JP2009082421A

JP2009082421A - Massaging machine

Info

Publication number: JP2009082421A
Application number: JP2007255851A
Authority: JP
Inventors: Junji Nakamura; 潤二中村; Masatoshi Owa; 昌俊大輪; Sousei Ikebe; 宗清池部; Yosuke Kurata; 陽介倉田
Original assignee: Panasonic Electric Works Co Ltd
Current assignee: Panasonic Electric Works Co Ltd
Priority date: 2007-09-28
Filing date: 2007-09-28
Publication date: 2009-04-23
Anticipated expiration: 2027-09-28
Also published as: JP5134330B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a massaging machine capable of providing sharp back-stretching massage by a simple structure. <P>SOLUTION: A mechanism block 4 disposed inside a backrest part has a treatment arm 7 to which roller type treatment elements 8 are rotatably journaled. Each treatment element 8 is rotatably journaled to the treatment arm 7 with the rotation center 8d eccentric to the outer surface 8c. The massaging machine performs the eccentric rotation in such a way that the quantity of forward projection A varies while the treatment elements 8 are pressed on the lining of the backrest part according to the upward/downward movement of the mechanism block 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、背もたれ部の内部に左右一対のローラー状の施療子を前後方向に進退移動するように配置したマッサージ機に関するものである。 The present invention relates to a massage machine in which a pair of left and right roller-shaped treatment elements are disposed in a backrest portion so as to advance and retreat in the front-rear direction.

従来から、マッサージ動作中に施療子の進退駆動部を駆動して、施療子の駆動ユニット全体を進退移動させることによって背筋のばしマッサージのような変化に富んだマッサージ駆動を行なうことができるマッサージ機が知られている（例えば、特許文献１参照）。 Conventionally, there has been a massage machine capable of performing a variety of massage driving such as spine stretching massage by driving the advance / retreat drive part of the treatment element during the massage operation and moving the entire drive unit of the treatment element forward / backward. It is known (see, for example, Patent Document 1).

ところがこの特許文献１に見られる従来例では、施療子による叩き動作、揉み動作、上下動作に加えて、施療子の駆動ユニット全体を前後方向に進退駆動させるための進退駆動機構を別途設ける必要があり、このためマッサージ機の機構部が複雑かつ大型化してしまうという問題があった。 However, in the conventional example shown in Patent Document 1, it is necessary to separately provide an advancing / retreating drive mechanism for advancing / retreating the entire drive unit of the treatment element in the front-rear direction in addition to the hitting operation, the squeezing operation, and the vertical movement by the treatment element. For this reason, there has been a problem that the mechanism of the massage machine is complicated and large.

また他の従来例として、施療子を駆動用モータにより駆動回転することにより施療子の施療者の背中側への突出量が可変とされているマッサージ機が知られている（例えば、特許文献２参照）。 As another conventional example, there is known a massage machine in which the amount of protrusion of the treatment element to the back side of the user is variable by driving and rotating the treatment element with a driving motor (for example, Patent Document 2). reference).

ところがこの特許文献２に見られる従来例では、施療子を駆動用モータによって前後方向に進退駆動させるものであり、施療として揉み動作と上下動作に限定されてしまい、叩き動作ができないという課題を有していた。 However, in the conventional example shown in Patent Document 2, the treatment element is driven to move back and forth in the front-rear direction by a driving motor, and the treatment is limited to the squeezing operation and the up-and-down operation, and there is a problem that the tapping operation cannot be performed. Was.

このように従来では、叩き動作、揉み動作、上下動作に加えて、背筋のばしマッサージを可能にする施療子の前後方向への進退動作を簡易な構造で実現するものは存在しなかった。
特開２００２−３６９８４９号公報特開平８−２５７０８６号公報 Thus, in the past, there has been no one that realizes a back-and-forth movement of the treatment element that enables back massage of the back muscles with a simple structure, in addition to the hitting operation, the kneading operation, and the up-and-down operation.
JP 2002-369849 A JP-A-8-257086

本発明は上記の従来の問題点に鑑みて発明したものであって、簡易な構造でメリハリのある背筋のばしマッサージが可能なマッサージ機を提供することを課題とするものである。 The present invention has been invented in view of the above-described conventional problems, and an object of the present invention is to provide a massage machine capable of performing a straight back massage with a simple structure.

