JP2010268902A - Chair type massage machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent breaking and malfunction of a chair type massage machine having a foot massaging device disposed in a lifted state relative to the front of a seat portion even if downward loads exceeding an allowance are applied to the foot massaging device and if the downward loads are suddenly relieved thereafter. <P>SOLUTION: The chair type massage machine 1 includes: the seat portion 2; a backrest portion 3 mounted in the rear of the seat portion 2; the foot massaging device 5 set in the front of the seat portion 2; and an advancing/retracting mechanism 15 for advancing the foot massaging device 5 to a use position and retracting the foot massaging device 5 to a stored position. The advancing/retracting mechanism 15 has an impact absorbing mechanism 58 for preventing transmission of an excessive load to the advancing/retracting mechanism 15 when the excessive load, the downward load exceeding the allowance, is applied to the foot massaging device 5 held at the use position, and a position restraining means 80 for preventing the foot massaging device 5 from rising over the use position by the upward impact absorbing force transmitted to the foot massaging device 5 from the impact absorbing mechanism 58. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a chair type massage machine provided with a foot massage device.

As a chair type massage machine provided with a foot massage device, for example, there is one disclosed in Patent Document 1.
This chair type massage machine has a backrest part at the back part of the seat part and a foot massage device at the front part, and the backrest part is equipped with a massage mechanism for massaging the user's back part. Built-in leg massage mechanism to massage the leg of the user. Further, the backrest portion can be reclined back and forth, and the footpad device is swingably provided in front of the seat portion via a support member.

Such a chair type massage machine is not only used for performing a massage, but also often used as a mere chair. In particular, this type of chair-type massage machine often has a soft cushion built in the seat, etc., and the backrest has a reclining function, making it suitable for use as a sofa. It has become.
However, the foot massage device of Patent Document 1 has a holding groove formed on the front surface thereof, so that even if the massage function is not used, the lower limb must be fitted into the holding groove, thereby freeing the foot. Movement was restricted and it was difficult to have a comfortable posture. It also contributed to the loss of the appearance of the chair.

Therefore, in order to avoid such inconvenience, a technique such as Patent Document 2 has already been developed.
This chair type massage machine has a push-pull mechanism that can move between the use position and the storage position where the foot massage device is built under the seat, and this push-pull mechanism is provided on both sides of the chair type massage machine. An installed guide rail, a push-pull rod that goes in and out along the guide rail, and a carriage plate connected to the push-pull rod are connected to the carriage plate in a pivotable manner. Therefore, after the foot massage device is positioned at the use position, the front (massage surface) and the rear surface (foot rest surface) of the foot massage device can be freely switched.

JP 2002-238963 A JP 2007-75590 A

As described above, in the chair type massage machine described in Patent Document 2, the foot massage device is formed in the “use position” where the user's lower limbs can be massaged in front of the seat and below the seat. The “storage position” is moved between.
Recently, in order to enhance a feeling of relaxation when the foot is cramped, it has been proposed to lift the foot grinder from the floor surface at the position of use and to float in the air. In this case, when the foot massage device is held in the use position (when it is suspended in the air), a child may get on the foot massage device inadvertently, an adult may inadvertently sit down, or carry luggage. It is necessary to predict that it will be placed.

That is, when an overload is applied to the foot massage device, that is, when the user sitting on the seat deposits the lower limb on the foot massage device, the load acting on the foot massage device is an allowable load. There is a possibility that a load that far exceeds it is applied. When this happens, the part supporting the foot massaging device, the push-pull mechanism, etc. may be damaged, or the push-pull mechanism may break down.
Therefore, development of a mechanism for avoiding and protecting various damages and failures caused by such an overload has been demanded. However, even if such a mechanism for protection is developed, after an overload is applied to the footpad device, for example, when a child riding on the footpad device suddenly jumps off, it is overloaded at once. The following problems are also expected to occur when a situation occurs in which the problem is removed.

