Supporting arm of massager

Abstract

The invention provides a support arm of a massager, which can restrain loosening at a connecting structure of an arm main body and a grab handle part. A support arm (1) for a massager (9) is provided with: a columnar arm body (10) to which the massager is attached; and a columnar grip member (20) that is gripped by a user and has a grip-side connection section (37) that is detachably connected to an arm-side connection section (31) positioned at one end of the arm body, one of the arm-side connection section (31) and the grip-side connection section (37) having a connection protrusion (35) that protrudes toward the other, and the other of the arm-side connection section (31) and the grip-side connection section (37) having a connection protrusion (35) that protrudes toward the other of the arm-side connection section (31) and the grip-side connection section (37). And a coupling hole (21b) into which a coupling projection (35) is inserted and which restricts relative rotation between the one and the other, the one having either a nut (36) or a male screw (21f) screwed to the nut, and the other having the other of the nut (36) and the male screw (21f).

Description

Technical Field

[0001] The invention relates to a supporting arm of a massager. Background Art

[0002] Patent Document 1 discloses a handheld massager that massages human muscles by vibration, and an arm member to which the massager is mounted and for pressing a massage head against a massaged area such as the back.

[0003] In order to facilitate gripping of the arm member disclosed in Patent Document 1, it is conceivable to attach a grip member to the base end portion of the arm member.

[0004] Prior art literature Patent Literature Patent Document 1: Japanese Utility Model Publication No. 57-145423 Summary of the invention

[0005] Technical issues However, in the connection structure in which the external thread provided at the base end of the arm member is screwed into the internal thread provided at the grip member for connection, there is a problem that the connection portion becomes loose due to vibration of the massager or swinging of the center of gravity.

[0006] In addition, in the connection structure between the arm member and the handle member, it is desired that the arm member and the handle member be detachable for storage or from the perspective of ease of assembly by the user.

[0007] An object of the present invention is to provide a support arm of a massager capable of suppressing looseness in a connection structure between an arm body and a grip member.

[0008] Technical Solution One embodiment of the present invention provides a support arm of a massager, comprising: a columnar arm body on which the massager is installed; and a columnar handle component, which is gripped by a user and has a handle-side connecting portion, wherein the handle-side connecting portion is detachably connected to an arm-side connecting portion located at an end portion of one side of the arm body, one of the arm-side connecting portion and the handle-side connecting portion having a connecting protrusion protruding toward the other of the arm-side connecting portion and the handle-side connecting portion, the other of the arm-side connecting portion and the handle-side connecting portion having a connecting hole portion for inserting the connecting protrusion to limit the relative rotation between the arm body and the handle component, the one of the arm-side connecting portion and the handle-side connecting portion having either a nut or an external threaded portion threadedly engaged with the nut, and the other of the arm-side connecting portion and the handle-side connecting portion having the other of the nut and the external threaded portion.

[0009] According to one embodiment of the present invention, the connecting protrusion and the connecting hole can be used to limit the relative rotation between the arm body and the handle part, and the arm body and the handle part can be connected using the external thread part and the internal thread part of the nut. Therefore, the arm body and the handle part can be connected without using tools, etc., and looseness between the arm side connecting part and the handle side connecting part can be suppressed.

[0010] Technical Effects According to the support arm of the massager of the present invention, looseness in the connection structure between the arm body and the grip member can be suppressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a perspective view of a state where a massager is mounted on a support arm according to an embodiment of the present invention.

[0012] Figure 2 It is a cross-sectional view along the axis of the handle part of the support arm.

[0013] Figure 3 Yes Figure 2 The portion indicated by arrow III is enlarged and is an enlarged cross-sectional view showing a state before the arm body and the grip member are connected.

[0014] Figure 4 It is an exploded cross-sectional view of the connection structure.

[0015] Figure 5 Yes Figure 3 The arm body and the handle member are connected along the Figure 3 Cross-sectional view of line VV.

[0016] Figure 6 Yes Figure 3 The arm body and the handle member are connected along the Figure 3 Cross-sectional view along line VI-VI.

[0017] Figure 7 It is a schematic diagram showing a state where the massager attached to the support arm is used.

[0018] Figure 8 This is a modified example of the cross section of the connecting protrusion.

