floor chair

Abstract

To provide a legless chair in which a seat surface body slides in a curved manner with respect to a base.SOLUTION: A legless chair comprises a seat surface body 1, and a base 2 installed on an installation surface F. A curved surface 1c is formed on a surface of the seat surface body 1 opposed to the base 2. A curve slide mechanism 3 for sliding the seat surface body 1 along the curved surface 1c with respect to the base 2 is provided between the curved surface 1c and the base 2. The legless chair may comprise operation means 4 for adding power to the curve slide mechanism 3, and be provided with a ratchet wrench mechanism 5 between the operation means 4 and the curve slide mechanism 3.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a seat chair, and more particularly to a seat chair in which a seat body slides relative to a base. [Background technology]

[0002] Conventionally, there have been disclosed chairs in which the seat body slides linearly back and forth relative to the base (for example, Patent Documents 1, 2, and 3). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-153345 [Patent Document 2] Japanese Patent Application Laid-Open No. 2003-289976 [Patent Document 3] Japanese Utility Model Application Publication No. 3-92154 Summary of the Invention [Problem to be solved by the invention]

[0004] In contrast to the above-mentioned conventional examples, an object of the present invention is to provide a chair in which the seat body slides in a curved manner relative to the base. [Means for solving the problem]

[0005] To solve this problem, the present invention provides a chair that includes a seat body and a base that is placed on a surface where the seat body slides relative to the base, with a curved surface formed on the surface of the seat body facing the base, and a curved sliding mechanism that slides the seat body along the curved surface relative to the base, provided between the curved surface and the base.

[0006] The present invention may also be configured to include an operating means for applying power to the curved slide mechanism, and a ratchet wrench mechanism provided between the operating means and the curved slide mechanism. In this application, the term "ratchet wrench mechanism" refers to a mechanism, like a ratchet wrench, that transmits rotational force to a rotation axis at the center of rotation when rotated in one direction, but does not transmit rotational force to the rotation axis at the center of rotation when rotated in the opposite direction. [Effects of the Invention]

[0007] According to the present invention, a chair can be provided in which the seat body slides in a curved manner relative to the base. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram showing an embodiment of the present invention. [Figure 2] FIG. 2 is a schematic diagram of the curved slide mechanism and its surroundings shown in FIG. [Figure 3] FIG. 3 is an explanatory diagram of the operation of the chair shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] An embodiment of the present invention will be described below with reference to the drawings. The legless chair shown in Fig. 1 comprises a seat portion 1a, a backrest portion 1b, and a base 2 placed on a mounting surface F, with the seat portion 1a and backrest portion 1b sliding relative to the base 2. The seat portion 1a and backrest portion 1b are integrally formed as a seat body 1. The surface of the seat body 1 facing the base 2 is formed with a curved surface 1c that is approximately arc-shaped. Furthermore, a curved slide mechanism 3 is provided between the curved surface 1c of the seat body 1 and the base 2, which slides the seat body 1 along the curved surface 1c relative to the base 2.

[0010] The legless chair of FIG. 1 is also provided with a handle 4 (operating means) for applying power to the curved slide mechanism 3, and a ratchet wrench mechanism 5 is provided between the handle 4 and the curved slide mechanism 3.

[0011] To elaborate further, in this embodiment, the seat portion 1a and backrest portion 1b are equipped with cushions on the surfaces that come into contact with the seated person. The seat body 1 is an integrated design with no joints between the seat portion 1a and backrest portion 1b. The base 2 is approximately 20 cm high.

[0012] As the curved slide mechanism 3, for example, a slide rail device disclosed in Japanese Patent Application Laid-Open No. 2003-307216 can be used. Japanese Patent Application Laid-Open No. 2003-307216 contains the following description. "

[0006] In the slide rail device, either the first rail or the second rail is fixed to the frame, and a gear driven by an electric motor provided on the fixed rail (fixed side rail) engages with a tooth-like protrusion formed on the other rail, causing the other unfixed rail to function as a slide rail and move smoothly along the guide groove via a sphere." "

[0023] ...The first rail 2 and the second rail 3 have been described as being straight, linear rails. However, as shown in FIG. 9, the slide rail device 1' may be configured with a first rail 2' and a second rail 3' that are curved in an arc, and the second rail 3' may be moved back and forth by the forward and reverse rotation of the motor 5." In this case, a second rail consisting of an arc-shaped curved rail disclosed in Figure 9 of the publication may be fixed to the curved surface 1c of the seat body 1, and the first rail and a drive unit including gears may be fixed to the base 2. Depending on the load applied to the seat body 1, multiple slide rail devices may be installed in parallel.