In other words, when the overload is applied to the foot kneading device, the protecting mechanism is to absorb this overload by the upward buffering force, so when the downward overload is removed all at once. The upward shock-absorbing force stored in the protecting mechanism is also released at a stretch, and as a result, the foot kneading device rises beyond the normal use position. Due to this, there is a possibility that problems such as breakage of the portion supporting the foot massaging device, the push-pull mechanism, etc., or failure of the push-pull mechanism occur.
Therefore, in view of the above problems, the present invention may be applied even when a downward load exceeding an allowable amount is applied to the foot kneading device when the foot kneading device is held at the use position (when floating). It is an object of the present invention to provide a chair type massage machine that is configured not to be damaged or broken, and not to be broken or broken when the downward load is removed.

In order to achieve the above object, the present invention takes the following technical means.
That is, the chair-type massage machine according to the present invention includes a seat, a backrest provided at the rear of the seat, a foot massage device provided at the front of the seat, and the foot massage device. A chair type massage machine comprising an advance / retreat mechanism that moves between a use position floating in the air in front of the seat and a storage position below the seat, and a drive source that drives the advance / retreat mechanism, The connecting portion between the advancing / retreating mechanism or the foot-gearing device and the advancing / retreating mechanism is directed upward to the foot-gripping device when an overload, which is a downward load exceeding the allowable value, is applied to the foot-gearing device held in the use position. The cushioning mechanism prevents the overload from being transmitted to the advancing / retreating mechanism by applying a cushioning force, and the upward cushioning force transmitted from the cushioning mechanism to the footgrip device raises the footgrip device beyond the use position. And position restricting means for preventing The features.

Preferably, the position restricting means includes a non-stretchable string-like member that connects between a leg frame that supports the seat portion above the floor surface and a foot massage device held in the use position. It should be.
The forward / backward mechanism is provided with a forward extension mechanism that allows the foot gripping device in the use position to extend forward while remaining in a floating state. The forward extension mechanism includes a support frame coupled to the forward / backward mechanism, and the support frame. And a movable frame that is slidable in the length direction of the user's legs with respect to the frame and to which the above-mentioned foot grinder is attached, and is a non-stretchable string that is the position restricting means One end of the member may be attached to the support frame of the front extension mechanism.

  According to the chair type massage machine according to the present invention, when the foot massage device floats in the air at the use position, even if a downward load exceeding the tolerance is applied to the foot massage device, it does not cause breakage or failure, In addition, even when the downward load is removed, no damage or failure occurs.

It is a side view of a chair type massage machine when a foot massage device is in a use position. It is a side view of a chair type massage machine when a foot massage device exists in a storing position. It is side surface sectional drawing of a chair type massage machine when a foot massage device exists in a use position. It is the perspective view seen from the arrow A direction of FIG. It is the bottom view which showed the state which the foot kneading apparatus retracted by the front expansion | extension mechanism. It is the bottom view which showed the state which the foot kneading apparatus extended | stretched with the front expansion | extension mechanism. It is the perspective view which expanded and showed the front extension mechanism. It is sectional drawing which showed the rocking | swiveling drive part of the advance / retreat mechanism. It is a perspective view of a chair type massage machine. It is side surface sectional drawing which showed the modification of the position control means.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 9 show an embodiment of a chair type massage machine 1 according to the present invention. In some drawings, for convenience of explanation, part of the structure is omitted as necessary.
The chair type massage machine 1 has a seat portion 2 and a backrest portion 3 provided at the rear portion of the seat portion 2. At the front part of the seat 2, a foot massage device 5 for massaging and massaging the lower limbs (calves, ankles and toes) of the user seated on the seat 2 is provided.