[0019] Fig. 9 This is a modified example of the connection structure.

[0020] Explanation of symbols 1: Support arm 9: Massager 10: Arm body 11: Part 1 11b: Upper end 12: First bend 13: Part 2 13a: Front end 20: Handle parts 21b: Connection hole 21f: External thread 22a: First shell 22b: Second shell 31: Arm side connection 37: Handle side connection 35: Connecting convex part 36: Nut 36d: Internal thread C1: Axis PL: Parting Line S2: Section DETAILED DESCRIPTION

[0021] The following is an explanation of the embodiments of the present invention according to the accompanying drawings. It should be noted that the following description is essentially for illustration only and is not intended to limit the present invention, its application objects or its use. In addition, the accompanying drawings are schematic, and the ratios of various dimensions are different from the ratios of actual dimensions.

[0022] The present invention relates to a support arm for a massager. First, a massager 9 inserted into a support arm 1 will be described.

[0023] like Figure 1 As shown, the massager 9 has a main body 91, a protruding portion 92, and a massage head (hereinafter, sometimes referred to as a head) 93. The main body 91 is cylindrical. The main body 91 accommodates a drive mechanism (not shown) such as a motor and a battery for vibrating (reciprocating) the head 93 between a protruding position and a retreated position.

[0024] The protrusion 92 extends in a direction 95 orthogonal to the longitudinal direction 94 of the main body 91. The protrusion 92 contains a connecting rod component for converting the rotational motion of the driving mechanism into a linear motion and transmitting it to the head 93. The head 93 is detachably mounted on the front end of the protrusion 92 in a reciprocating manner. The massager 9 is used by pressing the head 93 against the massaged part of the user and reciprocating the head 93.

[0025] Next, the support arm 1 will be described. In the following description of the embodiment, the terms such as "upper", "lower", "left", "right", "front", "back", "height", "width", "front and back" and the like indicating directions refer to the direction of the support arm 1 unless otherwise specified. Figure 2As shown, the direction when the grip member 20 of the support arm 1 is arranged on the front side of the user and the axis C1 of the grip member 20 extends in the vertical direction when viewed from the user side. The "up-down direction" used in the following description is set as the extension direction of the axis C1, the "front-rear direction" is set to be orthogonal to the "up-down direction" and the user side is set as the rear, and the opposite direction is set as the front, and the "width (left-right) direction" is set as the left-right direction of the user.

[0026] like Figure 1 As shown, the support arm 1 includes a columnar arm body 10 on which the massager 9 is mounted, a columnar grip member 20 gripped by a user, and a connection structure 30 connecting the arm body 10 and the grip member 20 .

[0027] Reference Figure 2 The arm body 10 is formed of a hollow columnar member such as aluminum alloy. The arm body 10 includes a first portion 11 extending upward from the front end of the grip member 20, a first bent portion 12 continuous with the upper end of the first portion 11, and a second portion 13 connected to the first portion 11 via the first bent portion 12.

[0028] The first portion 11 has a base end 11a located on the grip member 20 side and an upper end 11b continuous with the first curved portion 12. The first portion 11 extends from the base end 11a toward the side opposite to the grip member 20. The first portion 11 has a second curved portion 14 between the base end 11a and the upper end 11b.

[0029] The first portion 11 includes a lower portion 14a extending linearly on the handle member 20 side relative to the second curved portion 14, and an upper portion 14b extending linearly on the upper end portion 11b side relative to the second curved portion 14. The lower portion 14a extends upward along the axis C1 of the handle member 20, and the axis C2 of the lower portion 14a coincides with the axis C1. The upper portion 14b is inclined rearward relative to the axis C1 of the handle member 20. The second curved portion 14 makes the upper portion 14b inclined rearward relative to the lower portion 14a and the handle member 20. The angle α1 formed between the extending direction of the axis C2 of the lower portion 14a and the extending direction of the axis C3 of the upper portion 14b is, for example, not less than 15 degrees and not more than 20 degrees, and is preferably set to about 18 degrees. In addition, although not shown in the figure, a stopper is provided on the lower portion 14a, which prevents the nut 36 described later from passing over the second curved portion 14 and moving to the upper portion 14b. The stopper portion can be freely set as long as a portion of the lower portion 14a is formed into a tapered portion with an expanded diameter upward, or a crushed portion such as a riveted portion, a convex portion formed by a die, a bulge, etc. can abut against the upper surface of the nut 36 to prevent upward movement.

