Pressing type treatment tool

Abstract

To improve a changeover mechanism in a pressing type treatment tool.SOLUTION: A changeover mechanism includes one or more spherical bodies, a spherical body holding part provided in a body part to hold the one or more spherical bodies, and a changeover member held by the body part relatively movably in an axial direction on outer peripheral side of the spherical body holding part. The changeover member is moved between a first position for suppressing movement in a radial outward direction of the one or more spherical bodies and holding an engagement state in which the one or more spherical bodies held by the spherical body holding part are engaged with a recessed part of a collision axis and a second position for allowing the movement in the radial outward direction of the one or more spherical bodies and allowing changeover from the engagement state to a non-engagement state. This can switch the changeover mechanism between the a movement suppression state and a movement allowance state. In this way, the dimensions in a radial direction of a pressing type treatment tool can be reduced because a spring extending in the radial direction becomes unnecessary.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a pressure-type treatment device that applies pressure to a target part of the body to provide treatment. [Background technology]

[0002] Patent document 1 describes a pressure-type treatment device that includes: (a) a main body portion extending in the axial direction; (b) a pressure shaft that is held on the main body portion so as to be movable relative to the main body portion in the axial direction and has a contact portion that can come into contact with the treatment area of ​​the subject; (c) a collision shaft that is held behind the pressure shaft across a gap so as to be movable relative to the main body portion in the axial direction; and (d) a switching mechanism that is provided between the main body portion and the collision shaft and is switchable between a movement-permitting state that allows relative movement of the collision shaft with respect to the main body portion and a movement-suppressing state that suppresses relative movement.

[0003] In the pressure-type treatment device described in Patent Document 1, the switching mechanism includes (i) a plurality of balls, (ii) a plurality of radial holes formed in the main body and extending in the radial direction, and (iii) a spring disposed in each of the radial holes and pressing each of the plurality of balls toward a recess formed on the outer circumferential surface of the impact shaft. When a forward force is applied to the impact shaft and the radially outward force applied via the balls exceeds the set load of the springs, the balls are permitted to move radially outward. The switching mechanism is switched from a movement-suppressing state to a movement-permitting state, allowing relative axial movement of the impact shaft with respect to the main body. The impact shaft collides with the pressing shaft, and a pressing force is applied to the treatment site of the subject via the pressing shaft. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6101893 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0005] An object of the present invention is to improve the switching mechanism in a pressure-type treatment device.

[0006] In the pressure-type treatment device according to the present invention, the switching mechanism includes (i) one or more spherical bodies, (ii) a spherical body holding portion provided on the main body portion and holding the one or more spherical bodies so that they can move radially, and (iii) a switching member held on the outer periphery of the spherical body holding portion so that they can move axially relative to the main body. The switching member is moved between a first position where it suppresses the radially outward movement of the one or more spherical bodies, thereby maintaining an engaged state in which the one or more spherical bodies held in the spherical body holding portion engage with recesses provided on the outer periphery of the collision shaft, and a second position where it allows the radially outward movement of the one or more spherical bodies, thereby allowing switching from the engaged state to a disengaged state in which the one or more spherical bodies do not engage with the recesses, thereby switching the switching mechanism between a movement suppressing state and a movement allowing state.

[0007] In this way, the pressure-type treatment device according to the present invention does not require a spring extending in the radial direction that is provided to correspond to the spherical body, and as a result, the radial dimension of the pressure-type treatment device can be reduced. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram showing the entire pressure-type medical treatment device according to Example 1 of the present invention. [Figure 2] FIG. 3 is a cross-sectional view of the pressure-type treatment device. [Figure 3] 1A and 1B are diagrams showing the operating state of the pressure-type treatment device, (a) a diagram showing a state in which the tip of the pressure shaft is pressed against a target part of a human body, (b) a diagram showing a state in which a force F is applied to the grip part, and (c) a diagram showing a state in which a pressure force is applied to the target part. [Figure 4] 4A and 4B are diagrams showing the operating states of the switching mechanism of the pressure type treatment tool corresponding to the operating states of Fig. 3. (a) and (b) are diagrams showing a movement inhibiting state, and (c) is a diagram showing a movement allowing state. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, a pressure-type treatment device according to one embodiment of the present invention will be described in detail with reference to the drawings. [Example]

[0010] 1 and 2, the pressure-type treatment tool extends generally in a direction parallel to an axis L (hereinafter simply referred to as the axial direction). The pressure-type treatment tool includes a main body 10, a pressure shaft 12, a collision shaft 14, a grip part 16, a switching mechanism 18, etc.