As shown in FIGS. 1 and 2, a leg frame 6 for installing the chair type massage machine 1 on the floor surface F is provided at the lower part of the seat portion 2, and the seat portion 2 is provided by the leg frame 6. Is supported at a predetermined height from the floor surface F.
As shown in FIG. 9, armrests 7 are provided so as to sandwich both sides of the seat portion 2, and the leg frames 6 are hidden by these armrests 7 so that they cannot be seen from the outside.
In the following description, the right / left direction in FIG. 1 is referred to as the front / rear direction in the actual apparatus, and the up / down direction in FIG. 1 is referred to as the up / down direction in the actual apparatus. 1 is referred to as a right / left direction or a width direction in an actual apparatus. These directions coincide with those seen from the user sitting on the chair type massage machine 1.

The seat portion 2 is wide enough to support the user's buttocks from below. The lower part of the backrest part 3 is pivotally supported so that it can swing back and forth with respect to the rear part of the seat part 2 or the rear part of the leg frame 6. The backrest 3 can be reclined by a reclining mechanism (not shown) such as a linear actuator mechanism disposed in the leg frame 6.
Inside the backrest 3, a back massage mechanism (not shown) that performs massage operations such as squeezing, striking, or vibrating the back of the user is provided so as to be movable up and down.
The foot massage device 5 has a substantially square shape when viewed from the front, and a box shape that exhibits a rounded triangular shape when viewed from the side. A pair of left and right holding grooves 10, 10 that allow the user to fit the left and right lower limbs are formed in front of the foot massage device 5.

Inside each holding groove 10 is incorporated a lower limb massage device that massages the lower limbs. This lower limb massage device is configured to itch by swinging a plate that is long in the length direction of the foot left and right, or to be squeezed with an air bag that expands and contracts by air supply and discharge. Can do.
As shown in FIG. 1, an advance / retreat mechanism 15 is provided below the seat portion 2, and the leg frame 6 of the seat portion 2 and the foot kneading device 5 are connected via the advance / retreat mechanism 15. When the advancing / retreating mechanism 15 moves forward, the foot kneading device 5 is lifted from the floor surface F in front of the seat 2 and proceeds to a use position U (see FIG. 1) where the user's lower limb can be massaged. Further, when the advancing / retreating mechanism 15 moves backward, the foot kneading device 5 is stored in a storage position P (see FIG. 2) formed below the seat portion 2.

FIG. 3 shows a use state (use position U) of the foot massage device 5.
As is clear from this figure, the advancing / retracting mechanism 15 includes a link 16 whose base end portion is rotatably connected to the leg frame 6 and a swing drive that applies a driving force for swinging back and forth to the link 16. Part 17, a moving frame 30 provided at the tip of link 16 and to which footpad device 5 is attached, and rolling wheel 18 provided at the lower end of the backside of footpad device 5 and movable on floor F. And have.
Specifically, the link 16 is formed in a shape that curves in a C shape when viewed from the side, and is placed on the stationary pivotal support 35 provided on the upper side in the leg frame 6 and on the upper part of the back support frame 32 that constitutes the moving frame 30. The movable pivot part 36 (shaft part) provided is connected. The stationary pivot portion 35 and the movable pivot portion 36 hold the link 16 so as to be relatively pivotable about a pivot shaft whose axis is directed in the left-right direction. Therefore, the link 16 is configured such that the movable pivot 36 is swingable in the front-rear direction with the stationary pivot 35 as a fulcrum.

  Further, as shown in FIG. 3, a rotation angle limiting portion 40 is provided at the distal end portion of the link 16. The rotation angle restricting portion 40 is moved when the link 16 swings forward so that the movable support portion 36 is raised, and the angle θ between the back surface of the foot grinder 5 and the distal end portion of the link 16 reaches a predetermined value. This is maintained at this predetermined value. Due to the action of the rotation angle restricting unit 40, when the foot massaging device 5 is further moved forward, the entire foot massaging device 5 is lifted from the floor surface F. The rotation angle limiting portion 40 of the present embodiment includes a stopper piece 41 that is provided in a square shape that projects L-shaped with respect to the back support frame 32 of the moving frame 30, and the stopper piece 41 projects against the link 16. It is comprised with the contact stop piece 42 provided in the position contact | abutted to a contact shape.