[0013] In describing the handle 4 and the ratchet wrench mechanism 5, reference will be made to the structure of the ratchet wrench disclosed in, for example, Japanese Utility Model Laid-Open Publication No. 6-71065. The following is stated in Japanese Utility Model Application Laid-Open Publication No. 6-71065. "

[0002] A ratchet wrench such as the one shown in Figure 8 has been widely known. This ratchet wrench comprises a long wrench body a having an operating grip a2 at the rear side, and an engagement part b rotatably attached to the tip of the wrench body a for engaging with a bolt or the like. The engagement part b is provided with a toothed part b1 consisting of multiple teeth, and the wrench body a is provided with a ratchet pawl a1 that engages with the toothed part b1. By rotating the operating grip a2 of the wrench body a in the forward direction, the toothed part b1 of the engagement part b and the ratchet pawl a1 engage, and the engagement part b rotates in the forward direction along with the wrench body a. Meanwhile, by rotating the operating grip a2 of the wrench body a in the reverse direction, the ratchet pawl a1 slides over the toothed part b1 of the engagement part b, and only the wrench body a rotates. In this way, by repeatedly rotating the wrench body a in the forward and reverse directions, the engagement part b, which engages with a bolt or the like, can be rotated in the forward direction only without rotating in the reverse direction." The operating grip of the ratchet wrench disclosed in the publication corresponds to the handle 4. The main body of the ratchet wrench disclosed in the publication corresponds to the ratchet wrench mechanism 5.

[0014] In this publication, the operating grip rotates around the main body. Rotation in one direction transmits a rotational force to the main body, but rotation in the opposite direction causes the operating grip to rotate freely. When the switching operation piece is switched, the rotation direction of the operating grip that transmits the rotational force is reversed.

[0015] Similarly in this embodiment, the handle 4 rotates around the ratchet wrench mechanism 5. Rotation of the handle 4 in one direction transmits a rotational force to the ratchet wrench mechanism 5, but rotation in the opposite direction causes the handle 4 to spin freely. Switching the switching operation piece built into the ratchet wrench mechanism 5 reverses the rotation direction of the handle 4 that transmits the rotational force.

[0016] With the above in mind, the power system of this embodiment will be described with reference to Figure 2. Figure 2 shows the layout of the seat chair as viewed from the front. A ratchet wrench mechanism 5 is mounted at the rotation center located at the lower end of the handle 4. A rotating shaft 6 is connected to the ratchet wrench mechanism 5, and the rotating shaft 6 transmits rotational force to a gear built into the curved slide mechanism 3 via a gearbox 7. As mentioned above, the curved slide mechanism 3 is disposed between the seat body 1 and the base 2, and the rotation of the built-in gear causes the seat body 1 to slide in a curved manner along the curved surface portion 1c relative to the base 2. The upper end of the handle 4 is located within reach of a person sitting on the seat body 1.

[0017] As shown in Figure 1, when a person sits on seat body 1 and moves handle 4 back and forth, the forward rotation of handle 4 rotates rotating shaft 6 via ratchet wrench mechanism 5. This rotation is transmitted to curved slide mechanism 3 via gearbox 7, causing seat body 1 to slide in one direction relative to base 2. When handle 4 rotates in the backward direction, ratchet wrench mechanism 5 rotates freely, during which time seat body 1 does not slide and handle 4 returns to its original position. The reciprocating movement of handle 4 causes seat body 1 to slide in one direction relative to base 2. As a result, for example, the angle of seat body 1 changes relative to the position of base 2, as shown in Figure 3. By switching the switching operation piece built into ratchet wrench mechanism 5 and reciprocating handle 4 back and forth again, seat body 1 slides in the opposite direction relative to base 2, and the angle of seat body 1 returns from Figure 3 to the state shown in Figure 1.

[0018] As described above, this embodiment can provide a legless chair in which the seat body 1 slides in a curved line relative to the base 2. Furthermore, the user of the legless chair can manually adjust the amount of sliding of the seat body 1 while sitting on it.

[0019] Here, the scope of the present invention is not limited to the above-described embodiments, but is within the scope of the claims. The shape of the curved surface is not limited to an arc shape, but may be elliptical, etc. The operating means is not limited to a handle operated by hand, but may be a pedal operated by foot, etc. The switching operation piece of the ratchet wrench mechanism may be connected to an operating rod or the like so that it can be switched from the user's hand. The power source of the curved slide mechanism may be an electric means such as a motor. The location where the ratchet wrench mechanism is installed is not limited to the lower end of the handle, but may be between the rotating shaft and the gearbox, inside the gearbox, between the gearbox and the curved slide mechanism, or inside the curved slide mechanism. [Explanation of symbols]

[0020] 1 seat body 1a Seat part 1b Backrest 1c curved surface 2 pedestal 3 Curved slide mechanism 4. Handle (operation means) 5 Ratchet wrench mechanism 6 Rotation Axis 7. Gearbox

Claims

[Claim 1] A chair comprising a seat body and a base that is installed on a surface, and the seat body slides relative to the base, A curved surface is formed on the surface of the seat body facing the base, a curved slide mechanism is provided between the curved surface and the base, which slides the seat body along the curved surface relative to the base; A ratchet wrench mechanism; an operating means that rotates around the ratchet wrench mechanism, transmitting a rotational force to the ratchet wrench mechanism when rotated in one direction, but causing the ratchet wrench mechanism to rotate freely when rotated in the opposite direction; a rotation shaft connected to the ratchet wrench mechanism and rotated by receiving the rotational force due to the rotation in one direction; a gear box that transmits the rotational force of the rotation shaft to the curved slide mechanism, The curved slide mechanism receives the rotational force transmitted from the gear box through a built-in gear, and the rotation of the gear causes the seat body to slide along the curved surface relative to the base. Chair.

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