[0011] The pressing shaft 12 is held by the main body 10 so as to be relatively movable in the axial direction. The pressing shaft 12 includes a pressing shaft main body 12h, a contact portion 12s, a flange portion 12f, etc. The contact portion 12s is provided at the front end of the pressing shaft main body 12h and is capable of contacting the target part of the body of the user (person). The flange portion 12f is provided at the middle portion of the pressing shaft main body 12h.

[0012] The collision shaft 14 is held behind the pressing shaft 12 with a gap a separated therefrom and movable relative to the main body 10 in the axial direction. The collision shaft 14 generally has a stepped shape and includes a small diameter portion 14a, a large diameter portion 14b, a flange portion 14f, etc. The small diameter portion 14a is located at the front end of the collision shaft 14. The large diameter portion 14b has a larger diameter than the small diameter portion 14a and is located behind the small diameter portion 14a. The flange portion 14f is provided at the rear of the large diameter portion 14b. A key groove 14k extending in the axial direction is provided on the outer periphery of the large diameter portion 14b, and a spherical body holding portion (sometimes referred to as a shaft-side spherical body holding portion) 14d is provided. A plurality of recesses serving as the spherical body holding portion 14d are provided in an annular shape with gaps between them.

[0013] The main body 10 has a cylindrical shape that extends in the axial direction, and includes a front portion 20, a rear portion 22, an auxiliary grip 24, etc. The auxiliary grip 24 is provided on the rear portion 22.

[0014] An axially extending through-hole 30 is provided in the front part 20 of the main body 10. The through-hole 30 has a stepped shape and includes a small diameter hole portion 30a located on the front side and a large diameter hole portion 30b located on the rear side.

[0015] The pressing shaft 12 is disposed in the through-hole 30 of the front portion 20. The middle portion of the pressing shaft main body 12h is located in the small diameter hole portion 30a, and the front portion including the contact portion 12s protrudes from the small diameter hole portion 30a. In addition, the portion of the pressing shaft main body 12h rearward of the flange portion 12f is located in the large diameter hole portion 30b.

[0016] The forward end position of the pressing shaft 12 is determined by the front end surface of the flange portion 12f abutting against the step surface 30s between the small diameter hole portion 30a and the large diameter hole portion 30b. The retracted end position of the pressing shaft 12 is determined by the rear end surface 12b of the pressing shaft 12 abutting against the front end surface 22f of the rear portion 22 of the main body portion 10. In this way, the front end surface 22f and the step surface 30s of the main body portion 10 function as stoppers that determine the retracted end position and forward end position of the pressing shaft 12. A spring 32 is provided between the flange portion 12f of the pressing shaft 12 and the front end surface 22f of the main body portion 10. The spring 32 applies a forward elastic force to the pressing portion 12.

[0017] A through-hole 40 extending in the axial direction is provided in the rear portion 22 of the main body 10. The through-hole 40 has a stepped shape and includes a small diameter hole portion 40p, an intermediate hole portion 40m, and a large diameter hole portion 40b. The small diameter hole portion 40p is an opening portion of the front end portion 22a. The small diameter hole portion 40p, the intermediate hole portion 40m, and the large diameter hole portion 40b have increasing diameters in this order and are located in order from the front.

[0018] The rear portion 22 of the main body 10 is connected and fixed to the front portion 20 at a front end portion 22a. A front end surface 22f of the front end portion 22a faces the large diameter hole portion 30b of the through hole 30 in the front portion 20. Furthermore, the through hole 40 in the rear portion 22 and the through hole 30 in the front portion 20 are communicated with each other via an opening portion 40p in the front end portion 22a.