前記課題を解決するために本発明は、施療者が座る座部２と、座部２の後端部に背もたれ部３を略上方に向けて設け、背もたれ部３の内部に、左右一対のローラー状の施療子８を備えた機構ブロック４を上下移動可能に収納したマッサージ機であって、上記機構ブロック４は上記施療子８を回転自在に軸支する施療アーム７を備えると共に、上記施療子８は外周面８ｃに対して回転中心８ｄを偏心して施療アーム７に回転自在に軸支されており、機構ブロック４の上下移動に伴って上記施療子８が背もたれ部３の裏布地部３ａに押し当てられながら前方Ａへの突出量が変化するような偏心回転を行なうように構成されていることを特徴としている。 In order to solve the above-described problems, the present invention provides a seat 2 on which a user sits, and a backrest 3 is provided substantially upward at the rear end of the seat 2, and a pair of left and right rollers are provided inside the backrest 3. A massage machine in which a mechanism block 4 having a shape-like treatment element 8 is accommodated so as to be vertically movable. The mechanism block 4 includes a treatment arm 7 that rotatably supports the treatment element 8, and the treatment element. 8 is pivotally supported on the treatment arm 7 with the center of rotation 8d being eccentric with respect to the outer peripheral surface 8c, and the treatment element 8 is attached to the back fabric portion 3a of the backrest portion 3 as the mechanism block 4 moves up and down. It is characterized in that it is configured to perform eccentric rotation such that the amount of protrusion to the front A changes while being pressed.

このような構成とすることで、機構ブロック４を上下移動させると、施療子８が背もたれ部３の裏布地部３ａを前方Ａに押しながら、偏心回転しながら上下方向Ｂに移動することにより上下動作に連動して前方Ａへの突出量が変化する。これにより、メリハリのある背筋のばしマッサージが可能となる。しかも、従来のような複雑な強弱機構等を用いたり、或いは駆動用モータで施療子８の前後への突出量を変化させたりする構造ではなく、施療子８を施療アーム７に対して回転中心８ｄを偏心して取り付けるという簡易な構造で済むようになる。 With this configuration, when the mechanism block 4 is moved up and down, the treatment element 8 moves in the up and down direction B while eccentrically rotating while pushing the backing fabric portion 3a of the backrest portion 3 toward the front A. The amount of protrusion to the front A changes in conjunction with the operation. As a result, it is possible to perform a straight back massage. Moreover, it is not a structure that uses a complicated dynamic mechanism or the like as in the prior art, or changes the amount of protrusion of the treatment element 8 forward and backward with a drive motor, but the treatment element 8 is centered on the treatment arm 7. A simple structure in which 8d is eccentrically mounted is sufficient.

また、上記施療アーム７は、上下一対の施療子８ａ,８ｂを個別に回転自在に軸支すると共に、少なくとも一方の施療子８ａ又は８ｂがその外周面８ｃに対して回転中心８ｄを偏心させて回転自在に軸支されていることを特徴とするのが好ましい。この場合、上下一対の施療子８ａ,８ｂの少なくとも一方の回転中心８ｄを偏心させることで、強弱の感じ方により一層の変化を加えることができ、より一層、メリハリのある背筋のばしマッサージ効果が得られるようになる。 The treatment arm 7 pivotally supports a pair of upper and lower treatment elements 8a and 8b individually, and at least one of the treatment elements 8a or 8b decenters the rotation center 8d with respect to the outer peripheral surface 8c. It is preferable that the shaft is rotatably supported. In this case, by decentering at least one rotation center 8d of the pair of upper and lower treatment elements 8a, 8b, it is possible to further change the feeling of strength and to obtain a more effective back massage effect. Be able to.

本発明は、施療子を施療アームに対して回転中心を偏心して取り付けることにより、施療子が背もたれ部の裏布地部を前方に押しながら上下移動する際に偏心回転して前方への突出量が変化するものであり、簡易な構造でメリハリのある背筋のばしマッサージが可能となる。 In the present invention, the treatment element is attached to the treatment arm with the center of rotation being eccentric, and the treatment element is eccentrically rotated when the treatment element moves up and down while pushing the back cloth part of the back part forward, so that the amount of protrusion to the front is increased. It changes, and it is possible to massage the back muscles with a simple structure and sharpness.

以下、本発明を添付図面に示す実施形態に基いて説明する。 Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

図３（ａ）は、本発明の一実施形態における椅子式のマッサージ機１を示し、同（ｂ）は機構ブロック４の斜視図を示している。 FIG. 3A shows a chair type massage machine 1 according to an embodiment of the present invention, and FIG. 3B shows a perspective view of the mechanism block 4.

