JP2010125024A - Chair type massage machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chair type massage machine which carries out reclining of a backrest section and a seat section with one motor and neither impairs assembling property nor generates shocks or crashing sounds while reclining. <P>SOLUTION: A reclining mechanism includes an electric actuator 70 and a link mechanism 4. One end of the electric actuator is pivoted with respect to a base frame 1 by a pivot shaft 71 and the other end is pivotally connected 72 to the backrest section. In order to prevent the pivot shaft 71 from moving and rattling during operation of the electric actuator within gaps K1 and K2 formed respectively by a shaft hole 72 on the electric actuator side and a shaft hole 73 on the base frame side, one end of the electric actuator is pressed by the distal ends of screws 75 so as to abut the pivot shaft 71 on one end side of the shaft hole 72. By doing so, movements of the pivot shaft 71 is prevented. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a chair-type massage machine that can recline a backrest portion and a seat portion, and specifically, a backrest while maintaining a relaxed posture of a user by a single drive source. It is related with the chair type massage machine which can perform a reclining of a seat and a seat.

There is known a chair type massage machine that can recline a backrest and a seat provided with massage means. For example, Patent Document 1 has a reclining mechanism including independent drive sources for the backrest and the seat, and the backrest and the seat can be reclined independently.
JP, 2003-289975, A If the independent drive source is arranged in a backrest part and a seat part, respectively, a reclining mechanism will be enlarged and complicated, and in connection with this, a chair type massage machine will be enlarged and complicated, such as control. Invite. In the case of a reclining mechanism having a plurality of driving sources, it is difficult to reach the target angle in synchronism between the backrest and the seat due to variations in each driving source, differences in load applied to the driving source, etc. After one has reached the target angle, there may be an unnatural movement such that the other reaches the target angle with a delay.

  Therefore, the applicant has already proposed an improved massage machine in which the backrest and the seat can be reclined by a single drive source. 1 to 3 show this improved chair type massage machine. The structure will be described below. 1 to 3 also show a basic structure of the massage machine according to the first embodiment of the present invention.

  As shown in FIG. 1, the chair type massage machine has a rear part of a seat part 2 on which a user sits and a backrest part 3 around a fulcrum 11 placed on the floor surface and located at a high position on the base frame 1. The bracket 31 projecting from the lower part is pivotally supported, and the seat part 2 and the backrest part 3 are interlocked by the link mechanism 4 disposed below the seat part 2 so that reclining is possible. The seat portion 2 and the backrest portion 3 are configured by exteriorly mounting a cushion material, a cover, and the like (not shown), and each include a known massage means (not shown).

  As shown in FIG. 1, the link mechanism 4 is composed of a vertically long, roughly rhombus cam body 5 that is pivotally supported by a pivot 50 at a fixed position at the center of the base frame 1, and a link piece 6. One end of the link piece 6 is pivotally connected to the lower end of the backrest 3 by a pivot 61, and the other end is pivotally connected to the cam body 5 by a pivot 62.

  A cam surface 53 is formed at the upper end portion of the cam body 5, and the roller 8 pivotally supported on the lower end of the bracket 21 protruding from the lower surface of the seat portion 2 rolls on the cam surface 53. The cam surface 53 has a crest 53c at the center and troughs 53a and 53b at both ends, and slopes are formed from the crest 53c to both troughs 53a and 53b.

  The drive source 7 for operating the link mechanism 4 is an electric actuator 70 whose overall length expands and contracts by motor driving. One end of the actuator 70 protrudes from the base frame 1 to a height approaching the front portion of the seat portion 2. The upper end of the bracket 13 is pivotally connected by a pivot 71, and the other end is pivotally connected by a pivot 72 to the lower end of the backrest 3. When the full length of the actuator 70 is shortened, the backrest portion 3 tilts backward around the fulcrum 11, and when the full length of the actuator 70 is extended, the backrest portion 3 stands. In addition, the part which supports the pivot 71 of the bracket 13 has the two bracket pieces 13a and 13a so that the pivot 71 may be pinched | interposed from both sides (refer FIG. 5, FIG. 6).

  When the electric actuator 70 is contracted from the state in which the backrest portion 3 is most upright as shown in FIG. 1 (this state is the upright state as defined in claim 1), the backrest portion 3 tilts backward, The lower end of the backrest 3 below the fulcrum 11 moves forward, and the cam body 5 is rotated forward about the pivot 50 via the link piece 6. When the cam body 5 rotates, the roller 8 rolls on the slope of the cam surface 53 from the valley portion 53a to the peak portion 53c, and rotates the seat portion 2 around the fulcrum 11 so that the front end thereof is raised.