[0019] The impact shaft 14 is disposed in the through-hole 40 of the rear portion 22. The small diameter portion 14a of the impact shaft 14 is located in the opening 40p of the front end portion 22f. When this pressure-type treatment device is in a non-operating state, the front end surface 14g of the impact shaft 14 faces the rear end surface 12b of the pressing shaft 12 across an axial gap a. The large diameter portion 14b of the impact shaft 14 is located in the intermediate hole portion 40m and the large diameter hole portion 40b. A bolt 22k serving as a key provided in the rear portion 22 of the main body 10 is engaged with the key groove 14k of the impact shaft 14. This restricts relative rotation of the impact shaft 14 around the axis L with respect to the main body 10, preventing the impact shaft 14 from coming loose.

[0020] The switching mechanism 18 is switchable between a movement suppressing state in which relative axial movement of the collision shaft 14 with respect to the main body 10 is suppressed, and a movement allowing state in which relative movement is permitted. The switching mechanism 18 is provided on the outer circumferential side of the large diameter portion 14b of the collision shaft 14 inside the through-hole 40. As shown in FIGS. 2-4 , the switching mechanism 18 includes a plurality of spherical bodies 50 as one or more spherical bodies, a spherical body holding member 52, a switching member 54, etc.

[0021] The spherical body holding member 52 has a generally cylindrical shape extending in the axial direction and is fixed to the rear portion 22 of the main body 10. Therefore, the spherical body holding member 52 can be referred to as a spherical body holding portion 52, which is part of the main body 10. The spherical body holding portion 52 has a stepped shape and includes a small diameter portion 52a, a large diameter portion 52b, and a spherical body holding hole 52s. The small diameter portion 52a is provided in the front portion of the spherical body holding portion 52, and the large diameter portion 52b, which is larger in diameter than the small diameter portion 52a, is provided in the rear portion. The spherical body holding hole 52s is a radial hole that penetrates the small diameter portion 52a in the radial direction, and multiple spherical body holding holes 52s are provided in an annular shape with intervals between them. The spherical body holding hole 52s holds the spherical body 50 so that it cannot move relative to the main body 10 in the axial direction but can move relative to the main body 10 in the radial direction.

[0022] The bolt 22k described above is threadedly engaged with the rear portion 22 of the main body 10 and / or the small diameter portion 52a of the spherical body holder 52, with its tip protruding toward the inner periphery of the spherical body holder 52 and reaching the key groove 14k of the impact shaft 14. The bolt 22k functions as a key and also functions to fix the spherical body holder 52 to the main body 10.

[0023] The switching member 54 has a cylindrical shape that extends in the axial direction and is located on the outer periphery of the spherical body holding portion 52. The switching member 54 has a shape in which a front portion 54h protrudes radially inward more than a rear portion 54b. The convex portion 54h, which is the front portion, is located on the outer periphery of the small diameter portion 52a of the spherical body holding portion 52, and the main portion 54b of the switching member 54, which is the rear portion, is located on the outer periphery of the large diameter portion 52b. A return spring 56 that applies a rearward elastic force to the switching member 54 is provided between the front end surface of the convex portion 54h and the main portion 10 (the step surface between the intermediate hole portion 40m and the large diameter hole portion 40b).

[0024] The protrusion 54h has a generally trapezoidal cross section. An inclined surface 54p inclined with respect to the axial direction is provided at the rear of the protrusion 54h. The inclined surface 54p is inclined radially outward as it extends rearward. The innermost protruding portion of the protrusion 54h is an opposing surface 54q parallel to the axis L. In contrast, the recess 14d of the collision shaft 14 is provided with an inclined surface 14p inclined with respect to the axial direction.

[0025] As shown in Figures 4(a) and (b), when the switching mechanism 18 is in the movement suppressed state, the multiple spherical bodies 50 are held in the spherical body holding holes 52s and are engaged with the recesses 14d of the collision shaft 14. The switching member 54 is in the first position, and the convex portions 54h are located radially outward of the multiple spherical bodies 50. The opposing surfaces 54p of the convex portions 54h are in contact with the spherical bodies 50 radially outward. The spherical bodies 50 are suppressed from moving radially outward, maintaining the engaged state. Furthermore, relative axial movement of the collision shaft 14 with respect to the main body 10 is suppressed.