本例のマッサージ機１は、座部２の後端部に背もたれ部３を略上方に向けて設け、背もたれ部３の内部に機械的施療動作を行なう機構ブロック４を上下移動自在に配置して構成してあり、施療者５は座部２に座ると共に背もたれ部３に背もたれした状態で、機構ブロック４に設けた左右一対の施療子ユニット６による叩き動作、揉み動作、背筋のばし動作等の機械的施療動作を行なうことが可能とされる。各施療子ユニット６は、側面視く字状に曲成された施療アーム７と、この施療アーム７の上下両先端にそれぞれ取り付けられた上下一対のローラー状の施療子８とを備えている。 The massage machine 1 of this example is provided with a backrest part 3 facing substantially upward at the rear end part of the seat part 2, and a mechanism block 4 for performing a mechanical treatment operation is arranged in the backrest part 3 so as to be movable up and down. The machine 5 is configured such that the user 5 sits on the seat portion 2 and is backrested on the backrest portion 3, and performs a tapping operation, a kneading operation, a spine stretching operation, etc. by a pair of left and right treatment element units 6 provided on the mechanism block 4. It is possible to perform an automatic treatment operation. Each treatment element unit 6 includes a treatment arm 7 which is bent in a side view and a pair of upper and lower roller-like treatment elements 8 attached to both upper and lower ends of the treatment arm 7.

上記機構ブロック４は、図１（ａ）、図３に示すように、左右一対のギアプレート９間に幅駆動軸１１、スライドガイド軸１２、叩き駆動軸１０を架設すると共に、左右一対の施療子ユニット６（図３（ｂ）では一方の施療子ユニット６のみを示している）を取り付けたもので、一方のギアプレート９上には、叩き駆動用モータ１３が取り付けられており、この叩き駆動用モータ１３の出力がベルト３０を介して叩き駆動軸１０にまで伝達される構造となっている。 As shown in FIGS. 1A and 3, the mechanism block 4 has a width drive shaft 11, a slide guide shaft 12 and a tapping drive shaft 10 installed between a pair of left and right gear plates 9 and a pair of left and right treatments. A child unit 6 (only one treatment element unit 6 is shown in FIG. 3 (b)) is attached. On one gear plate 9, a tapping drive motor 13 is attached. In this structure, the output of the driving motor 13 is transmitted to the driving shaft 10 through the belt 30.

なお、上記の幅駆動軸１１やスライドガイド軸１２、叩き駆動軸１０、及び強弱駆動軸は機構ブロック４内に回転駆動自在に配されるものであり、上記叩き駆動軸１０はその両端に偏心軸部を有するクランク軸として形成されたものである。 The width driving shaft 11, the slide guide shaft 12, the hitting drive shaft 10, and the strength driving shaft are rotatably arranged in the mechanism block 4, and the hitting drive shaft 10 is eccentric at both ends. It is formed as a crankshaft having a shaft portion.

上記機構ブロック４を上下方向Ｂに走行駆動する上下駆動部１４は、駆動源である上下駆動モータ１４ａを正転あるいは逆転駆動することで伝達機構（図示せず）を介して、両端部にピニオン及び走行ローラ２０の軸を正転あるいは逆転駆動するものであり、マッサージ機の背もたれ部３の内部に設けた上下方向ガイドレール（図示せず）に沿って上記走行ローラ２０を上下移動自在に取り付けると共に、上下方向ガイドレールに形成したラック（図示せず）を上記ピニオンに噛み合わせてある。 The vertical drive unit 14 that drives the mechanism block 4 to move in the vertical direction B has pinions at both ends via a transmission mechanism (not shown) by driving the vertical drive motor 14a, which is a drive source, forward or reverse. And the shaft of the traveling roller 20 is normally or reversely driven, and the traveling roller 20 is mounted so as to be vertically movable along a vertical guide rail (not shown) provided in the backrest portion 3 of the massage machine. In addition, a rack (not shown) formed on the vertical guide rail is engaged with the pinion.

また、幅駆動用モータ（図示せず）によって幅駆動軸１１を回転駆動させるとき、に左右一対の施療子ユニット６，６は幅方向（図３（ｂ）のＹ方向）において接近離反し、機構ブロック４内の左右の施療子８ａ，８ｂの間隔を変更する。いわゆる揉みマッサージを実現する。 Further, when the width driving shaft 11 is rotationally driven by a width driving motor (not shown), the pair of left and right treatment element units 6 and 6 approach and separate in the width direction (Y direction in FIG. 3B), The interval between the left and right treatment elements 8a and 8b in the mechanism block 4 is changed. Realize so-called massage massage.

