from the side. [Diagram 3] (A), (B), and (C) are explanatory diagrams of the operating state of the hairdressing chair viewed from the side, where (A) is an explanatory diagram of the hairdressing chair in the standard position, and (B) is an explanatory diagram of the hairdressing chair undergoing fine adjustment. [Figure 4] (A) is an oblique view of the main parts of the hairdressing chair from the upper rear with the backrest upright, (B) is an enlarged explanatory diagram of the main parts of the tilt control part, and (C) is an oblique view of the main parts of the hairdressing chair from the lower rear with the backrest reclined. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, a hairdressing chair according to an embodiment of the present invention will be described with reference to the drawings. The hairdressing chair according to this embodiment comprises a seat 2 that supports a person's buttocks and thighs, a backrest 1 disposed behind it (left side in Fig. 1), and a kick board 3 disposed in front of it (right side in Fig. 1), and due to the following configuration, it rises and falls, and the backrest 1 tilts and falls relative to the seat 2. In addition, the kick board 3 rotates up and down relative to the seat 2.

[0009] (Base and parallel link) The hairdressing chair is installed on the floor by a base frame 11 as a fixed part, and includes a first link 7 and a second link 8 rotatably connected to the base frame 11 by a node a and a node b, respectively. Unless otherwise specified below, a node means a rotatable connection point. The other ends of the first link 7 and the second link 8 are connected to an upper frame 9 by a node c and a node d, respectively. The length between the node a and the node b is equal to the length between the node c and the node d, and the length between the node a and the node d is equal to the length between the node b and the node c. Therefore, the base frame 11, the first link 7, the second link 8, and the upper frame 9 form a four-joint parallel link mechanism.

[0010] (Operation of the parallel link mechanism) This parallel link mechanism changes the inclination angle using a seat cylinder 10, which is a hydraulic cylinder or the like, as a driving source. The base end of the seat cylinder 10 is connected to the base frame 11 by a joint e, and the tip end of the piston rod is connected to the first link 7 by a joint f. When the piston rod extends, the inclination angle of the first link 7 increases, and when the piston rod contracts, the inclination angle of the first link 7 decreases. Under this operating condition, the upper frame 9 moves parallel to the base frame 11, and the seat 2 moves up and down and back and forth while maintaining a nearly horizontal state. Specifically, as the piston rod of the seat cylinder 10 extends, the first link 7 rotates around the joint b as shown in Figures 2(A) to (C), and the inclination angle increases, and the upper frame 9 and the seat 2 rise and move backwards with the rotation of the first link 7.

[0011] (Sliding and biasing of seat mounting bracket 5) The upper frame 9 is provided with a slide bar 12 on its upper part. A seat mounting bracket 5 is attached to and supported on this slide bar 12 so as to be slidable in the front-rear direction within a predetermined range. This seat mounting bracket 5 is biased rearward by a biasing means such as a gas cylinder 13, and normally, as shown in Figures 2(A)-(C) and Figure 3(A), the seat mounting bracket 5 and the seat 2 fixed thereto are retreated to the rear end of the slide bar 12, but can move forward against the bias to the front end of the slide bar 12 as shown in Figure 3(B).

[0012] (Relationship between seat 2 and backrest 1) The back mounting bracket 4 is connected to the rear end of the seat mounting bracket 5 by joint j, and since the front end of the backrest 1 is fixed to this back mounting bracket 4, the backrest 1 can rotate about joint j relative to the seat 2 and rise or fall. The tip of the back mounting bracket 4 is connected to the tip of the tilt link 6 by joint h, and the base end of the tilt link 6 is connected to the middle of the first link 7 by joint g. 2(A)-(C) and 3(A) is retracted to the rear end of the slide bar 12, a four-joint link mechanism (hereinafter referred to as the backrest link mechanism) is formed with nodes c, g, h, and j, in which the lengths of the four links are kept constant, and as the inclination angle of the first link 7 changes due to the expansion and contraction of the seat cylinder 10, the backrest mounting bracket 4 changes its angle relative to the tilt link 6 and the seat mounting bracket 5. As a result, the backrest 1 rotates about node j relative to the seat 2 and rises or falls. 2(A)-(C) and 3(A), Fig. 2(A) shows the seat cylinder 10 in its most retracted state, with the first link 7 at its gentlest inclination angle and the seat mounting bracket 5 and seat 2 at their lowest and most forward positions. Also, in Fig. 2(A), the angle between the back mounting bracket 4 and the tilt link 6 is the smallest, and the angle between the back mounting bracket 4 and the seat mounting bracket 5 is the largest. The backrest 1 extends at an angle close to a right angle to the plane along which the back mounting bracket 4 extends, so in Fig. 2(A), the backrest 1 is raised to a position close to a right angle to the seat 2. 2(B) and (C) to FIG. 3(A), as the seat cylinder 10 extends, the angle between the back mounting bracket 4 and the tilting link 6 increases, and the angle between the back mounting bracket 4 and the seat mounting bracket 5 decreases, causing the backrest 1 to rotate and tilt to a position close to a right angle relative to the seat 2, assuming an approximately flat position.