[0026] 4(c), when the switching member 54 is advanced and reaches a second position where the protrusion 54h disengages from the spherical bodies 50, the spherical bodies 50 are permitted to move radially outward. As the collision shaft 14 moves axially, the spherical bodies 50 are moved radially outward along the inclined surface 14p of the recess 14d and come out of the recess 14d. The spherical bodies 50 enter a disengaged state where they do not engage with the recess 14d. As a result, the switching mechanism 18 is switched to the movement-permitting state, and the collision shaft 14 is permitted to move axially relative to the main body 10.

[0027] The grip portion 16 applies an axial force to the impact shaft 14. The grip portion 16 includes a grip 60 and a grip holding portion 62 having a generally cylindrical shape extending in the axial direction. The grip holding portion 62 holds the grip 60 and is held on the rear portion 22 of the main body 10 so as to be relatively movable in the axial direction. The grip holding portion 62 includes a grip holding body 64 and an adjustment member 68. The grip holding body 64 and the adjustment member 68 each have a cylindrical shape extending in the axial direction, and the grip holding body 64 and the adjustment member 68 are provided overlapping in the radial direction.

[0028] The grip holder 64 has a stepped shape and includes a small-diameter portion 64a at the front and a large-diameter portion 64b at the rear. The grip holder 64 is attached to the grip 60 at the large-diameter portion 64b. A bottomed recess 70 is formed by attaching the cylindrical grip holder 64 to the grip 60. The recess 70 communicates with the through-hole 40. The flange portion 14f of the impact shaft 14 is located inside the recess 70, and a spring 74 is provided between the rear end surface of the flange portion 14f and the bottom surface of the recess 70 of the grip portion 16. The spring 74 applies a forward elastic force to the impact shaft 14.

[0029] The small diameter portion 64a of the grip holder 64 is inserted into the through-hole 40 in the rear portion 22 of the main body 10 on the outer periphery side of the collision shaft 14. In addition, a return spring 76 is provided between the front end surface of the small diameter portion 64a of the grip holder 64 and the main body 10 (the rear end surface of the spherical body holder 52). The return spring 76 applies a rearward elastic force to the grip holder 64.

[0030] The adjustment member 68 is used to adjust the timing at which the switching mechanism 18 is switched from a movement-restricted state to a movement-permitted state. The adjustment member 68 has a stepped shape and includes a front portion 68a which is a small-diameter portion and a rear portion 68b which is a large-diameter portion. The front portion 68a is located on the inner circumferential side of the through-hole 40 in the rear portion 22 of the main body 10. In the non-operating state (which can be called the initial state) of this pressure-type treatment device, the adjustment member 68 is located behind the switching member 54, separated by an axial gap t.

[0031] The adjustment member 68 has a rear portion 68b held in the large diameter portion 64b of the grip holder 64 via a screw mechanism 66. The screw mechanism 66 is provided between the outer periphery of the grip holder 64 and the inner periphery of the adjustment member 68, and the adjustment member 68 is located on the outer periphery side of the grip holder 64. The screw mechanism 66 makes it possible to adjust the relative position of the adjustment member 68 with respect to the grip holder 64 in the axial direction, and to adjust the size of the gap t.

[0032] The operation of the pressure type treatment tool configured as above will be explained with reference to Figure 2 and Figures 3(a)-(c). The pressure type treatment tool is initially in the state shown in Figure 2.

[0033] As shown in Figure 3(a), the tip surface 12s of the pressing shaft 12 is brought into contact with the target part (treatment part) H of the body of the person (practitioner). As a result, the pressing shaft 12 retreats relatively to the main body 10, and the flange part 12f moves away from the step surface 30s against the elastic force of the spring 32. The switching member 54 is in a first position where the convex part 54h is located on the outer circumferential side of the plurality of spherical bodies 50, and the switching mechanism 18 is in a movement inhibited state.

[0034] As shown in Figure 3(b), in this state, a force F is applied to the grip portion 16 in the forward direction. The grip portion 16 is moved forward relative to the main body 10 and the impact shaft 14. This increases the elastic force of the spring 74. In addition, the grip holding portion 62 is moved forward against the elastic force of the return spring 76, and the gap t between the adjustment member 68 and the switching member 54 becomes smaller.