On the other hand, the moving frame 30 is provided at the distal end portion of the link 16 as described above, and the foot massaging device 5 is attached thereto. In the moving frame 30, a back support frame 32 connected to the link 16 and a bottom support frame 31 to which the bottom surface of the footpad device 5 is attached are assembled in an L shape in a side view. On the upper side of the back support frame 32, a moving pivot support 36 for connecting to the link 16 is provided.
Further, as shown in FIG. 7, the advance / retreat mechanism 15 has a front extension mechanism 47 that extends the foot kneading device 5 in the use position further forward while floating. The front extension mechanism 47 includes a back support frame 32 and a biasing member 48 attached to the back support frame 32.

  Specifically, the rear support frame 32 includes a support frame 51 and a movable frame 50 that is slidably supported in the front-rear direction with respect to the support frame 51. The longitudinal length of the support frame 32 itself is variable. An urging member 48 (gas cylinder) is disposed at the center position in the frame of both the frames 50 and 51. The base end of the biasing member 48 is connected to the movable frame 50, and the tip of the rod is connected to the support frame 51. The biasing member 48 always biases the foot gripping device 5 in the use position backward. .

In order to resist the urging force of the urging member 48, the foot kneading device 5 is pushed forward with a user's foot or the like, both the frames 50, 51 are slid to each other, and the back support frame 32 is extended, thereby the foot kneading. The device 5 can be projected forward. On the contrary, both the frames 50 and 51 slide in opposite directions by the urging force when the urging member 48 is extended, and the length of the back support frame 32 is shortened.
As shown in FIG. 8, the swing drive unit 17 of the advance / retreat mechanism 15 includes an electric motor 55 and an expansion / contraction mechanism 56 that expands / contracts using the electric motor 55 as a drive source. In the description of the telescopic mechanism 56 and the like, the left and right in FIG.

The expansion / contraction mechanism 56 is rotatably connected to a base bracket 61 provided at the rear end portion of the leg frame 6. A lever member 62 is rotatably connected to the front end of the telescopic mechanism 56. The lever member 62 moves in conjunction with the link 16 by rotating integrally with the stationary pivot support 35.
The expansion / contraction mechanism 56 includes an outer cylinder 65 formed in a cylindrical shape along the expansion / contraction operation direction (front-rear direction), and a cylindrical propulsion shaft 66 that is inserted into the outer cylinder 65 so as to freely move in and out. Have. A screw shaft 67 is accommodated in the outer cylinder 65, and the screw shaft 67 can be driven to rotate by the electric motor 55.

A taper nut 68 is screwed onto the screw shaft 67. On the other hand, a cylindrical cap body 70 is fitted on the rear end side of the propulsion shaft 66. A tapered recess 71 into which the conical surface of the taper nut 68 is fitted (having the same taper angle) is formed at the radial center of the cap body 70. The wedge coupling state between the cap body 70 and the taper nut 68 is maintained by the biasing force of the coil spring 73 provided behind the taper nut 68.
With this configuration, by rotating the electric motor 55, the taper nut 68 moves along the screw shaft 67, and as a result, the propulsion shaft 66 moves back and forth with respect to the outer cylinder 65 (the telescopic mechanism 56 expands and contracts). Become.

The expansion / contraction operation of the expansion / contraction mechanism 56 is the operation of the swing drive unit 17, and the advance / retreat mechanism 15 rotates the lever member 62 around the rotation shaft of the stationary pivot support unit 35 by the operation of the swing drive unit 17. The foot massaging device 5 is moved between the use position U and the storage position P while integrally rotating the link 16 together with the lever member 62 (rotation shaft). That is, when the telescopic mechanism 56 is extended, the foot kneading device 5 is moved to the use position U, and when the telescopic mechanism 56 is contracted, the foot kneading device 5 is stored in the storage position P.
By the way, a buffer mechanism 58 is provided inside the telescopic mechanism 56 of the present embodiment. The buffer mechanism 58 includes a coil spring 74 housed in a cylinder of the propulsion shaft 66, and the coil spring 74 can freely move in and out of the cap body 70 provided on the rear end side of the propulsion shaft 66 and the front end side of the propulsion shaft 66. The hinge head 75 is sealed in a sandwiched state.