[0013] (Relationship between seat 2 and kick plate 3) The base end of the kick board 3 is rotatably attached by joint k to the front end of the seat 2 which is fixed to the seat mounting bracket 5. The kick board 3 is equipped with a kick board arm 15 which extends at a right angle from its rear surface, and the front end of the kick board link 14 is connected by joint i to the tip of this kick board arm 15. The kick board link 14 extends approximately in the front-to-rear direction, and its rear end is connected to the back mounting bracket 4 and the tilt link 6 by joint h. 2(A)-(C) and 3(A) is retracted to the rear end of the slide bar 12, a four-joint link mechanism (kick-off board link mechanism) is formed with nodes h, j, k, and i, where the lengths of the four links are kept constant, and the tilt angle of the first link 7 changes as the seat cylinder 10 expands and contracts, changing the angle between the tilt link 6 and the back mounting bracket 4, causing the kick-off board arm 15 and the kick-off board 3 to change their angles relative to the seat 2 and the seat mounting bracket 5. As a result, the kick-off board 3 rotates up and down relative to the seat 2, centering on node k. To explain more specifically with reference to Figures 2(A)-(C) and Figure 3(A), in Figure 2(A) where the seat cylinder 10 is in its most retracted state, the kick plate 3 is in its lowest position (approximately the 6 o'clock position). 2(B) and (C) to FIG. 3(A), as the seat cylinder 10 extends, the angle of the kick plate arm 15 relative to the seat 2 and the seat mounting bracket 5 increases, and the kick plate 3, which extends approximately perpendicular to the kick plate arm 15, becomes increasingly at an angle relative to the seat 2. In FIG. 3(A), the kick plate 3 is in an approximately flat state, close to 12 o'clock, relative to the seat 2.

[0014] (Fine adjustment in conventional nearly flat state) In conventional beauty and hairdressing chairs, the standard positions of the beauty and hairdressing chair and the shampoo bowl are set so that the head of the person sitting on the beauty and hairdressing chair is positioned at the shampoo bowl (not shown) located at the rear in a nearly flat state as shown in Fig. 3(A). However, depending on the body type of the person, the height of the shampoo bowl may not match the standard position, and fine adjustment may be necessary. However, if the seat cylinder 10 is further extended to raise the seat 2 position, the seat 2 moves backward due to the structure of the parallel link mechanism, the backrest 1 reclins further due to the structure of the backrest link mechanism, and the kick plate 3 rotates further upward due to the structure of the kick plate link mechanism. As a result, it has become difficult to fine-tune the positioning of the shampoo bowl and the head of the person.

[0015] (Regarding the tilt regulation portion 20) Therefore, in this embodiment of the present invention, a tilt regulating portion 20 shown in FIG. 4 is provided so that when the seat cylinder 10 is further extended to reach the standard position of the approximately flat state shown in FIG. 3(A), the angle between the seat 2 and the backrest 1 will not change. As shown in FIG. 4(B), the inclination regulating portion 20 in this embodiment has a female thread portion 21 and a male thread portion 22 that screws into the female thread portion 21, and an abutment portion 23 is provided at the tip of the male thread portion 22. The female thread portion 21 is fixed to approximately the center in the left-right direction of the plate-shaped back mounting bracket 4, and when the backrest 1 is tilted to a predetermined angle relative to the seat 2, the abutment portion 23 comes into contact with the seat mounting bracket 5 on the underside of the seat 2, thereby restricting the backrest from tilting any further. By rotating the male thread portion 22, the length of protrusion from the female thread portion 21 can be changed, and the restricted angle of tilt can be adjusted. As shown in Figures 4(B) and (C), in this embodiment, the tilt link 6, kick plate link 14, first link 7, etc. are provided in pairs on the left and right, or are tubular with a width in the left and right direction, thereby improving stability in the left and right direction. It is also preferable to connect the left and right members with a connecting member 25, etc., as necessary.