[0035] As shown in FIG. 3(c), when the force F increases, the adjustment member 68 abuts against the rear end surface of the switching member 54. The grip holding portion 62 is moved further forward against the elastic force of the return springs 76, 56, and the switching member 54 is moved forward and moved to the second position. The protrusion 54h disengages from the spherical body 50, allowing the spherical body 50 to move radially outward. The switching mechanism 18 is switched from the movement-restricted state to the movement-allowed state, allowing the collision shaft 14 to move forward relative to the main body 10. The collision shaft 14 moves forward due to the elastic force of the spring 74 and collides with the pressing shaft 12. A large force is applied to the pressing shaft 12, and the target portion H is pressed with a large force.

[0036] Thereafter, the switching member 54 and the grip holder 64 are retracted by the return springs 56, 76, and the adjustment member 68 is also retracted. As the grip holder 64 is retracted, the cross section 64s of the small diameter portion 64a and the large diameter portion 64b abuts against the flange portion 14f of the collision shaft 14, and the collision shaft 14 is also retracted.

[0037] Additionally, as the switching member 54 and the collision shaft 14 retract, the spherical bodies 50 are moved radially inward and engage with the recesses 14d. Specifically, the spherical bodies 50 are moved radially inward by the inclined surfaces 54p of the protrusions 54h and then along the inclined surfaces 14p of the recesses 14d. When the opposing surfaces 54q reach the outer peripheries of the spherical bodies 50 and the recesses 14d of the collision shaft 14 reach the inner peripheries of the spherical bodies 50, the spherical bodies 50 engage with the recesses 14d. The switching member 54 reaches the first position, restricting the spherical bodies 50 from moving radially outward from the engaged state, and the switching mechanism 18 enters a restricted state. Similarly, a pressing force can be applied to the target portion H by applying force F to the grip 60 again.

[0038] In addition, in the initial state of the pressure-type treatment tool, the size of the gap t in the initial state can be adjusted by moving the adjustment member 68 in the axial direction while rotating it relative to the grip holder 64. This makes it possible to adjust the timing at which the switching mechanism 18 switches from the movement-suppressing state to the movement-permitting state and the size of the force applied to the pressing shaft 12.

[0039] In this embodiment, the pressing shaft 10 is advanced and retracted at a very high speed, so that treatment can be performed while easing the pain of the practitioner (person). Furthermore, the switching mechanism 18 does not include a spring extending in the radial direction. Therefore, the radial size of the pressure-type treatment tool can be reduced. As a result, the weight of the pressure-type treatment tool can be reduced and usability can be improved. Furthermore, in the pressure-type treatment tool described in Patent Document 1, multiple spherical bodies are provided, and a spring extending in the radial direction is provided corresponding to each of the multiple spherical bodies. In contrast, in the pressure-type treatment tool of this embodiment, it is not necessary to provide a spring corresponding to each of the multiple spherical bodies. As a result, the number of parts can be reduced, leading to cost reductions.

[0040] In addition, the present invention can be implemented in various forms with various modifications and improvements based on the knowledge of those skilled in the art. [Explanation of symbols]

[0041] 10: Main body 12: Pressing shaft 14: Collision shaft 14d: Recess 16: Grip portion 18: Switching mechanism 50: Spherical body 52: Spherical body holding portion 54: Switching member 54h: Convex portion 62: Grip holding portion 64: Grip holding body 66: Screw mechanism 68: Adjusting member Patentable invention

[0042] The following describes patentable inventions. (1) a main body portion extending in an axial direction; a pressing shaft that is held by the main body portion so as to be relatively movable in the axial direction and that has a contact portion that can come into contact with a target part of the body; a collision shaft held by the main body portion so as to be relatively movable in the axial direction behind the pressing shaft with a gap therebetween; a switching mechanism that is provided between the main body portion and the collision shaft and that is switchable between a movement suppressing state in which relative movement of the collision shaft with respect to the main body portion in the axial direction is suppressed and a movement allowing state in which the relative movement is allowed; When the switching mechanism is switched to the movement allowing state, the collision shaft moves forward with respect to the main body portion and collides with the pressing shaft, thereby applying a pressing force to the target portion. the impact shaft includes one or more recesses on the outer periphery; the switching mechanism includes: (a) one or more spherical bodies; (b) a spherical body holding portion provided on the main body portion and holding the one or more spherical bodies so as to be movable in the radial direction; and (c) a switching member held on the main body portion so as to be movable in the axial direction, on the outer circumferential side of the spherical body holding portion, between a first position at which the one or more spherical bodies held by the spherical body holding portion are held in an engaged state in which they are engaged with the one or more recesses of the collision shaft, and a second position at which the one or more spherical bodies are allowed to move radially outward from the engaged state to a disengaged state in which they are not engaged with the one or more recesses, The pressure-type treatment device in which the switching mechanism is switched from the movement-suppressing state to the movement-permitting state by the switching member being moved from the first position to the second position.