The hinge head 75 is formed thinner than the cylindrical inner diameter of the propulsion shaft 66, but a spring receiver 76 having a diameter equal to or slightly smaller than the cylindrical inner diameter of the propulsion shaft 66 is coupled to the rear end portion of the hinge head 75. ing. The front end of the coil spring 74 is in contact with the spring receiver 76.
Further, a sleeve body 77 through which the hinge head 75 passes but not the spring receiver 76 is coupled to the front end side of the propulsion shaft 66, and the hinge head 75 is prevented from coming off from the propulsion shaft 66 forward by the sleeve body 77. ing. A lever member 62 (see FIG. 3) is swingably connected to the hinge head 75 via a hinge shaft 78.

For this reason, the cap body 70 and the hinge head 75 (spring receiver 76) can shorten the distance between them while resisting the spring force of the coil spring 74, and the propulsion shaft 66 has a "linear damper". Constitute.
The spring force by which the coil spring 74 urges the cap body 70 and the hinge head 75 in the direction away from each other is maintained (not compressed) when the foot massaging device 5 is moved from the storage position P to the use position U. Is set. The coil spring 74 is compressed when a downward overload is applied to the foot kneading device 5 when the foot kneading device 5 is in a suspended state after reaching the use position U. is there.

Such a buffer mechanism 58 can be configured to use oil pressure, air pressure, or the like instead of using the coil spring 74. The buffer mechanism 58 may be configured by providing a rotation damper means such as a coil spring on the rotation shaft of the stationary support portion 35.
Since such a buffer mechanism 58 has an operation principle of absorbing a downward overload applied to the foot kneading device 5 by an upward buffer force, when the downward overload is removed at once, the buffer mechanism 58 The stored upward cushioning force is also released at once, and as a result, the foot kneading device 5 may be raised beyond the normal use position U (see FIG. 3).

Therefore, in the present invention, as shown in FIGS. 1 and 3 to 7, the position restricting means 80 is provided at the connecting portion between the advance / retreat mechanism 15 or the foot kneading device 5 and the advance / retreat mechanism 15. The position restricting means 80 includes a non-stretchable string-like member 81 that connects the leg frame 6 and the foot kneading device 5 held at the use position U.
As shown in FIGS. 3 and 4, the attachment position of the string-like member 81 with respect to the leg frame 6 is provided at a position corresponding to the lower end of the front strut 85 that supports the seat portion 2, that is, below the front end of the seat portion 2. The front crosspiece 86 is the center position in the left-right direction.

As shown in FIG. 7, the attachment position of the string-like member 81 with respect to the foot massaging device 5 is attached to the support frame 51. As described above, the forward extension mechanism 47 has the movable frame 50 and the support frame 51, and a protruding anchor member 87 is fixed to the inside of the support frame 51. One end of the member 81 is attached by screwing or the like.
As the string-like member 81, for example, a belt material such as a polyester fiber used for a seat belt or a safety belt, a nylon belt, or the like can be used. Of course, the shape of the string-like member 81 is not limited to the belt shape, and may be a rope or a round string.

The string-like member 81 spanned between the anchor member 87 and the front beam 86 is the foot massaging device 5 (the front surface of the foot massaging device 5 is approximately the same height as the upper surface of the seat portion 2) at the use position U in FIG. ), The length is set so as to be in a state where tension exists (a state in which the tension is tight). Since the string-like member 81 having such a length is non-stretchable, the maximum distance between the foot kneading device 5 and the leg frame 6 (front beam 86) can be made constant, and after the overload is released It becomes possible to reliably prevent the foot kneading device 5 from jumping upward from the upper surface position of the seat portion 2.
Regarding the advancing / retreating mechanism 15 having the above-described configuration, the operation, that is, the advancing / retreating operation of the foot massage device 5 will be described.