[0030] The second portion 13 is inclined backward and downward from the front end side of the first curved portion 12. The first curved portion 12 causes the second portion 13 to be inclined backward and downward relative to the extension direction of the axis C1 of the grip member 20. The angle α2 formed between the extension direction of the axis C3 of the upper portion 14b and the extension direction of the axis C4 of the second portion 13 is larger than the angle α1, for example, greater than 75 degrees and less than 85 degrees, preferably about 80 degrees. The first curved portion 12 separates the front end portion 13a of the second portion 13 backward relative to the axis C1. Such an angle α2 of the arm body 10 is a shape that makes it easy to massage the back with the massager 9 even if the grip member 20 is not lifted significantly upward.

[0031] A holder 40 for detachably holding the massager 9 is disposed at the front end portion 13a of the second portion 13. The holder 40 is made of a synthetic resin such as ABS resin or polycarbonate. The holder 40 is separated rearward with respect to the axis C1.

[0032] like Figure 1 and Figure 2 As shown, the holder 40 has a peripheral wall portion 41 and a boss portion 42 for mounting on the support arm 1. The extending direction of the axis O1 of the peripheral wall portion 41 coincides with the extending direction of the axis C4 of the second portion 13, and the peripheral wall portion 41 is cylindrical with an opening in the direction of the axis C4 of the second portion 13. The peripheral wall portion 41 is provided with a cutout portion 43 obtained by cutting the peripheral wall portion 41 so that the inside and outside of the peripheral wall portion 41 are connected.

[0033] like Figure 1 As shown, the massager 9 is installed on the retaining frame 40 by inserting the massager 9 from the front end side of the peripheral wall portion 41 while aligning the length direction 94 of the main body 91 with the axis line O1 of the peripheral wall portion 41 and inserting the protrusion 92 of the massager 9 through the cutout portion 43.

[0034] like Figure 2 As shown, the grip member 20 is detachably connected to the arm body 10 via a connection structure 30. The upper end of the grip member 20 is connected to the base end 11a of the first portion 11. The extending direction of the axis C1 of the grip member 20 coincides with the extending direction of the axis C2 of the lower portion 14a.

[0035] The grip member 20 includes a grip core 21 connected to the lower portion 14 a and a housing 22 attached to the outside of the grip core 21 .

[0036] The grip core 21 is a hollow cylindrical aluminum alloy. The grip core 21 extends in the up-down direction. The upper end 21a ( Figure 3 ) has a portion of a connecting structure 30 connected to the arm body 10. The connecting structure 30 will be described in detail later.

[0037] The grip core 21 has a through hole 21g extending in a direction perpendicular to the axis C1 of the grip member 20. In this embodiment, the through holes 21g are provided at two locations, the upper end side and the lower end side of the grip core 21. A protrusion 22c provided protruding from the housing 22 is inserted through the through hole 21g.

[0038] The housing 22 is located outside the grip core 21 and extends along the axis C1. The housing 22 is provided at an upper end 21a ( Figure 3 The external threaded portion 21f (shown) Figure 3 The housing 22 is formed of, for example, a synthetic resin.

[0039] like Figure 1 As shown, the housing 22 includes a first shell 22a and a second shell 22b which are divided along the direction in which the axis C1 of the grip member 20 extends. The first shell 22a and the second shell 22b are divided on one side and the other side in the width direction. The first shell 22a and the second shell 22b are arranged to overlap in the width direction with the grip core 21 sandwiched therebetween. The cross-section of the first shell 22a and the second shell 22b viewed along the axis C1 direction is C-shaped (see FIG. 2 ). Figure 6 ).

[0040] like Figure 1 and Figure 2 As shown in FIG. 1 , a parting line PL is formed on the mating surface between the first housing 22a and the second housing 22b. In the present embodiment, the parting line PL is located in the front-to-rear direction of the handle member 20 and extends in the up-down direction. Figure 1 As shown, when the support arm 1 is not held by the user and is placed on a horizontal placement surface, the support arm 1 is on one side in the width direction ( Figure 1 In the state where the support arm 1 is placed, the parting line PL is suppressed from appearing when viewed from the vertical direction.