一方、叩き駆動用モータ１３でクランク軸である叩き駆動軸１０を回転させると、施療アーム７が前後方向（図３（ｂ）のθ方向）に揺動し、施療アーム７の両先端部に取り付けられた施療子８ａ，８ｂが前後に細かく動く叩き動作を行なう。 On the other hand, when the tapping drive shaft 10, which is a crankshaft, is rotated by the tapping drive motor 13, the treatment arm 7 swings in the front-rear direction (θ direction in FIG. 3 (b)). The attached treatment element 8a, 8b performs a tapping operation that moves back and forth finely.

なお、上記施療子８の上下動作、揉み動作、叩き動作に関する詳細は、例えば特開２００７−１４４２１号公報等に開示された従来周知の技術を用いることができるので、詳細な説明は省略する。 In addition, since the conventionally well-known technique disclosed by Unexamined-Japanese-Patent No. 2007-14421 etc. can be used for the detail regarding the up-and-down operation | movement of the said treatment element 8, a kneading operation | movement, and a beating operation | movement, detailed description is abbreviate | omitted.

ここで、本発明においては、上下一対のローラー状の施療子８（８ａ,８ｂ）は、図１（ａ）（ｂ）に示すように、施療アーム７の上下両先端部にそれぞれ回転自在に軸支されていると共に、上側の施療子８ａが、その外周面８ｃに対して回転中心８ｄを偏心して施療アーム７に回転自在に軸支されている。これにより、機構ブロック４の上下移動に伴って施療子８ａが背もたれ部３の裏布地部３ａに押し当てられながら背もたれ部３前方Ａへの突出量が変化するような偏心回転を行なうように構成されている。 Here, in the present invention, a pair of upper and lower roller-shaped treatment elements 8 (8a, 8b) are respectively rotatable at both upper and lower ends of the treatment arm 7, as shown in FIGS. The upper treatment element 8a is pivotally supported by the treatment arm 7 so that the rotation center 8d is decentered with respect to the outer peripheral surface 8c. As a result, the treatment element 8a is pressed against the lining fabric portion 3a of the backrest portion 3 along with the vertical movement of the mechanism block 4, and is configured to perform eccentric rotation so that the amount of protrusion to the front A of the backrest portion 3 changes. Has been.

なお、背もたれ部３は、袋状をした布地の内部に、薄い均一な厚さのクッション材を詰めた伸縮性のある柔らかな構造をしており、この布地の裏面（以下、「裏布地部３ａ」という）にローラー状の施療子８が押し当てられるようになっている。なお、布地の材質は例えば、ニット、ナイロン、ジャージィー等でもよい。 The backrest part 3 has a stretchable soft structure in which a cushion material having a thin uniform thickness is packed inside a bag-like cloth, and the back side of the cloth (hereinafter referred to as “backing cloth part”). 3a "), the roller-shaped treatment element 8 is pressed against. The material of the fabric may be knit, nylon, jersey, etc.

しかして、上記構成の左右の施療子ユニット６,６において、それぞれ、上側の施療子８ａが施療アーム７に対して回転中心８ｄを偏心させて取り付けられているので、機構ブロック４を上下移動させると、図２に示すように、左右の上側の施療子８ａがそれぞれ背もたれ部３の裏布地部３ａを前方Ａに押して偏心回転しながら上下方向Ｂに移動するので、施療子８ａの前方Ａへの突出量が変化する。これにより、背筋を縮める作用を少なくして、背筋のばし効果を向上させることができる。つまり、図１（ａ）に示すように施療アーム７に対して施療子８ａの前方Ａへの突出量が大きくなる状態と、図１（ｂ）に示すように前方Ａへの突出量が小さくなる状態とが交互に変化するようになり、図４のグラフで示すように、強弱の感じ方が上下位置で異なるようになり、これによりメリハリのある背筋のばしマッサージが可能となる。 Therefore, in the left and right treatment element units 6 and 6 having the above-described configuration, the upper treatment element 8a is attached to the treatment arm 7 with the rotation center 8d being eccentric, so that the mechanism block 4 is moved up and down. As shown in FIG. 2, the left and right upper treatment elements 8a move in the up-down direction B while rotating eccentrically by pushing the backing cloth part 3a of the backrest part 3 toward the front A, so that the treatment element 8a moves forward A. The amount of protrusion changes. Thereby, the effect | action which shrinks a back muscle can be decreased and the stretching effect of a back muscle can be improved. That is, as shown in FIG. 1 (a), the amount of protrusion of the treatment element 8a to the front A with respect to the treatment arm 7 is large, and the amount of protrusion to the front A is small as shown in FIG. 1 (b). As shown in the graph of FIG. 4, the feeling of strength is different in the vertical position as shown in the graph of FIG. 4, which makes it possible to stretch the back muscles with sharpness.