[0043] (2) The pressure-type treatment device according to (1), wherein a return spring is provided between the switching member and the main body portion to apply an elastic force to the switching member toward the first position.

[0044] (3) The switching member includes a main body portion of the switching member and a protrusion portion provided to protrude inward from the main body portion of the switching member, A pressure-type treatment device as described in (1) or (2), wherein in the first position of the switching member, the convex portion is located on the outer periphery of the one or more spherical bodies, and in the second position, the convex portion is located away from the one or more spherical bodies.

[0045] (4) The spherical body holding portion includes a small diameter portion, a large diameter portion having a diameter larger than that of the small diameter portion, and one or more spherical body holding holes that are provided in the small diameter portion and penetrate the small diameter portion in the radial direction and are capable of holding the one or more spherical bodies, A pressure-type treatment device as described in item (3), in which the convex portion of the switching member is located on the outer periphery of the small diameter portion of the spherical body holding portion, and the main body portion of the switching member is located on the outer periphery of the large diameter portion of the spherical body holding portion.

[0046] (5) A pressure-type treatment device according to (3) or (4), in which an inclined surface inclined relative to the axial direction is provided on at least one of the rear part of the convex part of the switching member and the concave part of the collision shaft.

[0047] (6) The pressure-type treatment tool includes a grip portion that applies a forward force to the impact shaft, A pressure-type treatment device described in any one of items (1) to (5), wherein the grip portion includes a grip and a grip holding portion that holds the grip and is held in the main body portion so as to be relatively movable in the axial direction.

[0048] (7) The grip holding portion is generally cylindrical and is held on the inner circumferential side of the main body portion and the outer circumferential side of the collision shaft, with a gap in the axial direction behind the switching member, A pressure-type treatment device as described in (6), in which when a force in the forward direction is applied to the grip, the grip holding portion moves forward and abuts against the switching member, moving the switching member from the first position to the second position, thereby switching the switching mechanism from the movement-suppressing state to the movement-permitting state.

[0049] (8) The grip holding portion includes a grip holding body attached to the grip, and an adjustment member held by the grip holding body via a screw mechanism so as to be relatively movable in the axial direction, the adjustment member is located rearward of the switching member with a gap in the axial direction between the adjustment member and the switching member, The pressure-type treatment device according to item (6) or (7), wherein the gap is adjusted by adjusting the relative position of the adjustment member with respect to the grip holder in the axial direction.

[0050] (9) The grip holder includes a grip holder attached to the grip at its rear and held at its front on the inner periphery of the main body and on the outer periphery of the impact shaft so as to be relatively movable in the axial direction, A pressure-type treatment device described in any one of items (6) to (8), in which the grip holder is positioned opposite the spherical body holder and a return spring is provided between the grip holder and the spherical body holder.

[0051] (10) The grip holder includes a grip holder attached to the grip, and an adjustment member held by the grip holder via a screw mechanism so as to be movable in the axial direction, The grip holder and the adjustment member are provided overlapping each other in the radial direction, The pressure-type treatment device according to any one of items (6) to (9), wherein the grip holder faces the spherical body holder, and the adjustment member faces the switching member.