[0041] like Figure 2 As shown, at the upper end side and the lower end side of the first shell 22a and the second shell 22b, protrusions 22c that engage with each other are respectively provided at positions corresponding to the through hole 21g of the grip core 21. The protrusions 22c are inserted through the through hole 21g of the grip core 21, and engage with each other at the inner circumference of the grip core 21. Thus, the position of the housing 22 is fixed relative to the grip core 21. The parting line PL is located in the front-to-back direction of the grip member 20 (a direction orthogonal to the axis C1 and the extending direction of the through hole 21g) and extends along the axis C1.

[0042] Reference Figures 3 to 6 The connection structure 30 will be described.

[0043] like Figure 3 and Figure 4 As shown, the connection structure 30 includes an arm-side connection portion 31 provided on the arm body 10 , and a grip-side connection portion 37 provided on the grip member 20 .

[0044] The arm-side connecting portion 31 includes a connecting protrusion 35 that protrudes from the base end portion 11 a of the first portion 11 toward the grip-side connecting portion 37 , and a nut 36 that is disposed outside the first portion 11 .

[0045] The connecting protrusion 35 is provided on the connecting member 32, and the connecting member 32 is inserted into the fixing hole 11c arranged at the base end 11a and fixed. The nut 36 can rotate relative to the arm body 10. The fixing hole 11c is formed by enlarging the inner diameter D1 of the first part 11. The dimension d1 of the fixing hole 11c in the front-back direction is larger than the inner diameter D1 of the first part 11 (see Figure 5 ).

[0046] Reference Figure 3 and Figure 4 The connecting member 32 is mounted on the base end portion 11a of the first portion 11. The connecting member 32 is made of aluminum alloy and has a flange portion 34 at the center portion in the vertical direction. The connecting member 32 has a fixing portion 33 located on the upper side of the flange portion 34 and inserted into the fixing hole portion 11c provided in the base end portion 11a to be fixed; and a connecting protrusion 35 located on the lower side of the flange portion 34 and inserted into the connecting hole portion 21b described later.

[0047] The outer diameter D5 of the flange portion 34 is set larger than the outer diameter D4 of the first portion 11 (see Figure 5 When the fixing portion 33 is inserted into the fixing hole 11 c , the flange portion 34 abuts against the lower end surface 11 g of the first portion 11 , thereby determining the insertion amount of the fixing portion 33 , and the flange portion 34 functions as a stopper for the connecting member 32 .

[0048] like Figure 3 As shown in the figure, when the connection member 32 is fixed to the fixing hole portion 11c, the connection protrusion 35 protrudes from the fixing hole portion 11c toward the handle side connection portion 37. The connection protrusion 35 is inserted into the connection hole portion 21b provided at the upper end portion 21a of the handle core portion 21. For the convenience of description, the connection protrusion 35 and the handle side connection portion 37 will be described later.

[0049] like Figure 3 and Figure 4As shown, the nut 36 has an internal thread portion 36d on the inner surface. The nut 36 penetrates in the up-down direction and is arranged on the outer peripheral side of the first portion 11. On the inner diameter side of the nut 36, a small diameter portion 36a located on the upper side (the first portion 11 side) and a large diameter portion 36b located on the lower side (the grip member 20 side) are formed.

[0050] The inner diameter D7 of the small diameter portion 36a is set smaller than the outer diameter D5 of the flange portion 34. The inner diameter D8 of the large diameter portion 36b is set larger than the outer diameter D5 of the flange portion 34. A step portion 36c is formed between the small diameter portion 36a and the large diameter portion 36b. The length L4 of the large diameter portion 36b in the vertical direction is larger than the thickness L5 of the flange portion 34.

[0051] The internal thread portion 36d is provided on the inner diameter side of the nut 36. More specifically, the internal thread portion 36d is provided on the lower end side of the large diameter portion 36b and is provided in a region obtained by subtracting the thickness L5 of the flange portion from the length L4 of the large diameter portion 36b.