First, as shown in FIG. 2, the foot kneading device 5 is in the storage position P below the seat 2. At this time, the foot kneading device 5 has a bottom surface facing forward, a front surface (surface on which the holding grooves 10 and 10 are provided) facing upward, and the bottom surface is substantially flush with the front end portion of the seat portion 2. ing.
When the electric motor 55 of the swing drive unit 17 is operated, the telescopic mechanism 56 starts to extend, and the rotation shaft of the stationary pivot support unit 35 starts to rotate at the front end (lever member 62). Accordingly, the link 16 is configured such that the movable pivot part 36 swings forward with the stationary pivot part 35 as a fulcrum, and the rolling device 18 rolls on the floor F while the foot massaging device 5 is The upper part of the back is advanced forward.

As the link 16 swings further forward, the upper part of the back of the foot kneading device 5 rises and comes out more forward than the lower front end of the seat 2. As shown in FIG. 1, the foot massaging device 5 ascends as a whole and reaches the use position U. A series of these operations is the advance operation of the advance / retreat mechanism 15.
The foot massage device 5 that has reached the use position U is in a horizontal state or a front-down direction in which the bottom surface faces the floor surface F, the bottom surface faces forward, and the front surface that massages the lower limbs is substantially flush with the upper surface of the seat 2. It is in a state of facing upwards while continuing in a bent state.

If the user operates the lower limb massage mechanism in a state where one foot is inserted into each holding groove 10, 10 of the foot massage device 5, a comfortable massage can be received. At this time, since the foot massaging device 5 ascends as a whole, the user has a relaxed posture in which his / her foot is thrown forward, and it is not necessary to bend the knee extremely, so that the feeling of use can be enhanced.
When the electric motor 55 of the swing drive unit 17 is reversely operated from the use position U, the expansion / contraction mechanism 56 starts to contract and the foot massaging device 5 is stored in the storage position P.
On the other hand, as shown in FIG. 1, when the foot kneading device 5 is held at the use position U (when it is suspended in the air), for example, a child rides on the foot kneading device 5 with mischief, Suppose that an adult inadvertently sat down or left a baggage. At this time, a downward overload is applied to the foot massage device 5.

At this time, the link 16 provided between the foot massaging device 5 and the advancing / retracting mechanism 15 has a pivoting action that pushes back the lever member 62 with the pivot shaft of the stationary pivot support 35 as a fulcrum. Therefore, the buffer mechanism 58 operates in the telescopic mechanism 56 of the advance / retreat mechanism 15. That is, the hinge head 75 of the propulsion shaft 66 is pushed rearward, and the coil spring 74 in the propulsion shaft 66 is compressed.
As a result, the overload is prevented from being directly transmitted to the advance / retreat mechanism 15, and the portion supporting the foot massaging device 5 and the advance / retreat mechanism 15 are prevented from being damaged or broken by the overload. Will be able to.

The coil spring 74 is compressed (the buffer mechanism 58 buffers the overload) until the rolling wheel 18 of the foot kneading device 5 reaches the floor surface. Further, when the overload on the foot kneading device 5 is eliminated, the coil spring 74 returns to the original compression force, and the propulsion shaft 66 automatically performs normal pushing action on the foot kneading device 5. It will return to the state.
When the overload on the foot massaging device 5 is resolved, for example, when a child who rides on the foot massaging device 5 suddenly jumps down and the overload is removed at once, it is stored in the buffer mechanism 58. The upward buffering force is also released at a stretch.