[0052] (11) The pressure-type treatment tool has a grip part that applies a force in a forward direction to the collision shaft, a spring provided between the grip portion and the impact shaft, the spring applying an elastic force to the impact shaft in the axial direction; The pressure-type treatment device according to any one of items (1) to (10), which includes:

Claims

1. a main body portion extending in an axial direction; a pressing shaft that is held by the main body portion so as to be relatively movable in the axial direction and that has a contact portion that can come into contact with a target part of the body; a collision shaft held by the main body portion so as to be relatively movable in the axial direction behind the pressing shaft with a gap therebetween; a switching mechanism that is provided between the main body portion and the collision shaft and that is switchable between a movement suppressing state in which relative movement of the collision shaft with respect to the main body portion in the axial direction is suppressed and a movement allowing state in which the relative movement is allowed; When the switching mechanism is switched to the movement allowing state, the collision shaft moves forward with respect to the main body portion and collides with the pressing shaft, thereby applying a pressing force to the target portion. the impact shaft includes one or more recesses on its outer periphery; the switching mechanism includes: (a) one or more spherical bodies; (b) a spherical body holding portion provided on the main body portion and holding the one or more spherical bodies so as to be movable in the radial direction; and (c) a switching member held on the main body portion so as to be movable in the axial direction, on the outer circumferential side of the spherical body holding portion, between a first position at which the one or more spherical bodies held by the spherical body holding portion are held in an engaged state in which they are engaged with the one or more recesses of the collision shaft, and a second position at which the one or more spherical bodies are allowed to move radially outward from the engaged state to a disengaged state in which they are not engaged with the one or more recesses, A pressure-type treatment device in which the switching member is moved relative to the main body from the first position to the second position, thereby switching the switching mechanism from the movement-suppressing state to the movement-permitting state.

2. the switching member includes a main body portion of the switching member and a protrusion portion protruding inward from the main body portion of the switching member, When the switching member is in the first position, the convex portion is located on an outer circumferential side of the one or more spherical bodies, and when the switching member is in the second position, the convex portion is located away from the one or more spherical bodies, 2. The pressure type treatment device according to claim 1, further comprising a return spring provided between the switching member and the main body portion, the return spring applying an elastic force to the switching member toward the first position.

3. the spherical body holding portion includes a small diameter portion, a large diameter portion having a diameter larger than the small diameter portion, and one or more spherical body holding holes that are provided in the small diameter portion and penetrate the small diameter portion in a radial direction and are capable of holding the one or more spherical bodies, 3. The pressure-type treatment device according to claim 2, wherein the convex portion of the switching member is located on the outer circumferential side of the small diameter portion of the spherical body holding portion, and the main body portion of the switching member is located on the outer circumferential side of the large diameter portion of the spherical body holding portion.

4. The pressure-type treatment tool includes a grip portion that applies a force in a forward direction to the collision shaft, The grip portion includes a grip and a grip holding portion that holds the grip and is held by the main body portion so as to be relatively movable in the axial direction, the grip holding portion is generally cylindrical, and is located on the inner circumferential side of the main body portion and the outer circumferential side of the impact shaft, rearward of the switching member with a gap in the axial direction, A pressure-type treatment device described in any one of claims 1 to 3, wherein when a force in the forward direction is applied to the grip, the grip holding portion moves forward and abuts against the switching member, moving the switching member from the first position to the second position, thereby switching the switching mechanism from the movement-suppressing state to the movement-allowing state.

5. the grip holder includes a grip holder attached to the grip, and an adjustment member held by the grip holder via a screw mechanism so as to be relatively movable in the axial direction, the adjustment member is located rearward of the switching member with a gap in the axial direction between the adjustment member and the switching member, 5. The pressure type medical treatment device according to claim 4, wherein the gap is adjusted by adjusting the relative position of the adjustment member with respect to the grip holder in the axial direction.

6. the grip holder includes a grip holder attached to the grip, and an adjustment member provided on the grip holder via a screw mechanism so as to be movable in the axial direction, The grip holder and the adjustment member are provided overlapping each other in the radial direction, the grip holder faces the spherical body holder, the adjustment member faces the switching member, 5. The pressure type medical treatment device according to claim 4, wherein a return spring is provided between the grip holder and the spherical body holder.

7. The pressure-type treatment tool is a grip portion that applies a force in a forward direction to the collision shaft; a spring provided between the grip portion and the impact shaft, the spring applying an elastic force to the impact shaft in the axial direction; The pressure-type treatment device according to any one of claims 1 to 3, comprising:

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