[0052] like Figure 3 As shown, in this embodiment, after the nut 36 is inserted through the first part 11, the arm side connection part 31 inserts the fixing part 33 of the connection member 32 into the fixing hole part 11c and fixes it, and the connection protrusion 35 protrudes from the base end part 11a of the first part 11 toward the grip member 20 (below). In other words, the arm side connection part 31 includes the connection protrusion 35 protruding toward the grip side connection part 37 and the nut 36 having the internal thread part 36d on the inner surface, and the arm body 10 includes the arm side connection part 31.

[0053] Since the inner diameter D7 of the small diameter portion 36a of the nut 36 is smaller than the outer diameter D5 of the flange portion 34, the step portion 36c contacts the upper surface 34a of the flange portion 34. This prevents the nut 36 from falling off the first portion 11.

[0054] Since the length L4 of the large diameter portion 36b in the vertical direction is greater than the thickness L5 of the flange portion 34, when the step portion 36c of the nut 36 is in contact with the upper surface 34a of the flange portion 34, the lower side of the large diameter portion 36b of the nut 36 protrudes further toward the handle member 20 than the lower surface 34b of the flange portion 34. Since the internal thread portion 36d is provided on the lower end side of the large diameter portion 36b, it is configured so that the internal thread portion 36d can be screwed with the external thread portion 21f of the handle-side connecting portion 37.

[0055] like Figure 3 and Figure 4 As shown, the grip-side connection part 37 has a connection hole part 21b into which the connection protrusion 35 is inserted, and an external thread part 21f into which the nut 36 is screwed. The connection protrusion 35 is connected to the connection hole part 21b in a detachable manner (insertable and removable manner).

[0056] like Figure 3 and Figure 6 As shown, the connection hole 21b is formed on the inner diameter side of the upper end 21a of the grip core 21. The connection hole 21b is formed by enlarging the inner diameter of the grip core 21. The dimension d3 in the front-back direction and the dimension d4 in the width direction of the connection hole 21b are larger than the inner diameter D2 of the grip core 21.

[0057] It is preferred that the cross-sectional shape of the connecting hole portion 21b when viewed in the direction of the axis C1 of the grip core portion 21 has a corner. Figure 6 As shown, the corner portion includes the case where the corner portion is subjected to R processing or chamfering processing. The cross-sectional shape of the connecting hole portion 21b when viewed along the axis C1 is 180 degrees rotationally symmetrical around the axis C1 (a double symmetrical figure), and in this embodiment, has a rectangular shape. The connecting hole portion 21b has two short side surfaces 21c and two long side surfaces 21d.

[0058] like Figure 4 and Figure 6 As shown, the cross section S2 when viewed along the axis C1 direction of the connecting protrusion 35 has a shape complementary to the connecting hole 21b, and is a rectangular shape in this embodiment. Thus, the relative rotation of the connecting protrusion 35 with respect to the connecting hole 21b is restricted. Similar to the connecting hole 21b, the cross section S2 is preferably a shape with a corner, and more preferably a shape that is rotationally symmetrical at 180 degrees around the axis C1 (in other words, a doubly symmetrical figure, and further in other words, a 180-degree point symmetrical figure).

[0059] The dimensions of the connecting protrusion 35 in the front-to-back direction and the width direction are larger than the inner diameter D2 of the grip core 21, and are substantially consistent with the dimension d3 in the front-to-back direction and the dimension d4 in the width direction of the connecting hole 21b. The axial length L2 of the connecting protrusion 35 is set to be substantially consistent with the axial length of the connecting hole 21b. The connecting protrusion 35 is formed into a tapered shape with the side surface facing downward and inclined toward the axis C1 side. Thus, the connecting protrusion 35 is guided to be inserted into the connecting hole 21b.

[0060] The outer diameter D6 of the grip core 21 is set larger than the outer diameter D5 of the flange 34. When the connection protrusion 35 is inserted into the connection hole 21b, the flange 34 abuts against the end surface 21h of the grip core 21, thereby determining the insertion amount of the connection protrusion 35, and the flange 34 functions as a stopper for the connection member 32.

[0061] like Figure 3 and Figure 4As shown, the external thread portion 21f is formed on the outer diameter side of the upper end portion 21a of the grip core portion 21. The external thread portion 21f is screwed with the internal thread portion 36d of the nut 36 of the grip side coupling portion 37. After the coupling protrusion 35 is inserted into the coupling hole portion 21b, the nut 36 is screwed with the external thread portion 21f, thereby coupling the arm body 10 and the grip member 20.