  When the backrest portion 3 continues to tilt backward and the roller 8 comes to the position of the central mountain portion 53c of the cam surface 53 as shown in FIG. 2, the front end of the seat portion 2 is in the highest lifted state. (This state is an intermediate state as defined in claim 1).

  When the electric actuator 70 is further contracted and the backrest 3 continues to tilt backward, the roller 8 rolls on the slope of the cam surface 53 from the peak 53c to the valley 53b, and the front end of the seat 2 is lowered. Thus, the fulcrum 11 is rotated around the center. FIG. 3 shows a state in which the backrest portion 3 is tilted most backward (this state is a tilted state referred to in claim 1).

  When the electric actuator 70 is extended from the state shown in FIG. 3, the backrest 3 rises and returns to the original standing state (FIG. 1) through the intermediate state shown in FIG.

  As described above, according to the improved chair type massage machine, the reclining mechanism can be driven with one drive source, so that the reclining mechanism does not become large and complicated, and stable reclining operation without variation. Can be performed. When the backrest swings from the standing state to the intermediate state, the seat front end rises, and when the backrest moves from the intermediate state to the tilted state, the raised seat front end is lowered. Therefore, the reclining portion and the seat portion can be reclined while the user is relaxed.

  In the improved chair-type massage machine described above, the roller as shown in FIG. 1 at the position where the front end of the seat portion 2 is raised most (the roller 8 is located at the crest 53c of the cam surface 53 as shown in FIG. 2). The direction of the load applied to the electric actuator 70 is reversed between the case where 8 is between the crest 53c and the trough 53a and the case where the roller 8 is between the crest 53c and the trough 53b as shown in FIG. .

  That is, when the roller 8 is between the peak portion 53c and the valley portion 53a as shown in FIG. 1, the actuator 70 is pulled in the pulling direction (arrow A direction) as shown in FIG. 4 due to the weight of the human body applied to the seat portion 2. When the roller 8 is between the crest 53c and the trough 53b, a force in the compression direction (arrow B direction) acts on the actuator 70 as shown in FIG.

  One end of the actuator 70 is pivotally connected to the upper portion of the bracket 13 of the base frame by a pivot 71. A pivot 71, a shaft hole 72 through which the pivot 71 is formed in the actuator 70, and a pivot 71 formed in the bracket 13 are provided. As shown in FIGS. 5 and 6, gaps K1 and K2 are provided between the shaft hole 73 and the shaft hole 73, respectively.

  When the roller 8 passes through the crest portion 53c of the cam surface 53 and moves to the opposite slope by the gaps K1 and K2, the direction of the force applied to the actuator 70 is reversed, so that the actuator 70 and the pivot 71 are instantaneously moved. In the gaps K1 and K2, the actuator moves in the direction of operation of the actuator and, for example, instantaneously changes from the state of FIG. 5 to the state of FIG. 7 or from the state of FIG. 7 to the state of FIG. As a result, the movement of the seat 2 and the backrest 3 during reclining is not smooth and rattling occurs, and the impact of “kick” is transmitted to the user and the impact sound of “katch” is generated. There is.

  The gaps K1 and K2 may be as close to zero as possible. However, if the gap is close to zero, there is a problem that the assemblability is impaired.

  An object of the present invention is to enable reclining of a backrest and a seat by a single drive source, and does not impair assemblability and does not cause an impact or impact sound during reclining. A type massage machine is to be provided.

In order to solve the above problems, the chair type massage machine of the present invention is
In a chair type massage machine comprising a backrest portion on which a user's back hits, a seat portion on which the user sits, and a reclining mechanism that swings the backrest portion and the seat portion,
The reclining mechanism has one electric actuator and a link mechanism,
The electric actuator is pivotally supported at one end with respect to the base frame and pivotally connected at the other end to the backrest.
When the backrest swings from the standing state to the intermediate state when the backrest swings from the standing state to the tilted state through the intermediate state by operating the electric actuator, Tilt so that the front end of the seat rises, and when the backrest moves from the intermediate state to the tilted state, it is tilted to lower the front end of the raised seat,
The pivot on one end side of the electric actuator has a gap formed by the pivot, a shaft hole provided on the electric actuator side through which the pivot passes, and a shaft hole provided on the base frame side during the operation of the electric actuator. It is provided with a rattling prevention mechanism that prevents its movement so as not to move.

  Examples of the rattling prevention mechanism include a mechanism including a screw that pushes one end of the electric actuator so that the pivot shaft comes into contact with one end side of a shaft hole formed on the electric actuator side.

  According to the present invention, the pivot on one end side of the electric actuator is prevented from moving in the gap formed between the shaft hole during the operation of the electric actuator by the rattling prevention mechanism. Therefore, during the reclining of the backrest and the seat, no impact or impact sound is generated, and a smooth reclining operation can be obtained. Further, since it is not necessary to narrow the gap formed between the pivot and each shaft hole, the assemblability is not impaired.