  However, a position restricting means 80 (non-stretchable string-like member 81) is provided at a connecting portion between the advance / retreat mechanism 15 or the foot kneading device 5 and the advance / retreat mechanism 15. Since this string-like member 81 does not extend beyond a predetermined length, the maximum distance between the foot kneading device 5 and the leg frame 6 (front bar 86) can be made constant, and the foot after the overload is released. It becomes possible to reliably prevent the kneading device 5 from jumping upward from the upper surface position of the seat portion 2. That is, there is no possibility that the foot kneading device 5 will rise beyond the normal use position U (see FIGS. 1 and 3), and the portion supporting the foot kneading device 5, the advancing / retracting mechanism 15 or the like may be damaged or There is no problem that the mechanism 15 breaks down.

By the way, as shown in FIG. 10, the second member formed of the same material as the string-like member 81 between the middle part in the longitudinal direction and the middle part of the link 16 with respect to the string-like member 81 of the position regulating means 80. The string-like member 90 may be constructed in advance.
In this way, when the foot kneading device 5 is stored in the storage position P below the seat 2, the second string-like member 90 causes the string-like member 81 to move to the seat 2 along with the storing operation of the link 16. It will be pulled in to the lower side. Therefore, it is possible to reliably avoid the inconvenience that a part of the string-like member 81 is exposed to the front of the seat portion 2 after the foot massage device 5 is stored.

Note that the second string-like member 90 can be formed of a material different from that of the string-like member 81. In some cases, it can be formed of a stretchable material such as a rubber string or a spring.
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The present invention can be applied to a foot massage device attached to a chair type massage machine, and can also be applied to a sofa, a vehicle seat, and the like.

DESCRIPTION OF SYMBOLS 1 Chair type massage machine 2 Seat part 3 Backrest part 5 Foot massage device 6 Leg frame 7 Armrest 10 Holding groove 15 Advance / Retreat mechanism 16 Link 17 Swing drive part 18 Rolling wheel 30 Moving frame 31 Bottom support frame 32 Back support frame 35 Stationary pivot Supporting part 36 Moving pivotal support part 40 Rotation angle limiting part 41 Stopper piece 42 Stopping piece 47 Forward extension mechanism 48 Biasing member 50 Movable frame 51 Support frame 55 Electric motor 56 Telescopic mechanism 58 Buffer mechanism 61 Base bracket 62 Lever member 65 Outer cylinder 66 Propulsion shaft 67 Screw shaft 68 Tapered nut 70 Cap body 71 Tapered recess 73 Coil spring 74 Coil spring 75 Hinge head 76 Spring receiver 77 Sleeve body 78 Hinge shaft 80 Position restricting means 81 String member 85 Front strut 86 Front beam 87 Anchor member 90 Second String Member θ Angle F Floor P Storage position U Usage position

Claims (3)

A seat portion, a backrest portion provided at the rear portion of the seat portion, a foot massage device provided at the front portion of the seat portion, and a use position where the foot massage device is suspended in the air in front of the seat portion; A chair-type massage machine comprising an advance / retreat mechanism that moves between a storage position below the seat and a drive source that drives the advance / retreat mechanism,
The connecting portion between the advancing / retreating mechanism or the foot-gearing device and the advancing / retreating mechanism is provided with an upward load on the foot-gripping device when an overload, which is a downward load exceeding the allowable value, is applied to the foot-gearing device held in the use position. A buffer mechanism that applies a buffering force to prevent the overload from being transmitted to the advance / retreat mechanism; and
Position restricting means for preventing the foot gripping device from rising beyond the use position by an upward buffering force transmitted from the buffering mechanism to the foot gripping device;
A chair type massage machine characterized by comprising:   The position restricting means includes a non-stretchable string-like member that connects a leg frame that supports the seat portion above a floor surface and a foot kneading device held at the use position. The chair type massage machine according to claim 1. The forward / backward mechanism is provided with a front extension mechanism that enables the foot gripping device in the use position to extend forward while in a floating state,
The forward extension mechanism includes a support frame connected to the advance / retreat mechanism, a movable frame that is slidable in the length direction of a user's leg with respect to the support frame, and to which the foot grinder is attached. , And
The chair type massage machine according to claim 2, wherein one end portion of the non-stretchable string-like member as the position restricting means is attached to a support frame of the front extension mechanism.

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