[0062] The above structure provides the following effects.

[0063] (1) The support arm 1 of the massager 9 comprises: a columnar arm body 10 on which the massager 9 is mounted; and a columnar handle member 20 which is gripped by a user and has a handle side connection portion 37 which is detachably connected to an arm side connection portion 31 located at an end portion of one side of the arm body 10, the arm side connection portion 31 having a connection protrusion 35 protruding toward the handle side connection portion 37, and a nut 36, the handle side connection portion 37 having a connection hole portion 21b into which the connection protrusion 35 is inserted to limit the relative rotation between the arm side connection portion 31 and the handle side connection portion 37, and an external thread portion 21f which is threadedly engaged with the nut 36.

[0064] According to one embodiment of the present invention, the relative rotation between the arm body 10 and the handle member 20 can be restricted by the connection protrusion 35 and the connection hole 21b, and the arm body 10 and the handle member 20 can be connected by the external thread 21f and the internal thread 36d of the nut 36. Since the relative rotation between the arm body 10 and the handle member 20 is restricted, the looseness between the arm-side connection part 31 and the handle-side connection part 37 can be suppressed.

[0065] (2) The arm body 10 includes: a first portion 11 extending from the arm-side connecting portion 31 toward the side opposite to the grip member 20; and a second portion 13 connected to the upper end portion 11b of the first portion 11 via the first curved portion 12 and extending obliquely relative to the axis C1 of the grip member 20, with the massager 9 mounted on the front end portion 13a.

[0066] According to this structure, Figure 2 As shown, the handle part 20 can be held with the first part 11 located on the front side of the user and the second part 13 located on the back side of the user. Therefore, it is easy to press the massager 9 installed on the front end part 13a of the second part 13 against the massaged part on the back side of the user, such as the shoulder, waist, etc.

[0067] like Figure 2As shown in FIG. 1 , since the axis C1 of the handle member 20 intersects the axis C4 of the second portion 13 and the massager 9 is mounted on the front end portion 13a of the second portion 13, the massager 9 is separated from the axis C1 of the handle member 20. Therefore, for example, in addition to the case where the axis C4 of the second portion 13 is directed downward, Figure 7 As shown, due to the gravity acting on the massager 9, a moment tending to rotate the second portion 13 around the axis C1 of the handle member 20 is applied (see Figure 7 Arrow A).

[0068] As a result, due to the rotation of the second part 13 around the axis C1, looseness may occur between the handle part 20 and the arm body 10 when the two are directly screwed together, but the relative rotation between the handle part 20 and the arm body 10 is limited by the connecting protrusion 35 and the connecting hole part 21b, thereby suppressing the looseness between the handle part 20 and the arm body 10.

[0069] (3) The cross section S2 of the connecting protrusion 35 when viewed along the axis C1 of the handle member 20 is rotationally symmetrical at 180 degrees or 360 degrees about the axis C1 of the handle member 20, so that the connecting direction of the handle member 20 with respect to the arm body 10 can be specified in two directions or less. For example, when the housing 22 of the handle member 20 is formed of a split structure and has a parting line PL, the direction of the parting line PL with respect to the arm body 10 can be specified.

[0070] (4) The grip member 20 has the parting line PL formed by the mating surfaces between the first housing 22 a and the second housing 22 b which are divided along the direction in which the axis C1 of the grip member 20 extends.

[0071] According to this structure, since the posture of the grip member 20 relative to the arm body 10 around the axis C1 is specified, the position of the parting line PL of the grip member 20 can be controlled. Figure 1 As shown, by arranging the parting line PL in the front-rear direction of the grip member 20, when the support arm 1 is placed in a manner not held by the user, one side ( Figure 1 When the support arm 1 is placed with the housing 22 facing upward, the parting line PL can be suppressed from appearing on the upper side. Therefore, even when the housing 22 is a split structure with good manufacturing efficiency, the aesthetics of the support arm 1 can be improved.

[0072] (5) Since the cross section S2 of the connecting protrusion 35 is a rectangular shape, it is easier to restrict the relative rotation between the arm body 10 and the grip member 20 .