  Further, as a rattling prevention mechanism, it is sufficient to adopt a configuration in which one end of the electric actuator is pushed with a screw so that the pivot is in contact with one end side of a shaft hole formed on the electric actuator side.

  Since the configuration of the chair-type massage machine according to the first embodiment of the present invention is the same as that shown in FIGS. 1 to 3 as an improved chair-type massage machine except for the configuration near the one end side pivot 71 of the electric actuator, Here, only the configuration in the vicinity of the one end side pivot 71 of the electric actuator will be described with reference to FIGS.

  The bracket 13 includes a pair of left and right bracket pieces 13a and 13a. The pivot 71 passes through both bracket pieces 13a and 13a and the actuator 70 so as not to fall off. The tips of both bracket pieces 13a, 13a are connected and integrated by a connecting member 13b. A screw 75 is screwed into the connecting member 13b from the outside toward the one end 70a of the actuator 70. At the tip of the screw 75, one end of the actuator 70 is connected in the direction of arrow C in FIG. As a result, the pivot shaft 71 is fixed in contact with one end side of the shaft hole 72 formed in the actuator 70. Accordingly, the actuator 70 is pulled. Regardless of the direction of force or the direction of compression, the pivot 71 does not move in the shaft hole K1 (strictly, the actuator 70 does not move) and is fixed in the shaft hole K1. Since it does not move, it does not move even in the shaft hole K2.

  Therefore, even if the roller 8 passes through the peak portion 53c of the cam surface 53 and moves to the opposite slope during the reclining of the seat portion 2 or the backrest portion 3, the direction of the force applied to the actuator 70 is reversed. The actuator 70 and the pivot shaft 71 do not move instantaneously in the gaps K1 and K2 in the operation direction of the actuator, and no rattling occurs. Therefore, the user does not receive a “kock” impact or a “katch” impact sound, and can perform a smooth reclining operation.

  In the embodiment, two screws 75 for preventing rattling are used so that the actuator 70 can be pushed evenly in a balanced manner along the operation direction. However, when only one screw 75 is used, the actuator 70 The screw 75 may be positioned on the position where the 70 can be pushed in a balanced manner along the operation direction, that is, on the central axis in the operation direction.

  In the chair type massage machine of the above embodiment, the cam body 5 and the link piece 6 are configured as the link mechanism 4 that links the backrest portion 3 and the seat portion 2, but instead of using the cam body 5, FIG. As in the second embodiment shown in FIGS. 10 to 12, all may be constituted by link pieces.

  Hereinafter, the chair type massage machine 10 of Embodiment 2 is demonstrated based on FIG. 10 thru | or FIG. As shown in FIG. 10, the chair type massage machine 10 includes a base frame 12 placed on the floor surface, and a seat part 30 on which a user sits and a backrest part 20 against which the back hits a shaft 90. It can be swung by a reclining mechanism 40 described later.

  The backrest 20 is configured by mounting a cushion 23 and the like on the outer periphery of the backrest frame 22, and a massage means 24 for massaging the shoulder, back, waist, etc. of the user is lifted and lowered by the lifting unit 25. Deployed as possible.

  The seat portion 30 is configured by mounting a cushion 33 or the like on the outer periphery of the seat portion frame 32, and a massage means (not shown) such as an airbag is provided therein as needed. At the tip of the seat portion 30, there is a leg portion 38 on which the user's leg is placed.

  The reclining mechanism 40 includes an electric actuator 42 and a link mechanism 52 that are driving sources. One end of the electric actuator 42 is pivotally connected to the upper end of a bracket 51 that is integrally erected from the approximate center of the base frame 12 upward and upward, and the other end is connected to the backrest 20. It is pivotally connected to the lower end. In the chair type massage machine 10, when the actuator 42 is contracted, the backrest 20 is pulled forward with the shaft support 90 as a fulcrum, and the backrest 20 tilts backward as shown in FIGS. 11 and 12. To do.

  The link mechanism 52 can be configured by combining a plurality of link pieces 55, 56, 57. In FIG. 10, the link mechanism 52 includes a first link piece 56 pivotally supported by a pivot 91 at a substantially center of the base frame 12, a position near the free end of the first link piece 56, and a lower end of the backrest 20. The second link piece 55, which is pivotally supported by the pivots 92, 93, and the first link piece 56 and the bracket 35 projecting from the lower end of the seat portion 30 are pivoted by the pivots 94, 95. The third link piece 57 is supported and connected to each other.

  In the present embodiment, the height of the seat 30 is substantially the same in the standing state of FIG. 10 and the tilted state of FIG. Therefore, the first link piece 56 and the third link piece 57 move so as to be symmetrical in FIGS. 10 and 12. In order to make this movement, the stroke of the second link piece 55 linked to the backrest 20 is determined.