しかも、従来のような複雑な強弱機構等を用いたり、或いは駆動用モータで施療子８の突出量を変化させたりする構造ではなく、施療子８ａを施療アーム７に対して回転中心８ｄを偏心して取り付けるという簡易な構造で、背筋伸ばし時の背中への刺激を効果的に行なうことができると共に、変化に富んだ背筋のばしや施療を行なうことができる利点がある。 Moreover, it is not a structure in which a complicated dynamic mechanism or the like as in the past is used, or the protruding amount of the treatment element 8 is changed by a driving motor, but the rotation center 8d is biased with respect to the treatment arm 7. With a simple structure that is attached with the heart in mind, there is an advantage that the back can be stimulated effectively when the back is stretched, and that the spine can be stretched and treated in a variety of ways.

さらに、施療子８の前後の進退動作を、揉み動作或いは叩き動作と組み合わせることができる。つまり、揉み動作或いは叩き動作の途中でも、施療子８ａが施療アーム７に対して偏心回転することで施療子８ａの突出量が変化するので刺激が単調にならない。例えば、叩き動作の振幅量を現在の片側約７ｍｍから、片側約２０ｍｍまでに拡大できるようになり、指圧感の向上につながるという利点もある。 Furthermore, the forward / backward movement of the treatment element 8 can be combined with the rubbing action or the hitting action. That is, even during the rubbing operation or the hitting operation, the amount of protrusion of the treatment element 8a changes as the treatment element 8a rotates eccentrically with respect to the treatment arm 7, so that the stimulation does not become monotonous. For example, the amount of amplitude of the hitting operation can be increased from about 7 mm on one side to about 20 mm on one side, leading to an improvement in the feeling of finger pressure.

本発明の他の実施形態として、図５に示すように、施療アーム７の上下両先端部に、上下一対のローラー状の施療子８ａ，８ｂを個別に回転自在に軸支した構造において、各施療子８ａ，８ｂがその外周面８ｃに対して回転中心８ｄを偏心させて回転自在に軸支してもよい。他の構成は図１の実施形態と同様である。本例では、上下一対の施療子８ａ,８ｂの回転中心８ｄをそれぞれ偏心させることで、強弱の感じ方により一層の変化を加えることができ、効果的な背筋伸ばしマッサージができる。また本例では図５のように、上下２個の施療子８ａ,８ｂの偏心が同期しており、この場合、図６（ａ）に示すように、上の施療子８ａと下の施療子８ｂとで、強弱の感じ方が同じとなる。なお、他例として、上下２個の施療子８ａ,８ｂの偏心を同期させない場合、例えば、上の施療子８ａの偏心と下の施療子８ｂの偏心とが逆位相となっている場合は、図６（ｂ）に示すように、上の施療子８ａと下の施療子８ｂとで、強弱の感じ方が相反する状態となるため、より一層、メリハリのある背筋のばしマッサージ効果が得られるようになる。 As another embodiment of the present invention, as shown in FIG. 5, in a structure in which a pair of upper and lower roller-shaped treatment elements 8 a and 8 b are individually pivotally supported at both upper and lower ends of a treatment arm 7, The treatment elements 8a and 8b may be pivotally supported with the rotation center 8d being eccentric with respect to the outer peripheral surface 8c. Other configurations are the same as those of the embodiment of FIG. In this example, the center of rotation 8d of the pair of upper and lower treatment elements 8a and 8b is eccentric, so that further changes can be made depending on how the strength is felt, and an effective back muscle massage can be performed. In this example, as shown in FIG. 5, the eccentricity of the upper and lower treatment elements 8a and 8b is synchronized. In this case, as shown in FIG. 6 (a), the upper treatment element 8a and the lower treatment element 8a. In 8b, the feeling of strength is the same. As another example, when the eccentricity of the upper and lower two treatment elements 8a and 8b is not synchronized, for example, when the eccentricity of the upper treatment element 8a and the eccentricity of the lower treatment element 8b are in opposite phases, As shown in FIG. 6 (b), the upper treatment element 8a and the lower treatment element 8b are in a state in which the feeling of strength is opposite to each other, so that a more straight back massage effect can be obtained. become.