[0016] (Operation of tilt regulation portion 20) The tilt regulating part 20 stops the backrest 1 from tilting at a predetermined tilt angle, and the angle between the back mounting bracket 4 and the seat mounting bracket 5 is fixed according to the predetermined tilt angle. Even if the seat cylinder 10 is extended in this fixed state, it will not work due to the relationship between the parallel link mechanism and the backrest link mechanism. However, in the beauty salon chair according to this embodiment, the seat mounting bracket 5 is provided so as to be slidable back and forth along the slide bar 12 relative to the upper frame 9 as described above. Therefore, if the seat cylinder 10 is further extended to further increase the tilt angle of the first link 7, the seat mounting bracket 5 moves forward against the bias of the gas cylinder 13, and the distance between the node c and the node j is shortened. In this way, the length of the link between the node c and the node j of the backrest link mechanism is shortened, and the backrest link mechanism can be operated. In this way, the parallel link mechanism operates to raise and lower the upper frame 9 from the standard position in Fig. 3(A), but the length of the link between joint c and joint j of the backrest link mechanism becomes shorter, and the seat mounting bracket 5 and the seat 2 move forward relative to the upper frame 9 while the angle of the back mounting bracket 4 relative to the seat mounting bracket 5 (in other words, the angle of the backrest 1 relative to the seat 2) remains constant. This makes it possible to raise (and lower) the seat 2 and the backrest 1 while keeping the front-to-back positions of the backrest 1 and the seat 2 relative to the shampoo bowl approximately constant. The range in which this adjustment is possible depends on the length of the slide bar 12 (the length over which the seat mounting bracket 5 can move forward and backward relative to the upper frame 9), so the range in which adjustment is possible can be changed by changing this.

[0017] (Embodiments and Summary of the Invention) The present invention should not be understood as being limited to the above-described embodiment, and can be modified and implemented within the scope of the invention without departing from its gist. In the above embodiment, the angle is regulated by abutting the backrest 1 with the inclination regulating portion 20, but the angle of the backrest mounting bracket 4 relative to the seat mounting bracket 5 can also be regulated to a predetermined angle. In the above example, the parallel link mechanism and the backrest link mechanism are directly linked to each other by the first link 7, but the parallel link mechanism and the backrest link mechanism may be independent link mechanisms, and the force of the seat cylinder 10, which is the driving source, may be transmitted to the backrest link mechanism via the parallel link mechanism and the connecting link to indirectly link the two. In addition to the four-bar link mechanism, other link mechanisms such as a five-bar link mechanism (link mechanisms with an open loop structure or a closed loop structure) may be used. Each link constituting the link mechanism may be a rod-shaped member like the first link 7, but is not limited to this, and the name and specific shape of the member are not important, and the link mechanism may be composed of multiple members. [Explanation of symbols]

[0018] 1 Backrest 2 Seat 3. Keriita 4 Back mounting bracket 5 Seat mounting bracket 6 Tilt link 7 First link 8 Second Link 9 Upper Frame 10 Seat Cylinder 11 Base frame 12 Slide bar 13 Gas Cylinder 14 Keriita Link 15 Knee Pad Arm 20 Tilt control section 21 Female thread 22 Male thread 23 Contact part 25 Connecting members a Node a b Node b c Node c d Node d e Node e f Node f g Node g h Node h i Node i j Node j k Node k

Claims

1. The seat includes a fixed part that is installed on a floor, a seat that moves up and down and forward and backward relative to the fixed part, and a backrest that is connected to the rear side of the seat and can be raised and lowered. The seat is arranged to be slidable in a front-rear direction relative to an upper frame that moves up and back relative to the fixed portion and moves down and forward relative to the fixed portion, In the hairdressing chair, the backrest is configured to recline as the seat rises and retreats, and to rise as the seat descends and advances, a tilt restriction unit that prevents the backrest from tilting below a predetermined tilt angle when the backrest reaches a predetermined tilt angle with respect to the seat, even if the seat is raised; This hairdressing chair is characterized in that, when the position of the seat is further raised after the backrest has reached the set inclination angle, the seat is slid forward relative to the upper frame, so that the set inclination angle of the backrest does not change and the seat is raised without moving backward.

2. The seat includes a fixed part that is installed on a floor, a seat that moves up and down and forward and backward relative to the fixed part, and a backrest that is connected to the rear side of the seat and can be raised and lowered. The seat is raised and retreated relative to the fixed part by a parallel link mechanism, and is lowered and advanced relative to the fixed part. In the hairdressing chair, the backrest is configured to be tilted as the seat moves up and backward and to be raised as the seat moves down and forward by a backrest link mechanism interlocked with the parallel link mechanism, a tilt restriction unit that prevents the backrest from tilting below a predetermined tilt angle when the backrest reaches a predetermined tilt angle with respect to the seat, even if the seat is raised; The seat is connected to the parallel link mechanism so as to be slidable in the front-rear direction, A hairdressing chair characterized in that, when the seat is raised by the parallel link mechanism beyond a position where the backrest has reached a predetermined set inclination angle relative to the seat, the seat is configured to slide forward relative to the parallel link mechanism.

3. the parallel link mechanism includes a base frame, an upper frame, and a first link and a second link disposed between the base frame and the upper frame; 3. The hairdressing chair according to claim 2, wherein the seat is connected to the upper frame so as to be slidable in the front-rear direction, and is biased rearward by a biasing means.

4. The hairdressing chair according to claim 3, characterized in that the backrest link mechanism is a link mechanism having a closed loop structure, and is configured so that the length of each link constituting the backrest link mechanism is reduced by sliding the seat in the forward / backward direction relative to the upper frame.

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