  In the reclining mechanism 40 configured as described above, when the electric actuator 42 is operated and the backrest 20 starts to tilt backward from the standing state of FIG. 1, the second link piece 55 is pushed forward, and the first link piece 56 is The third link piece 57 is pushed forward by tilting forward around a pivot point 91 with the base frame 12. As a result, the seat portion 30 swings around the shaft support portion 90 so that the front end rises.

  As shown in FIG. 11, when the backrest 20 tilts backward from the standing state to the intermediate state, the link mechanism 52 causes the first link piece 56 and the third link piece 57 to be in a straight line state, and the front end of the seat portion 30 rises. Maximum.

  When the electric actuator 42 is further operated, the backrest portion 20 tilts backward from the intermediate state of FIG. 11, the second link piece 55 is pushed forward, and the first link piece 56 has a pivot point 91 with the base plate 12. Tilt further forward in the center. As a result, the third link piece 57 tilts backward and pulls in the direction of lowering the front end of the seat 30 that has been raised, and as shown in FIG. 12, the backrest 20 and the seat 30 are substantially flat. Transition.

  By actuating the electric actuator 42 in the reverse direction, that is, by extending the actuator 42, the backrest 20 and the seat 30 perform operations opposite to those described above.

  Even in such a massage machine having the link mechanism 52, the force applied to the actuator 42 is reversed at the position where the front end of the seat portion 30 is the highest, and the pivot 71 similar to that described with reference to FIGS. Since rattling occurs, rattling of the pivot 71 can be prevented using the same rattling prevention mechanism as described in FIGS.

In the conventional form and the basic form of the chair type massage machine of Embodiment 1 of the present invention, the standing state is shown. The intermediate state of the chair type massage machine is shown. The back tilt state of the chair type massage machine is shown. It is a side view which shows the conventional electric actuator one end part vicinity in the state of FIG. It is sectional drawing based on the XX line in FIG. 4, and shows the relationship between a pivot and a shaft hole. It is a side view which shows the conventional electric actuator one end part vicinity in the state of FIG. It is sectional drawing based on the YY line in FIG. 6, and shows the relationship between a pivot and a shaft hole. It is a perspective view which shows the electric actuator one end part vicinity of this invention. It is a side view which shows the electric actuator one end part vicinity of this invention. The basic form of the chair type massage machine of Embodiment 2 of this invention has shown the standing state. The intermediate state of the chair type massage machine is shown. The back tilt state of the chair type massage machine is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Backrest part 2 Seat part 70 Electric actuator 4 Link mechanism 1 Base frame 71 Axis 72 Axis hole 73 Axis hole 75 Screw (rattle prevention mechanism)
6 Link piece 5 Cam body 53 Cam surface 20 Backrest 30 Seat 40 Reclining mechanism 42 Electric actuator 52 Link mechanism
12 Base frame 56 First link piece 55 Second link piece 57 Third link piece

Claims (3)

In a chair type massage machine comprising a backrest portion on which a user's back hits, a seat portion on which the user sits, and a reclining mechanism that swings the backrest portion and the seat portion,
The reclining mechanism has one electric actuator and a link mechanism,
The electric actuator is pivotally supported at one end with respect to the base frame and pivotally connected at the other end to the backrest.
When the backrest swings from the standing state to the intermediate state when the backrest swings from the standing state to the tilted state through the intermediate state by operating the electric actuator, Tilt so that the front end of the seat rises, and when the backrest moves from the intermediate state to the tilted state, it is tilted to lower the front end of the raised seat,
The pivot on one end side of the electric actuator has a gap formed by the pivot, a shaft hole provided on the electric actuator side through which the pivot passes, and a shaft hole provided on the base frame side during the operation of the electric actuator. A chair type massage machine characterized by having a rattling prevention mechanism that prevents its movement so that it does not move. The link mechanism includes a link piece and a cam body pivotally supported by the base frame,
One end of the link piece is pivotally supported by the backrest, and the other end is pivotally supported by the cam body,
The cam body has a cam surface that comes into contact with the seat on a part of the cam body,
The cam surface is backrested when the backrest is swung from the standing state to the tilted state through the intermediate state by rotating the cam body via the link piece by operating the electric actuator. When the seat swings from the standing state to the intermediate state, tilt the seat front end to rise, and when the backrest moves from the middle state to the tilted state, lower the raised seat front end. The chair type massage machine according to claim 1, wherein the chair type massage machine is tilted.   The chair-type massage according to claim 1 or 2, wherein the rattling prevention mechanism includes a screw that pushes one end of the electric actuator so that the pivot shaft comes into contact with one end side of a shaft hole formed on the electric actuator side. Machine.

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