尚、前記実施形態では、側面視く字状をした施療アーム７の上下両先端部に、上下一対のローラー状の施療子８ａ,８ｂを個別に回転自在に軸支した構造を説明したが、施療アーム７の形状及び施療子８の数は、適宜に設計変更自在である。 In the above-described embodiment, the structure in which the pair of upper and lower roller-shaped treatment elements 8a and 8b are individually pivotally supported on the upper and lower ends of the treatment arm 7 that is shaped like a side view has been described. The shape of the treatment arm 7 and the number of treatment elements 8 can be appropriately changed in design.

本発明の一実施形態を示す側面図であり、（ａ）は機構ブロックの施療アームからローラー状の施療子の前方突出量が大きい場合の説明図であり、（ｂ）は同上の施療子の前方突出量が小さい場合の説明図である。It is a side view which shows one Embodiment of this invention, (a) is explanatory drawing in case the amount of front protrusions of a roller-shaped treatment element is large from the treatment arm of a mechanism block, (b) is a treatment element same as the above. It is explanatory drawing when the front protrusion amount is small. 同上の施療子が背もたれ部の裏布地部を前方に押しながら、偏心回転しながら上下方向に移動して背筋のばしマッサージを行なう場合を説明する概略側面図である。It is a schematic side view explaining the case where the treatment element same as the above performs a back muscle massage by moving in the up and down direction while rotating eccentrically while pushing the backing cloth part of the backrest part forward. （ａ）は同上の施療子を備えるマッサージ機の斜視図であり、（ｂ）は同上の機構ブロックの概略斜視図である。(A) is a perspective view of a massage machine provided with the treatment element same as the above, (b) is a schematic perspective view of a mechanism block same as the above. 同上の上下一対の施療子強弱の感じ方が上下位置で異なる場合を説明するグラフである。It is a graph explaining the case where the feeling method of a pair of upper and lower treatment element same as the above is different in an up-down position. 本発明の他の実施形態を示し、（ａ）は上下一対の施療子の前方突出量がそれぞれ小さい場合の説明図であり、（ｂ）は同上の上下一対の施療子の前方突出量がそれぞれ大きい場合の説明図である。The other embodiment of this invention is shown, (a) is explanatory drawing in case the front protrusion amount of a pair of upper and lower treatment element is small, respectively, (b) is the front protrusion amount of a pair of upper and lower treatment element same as the above, respectively. It is explanatory drawing in the case of being large. （ａ）は図５の上の施療子と下の施療子との偏心を同期させた場合において強弱の感じ方が上下位置で同期する場合を説明するグラフであり、（ｂ）は図５の上の施療子と下の施療子との偏心を逆位相とした場合において強弱の感じ方が上下位置で異なる場合を説明するグラフである。(A) is a graph explaining the case where the feeling of strength is synchronized in the vertical position when the eccentricity of the upper treatment element and the lower treatment element in FIG. 5 is synchronized, and (b) is the graph of FIG. It is a graph explaining the case where how to feel strength differs in the up-and-down position in the case where the eccentricity between the upper treatment element and the lower treatment element is in the opposite phase.

Explanation of symbols

１マッサージ機
２座部
３背もたれ部
４機構ブロック
７施療アーム
８（８ａ，８ｂ）施療子
８ｃ施療子の外周面
８ｄ施療子の回転中心
Ａ前方 DESCRIPTION OF SYMBOLS 1 Massage machine 2 Seat part 3 Backrest part 4 Mechanism block 7 Treatment arm 8 (8a, 8b) Treatment element 8c Outer peripheral surface of treatment element 8d Rotation center of treatment element A Front

Claims

A seat where the user sits, and a backrest at the rear end of the seat, with the backrest facing upward substantially, and a mechanism block with a pair of left and right roller-shaped treatment elements housed inside the backrest so that it can move up and down The mechanism block includes a treatment arm for pivotally supporting the treatment element, and the treatment element is pivotally supported by the treatment arm with an eccentric center with respect to the outer peripheral surface. It is configured to perform eccentric rotation so that the amount of forward protrusion changes while the treatment element is pressed against the backing cloth part of the backrest part as the mechanism block moves up and down. Massage machine.

The treatment arm is characterized in that a pair of upper and lower treatment elements are individually pivotally supported, and at least one of the treatment elements is pivotally supported with its center of rotation eccentric with respect to the outer peripheral surface thereof. The massage machine according to claim 1.