[0073] In the present embodiment, the cross section S2 of the connecting protrusion 35 is a rectangular structure, but the present invention is not limited thereto. For example, the cross section of the connecting protrusion 35 may be as follows: Figure 8 As shown in (a), it is a square (four-fold symmetry, 90-degree point symmetry), or it can be Figure 8 As shown in (b), it is a trapezoidal shape (single-fold symmetry, 360-degree point symmetry), or it can be Figure 8 As shown in (c), it is a hexagon (six-fold symmetry, 60-degree point symmetry), and it can also be Figure 8 As shown in (d) of FIG. 1 , the connecting protrusion 35 is in a D shape (single-fold symmetry, 360-degree point symmetry). According to this structure, by minimizing the corners, wear of the connecting parts can be suppressed, and relative rotation between the arm body 10 and the grip member 20 can be restricted. In addition, the cross section of the connecting protrusion 35 can be as follows: Figure 8 As shown in (e), it is WD-shaped (a shape in which two opposite sides of a rectangular shape are bent into arcs, a two-fold symmetry, a 180-degree point symmetry figure) or it can be Figure 8 As shown in (f), it is an equilateral triangle (threefold symmetry, 120-degree point symmetry), or it can be Figure 8 As shown in (g), it is an isosceles triangle shape (single-fold symmetry, 360-degree point symmetry figure).

[0074] In this embodiment, the arm-side connecting portion 31 is provided with the connecting protrusion 35 and the nut 36, and the grip-side connecting portion 37 is provided with the connecting hole portion 21b and the external thread portion 21f, but the present invention is not limited thereto. Fig. 9 As shown, the connection structure 130 may also include a nut 136 having a connection hole 111c and an internal thread 136d at the arm-side connection portion 131, and a connection protrusion 133 and an external thread 121f at the handle-side connection portion 137. In this case, the connection portion 135 of the connection member 132 may also be fixed to the connection hole 121b provided at the front end 121a of the handle core 121. In addition, although not shown in the figure, as another embodiment, the arm-side connection portion may include a connection hole and an external thread, and the handle-side connection portion may include a connection protrusion and a nut, or, as another embodiment, the arm-side connection portion may include a connection protrusion and an external thread, and the handle-side connection portion may include a connection hole and a nut.

[0075] In the present embodiment, an example in which the connection member 32 is formed of a member different from the arm body 10 has been described, but the connection member 32 may be formed integrally with the arm body 10 .

[0076] It should be noted that the present invention is not limited to the configurations described in the above-mentioned embodiments, and various modifications can be made.

Claims

1. A support arm of a massager, characterized in that: have: A columnar arm body for mounting the massager; and A columnar handle member is gripped by a user and has a handle-side connection portion that is detachably connected to an arm-side connection portion located at an end portion of one side of the arm body. One of the arm-side connecting portion and the handle-side connecting portion has a connecting protrusion that protrudes toward the other of the arm-side connecting portion and the handle-side connecting portion. The other of the arm-side connecting portion and the handle-side connecting portion has a connecting hole portion into which the connecting protrusion is inserted to restrict relative rotation between the arm body and the handle member. One of the arm-side connection portion and the grip-side connection portion includes a nut and an external thread portion threadedly engaged with the nut. The other of the arm-side connecting portion and the grip-side connecting portion includes the other of the nut and the external thread portion.

2. The support arm of the massager according to claim 1, characterized in that: The arm body comprises: a first portion extending from the arm side connection portion toward a side opposite to the handle member; and a second portion continuous with an upper end portion of the first portion via a bent portion and extending obliquely relative to an axis of the handle member, the massager being mounted at a front end portion of the second portion.

3. The support arm of the massager according to claim 1 or 2, characterized in that: A cross section of the connecting protrusion when viewed along the axial direction of the handle member is rotationally symmetrical at 180 degrees or 360 degrees around the axis of the handle member.

4. The support arm of the massager according to claim 3, characterized in that: The handle member has a parting line formed by a mating surface between a first shell and a second shell divided along a direction in which an axis of the handle member extends.

5. The support arm of the massager according to claim 1 or 2, characterized in that: The cross section of the connecting protrusion is rectangular.

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