JP7350299B2 - Rotating support device and beauty device - Google Patents

Description

The present invention relates to a rotation support device and a beauty device equipped with the rotation support device.

2. Description of the Related Art Handheld beauty devices equipped with massage balls have been known. In such a beauty device, a ball is rotatably connected to a shaft attached to a handle, and beauty treatment is performed by moving the handle so that the ball rolls on the skin.

In Patent Document 1, one end of a support shaft 2 is fitted into a fitting hole of a spherical member 3 to rotatably support the annular member 3. Further, a massage instrument 100 is disclosed in which the other end of the support shaft 2 is fitted into a fitting hole formed in the main body 1 and is fixed to the main body 1 in a manner that cannot be removed. Note that the symbols are those described in Patent Document 1.

Further, in Patent Document 2, a rotating shaft 110 protruding from a shaft fixing part 112 of a main body part 10 is fitted into a roller body 20, and the roller body 20 is configured to be freely rotatable via a bearing 201. A roller 1 is disclosed. Note that the reference numerals are those described in Patent Document 2.

Further, Patent Document 3 discloses a beauty device 10 in which a cylindrical bearing member 19 is fitted to the protruding end of the ball support shaft 15, and the ball support shaft 15 is fixed with a stop ring 25 to prevent it from coming off. has been done. Note that the reference numerals are those described in Patent Document 3.

Japanese Patent Application Publication No. 2012-161517 International Publication 2014/054450 JP 2019-42597 Publication

However, in the above-mentioned beauty devices, the rotating shaft (shaft) connected to the handle is attached to the roller in a non-removable manner. ), it is necessary to prepare multiple beauty devices for each roller shape, and if the roller deteriorates over time, it is necessary to replace the beauty device as a whole, resulting in high costs. was there.

Therefore, a technical problem arises that must be solved in order to provide a rotation support device to which the shaft can be detachably attached and a beauty device equipped with the rotation support device.The present invention aims to solve this problem. With the goal.

In order to achieve the above object, a rotational support device according to the present invention is a rotational support device that rotatably supports a shaft, and includes a detachable support mechanism in which an insertion hole through which the shaft can be inserted and removed, and a detachable support mechanism. and a housing for accommodating a plurality of rolling elements capable of rolling on the outer circumferential surface of the shaft; an elastic member that allows movement away from the housing; and a retainer that is attached to the housing and includes an accommodating portion that holds the plurality of rolling elements at approximately equal intervals in the circumferential direction of the attachment/detachment support mechanism. , the shaft is formed with a raceway surface that accommodates the plurality of rolling elements, and a peak portion that is provided forward of the raceway surface in the insertion direction of the shaft and has a larger diameter than the raceway surface. , the elastic member is formed in a substantially C-shape with a notch formed in a portion in the circumferential direction, and the notch is engaged with a rotation stopper of the retainer.

According to this configuration, when the shaft is inserted into the insertion hole and the rolling elements move over the peak portion, the rolling elements move radially outward, but the elastic members are elastic so that they are pushed apart by the rolling elements. It deforms and urges the rolling element radially inward. When the rolling elements pass over the peak portion, the elastic member restores its original shape, and the rolling elements are accommodated in the raceway surface to rotationally support the shaft. In addition, when the shaft is pulled out and the rolling elements go over the peak part, the rolling elements move radially outward, but the elastic members are elastically deformed as if being pushed apart by the rolling elements, causing the rolling elements to radially move. Force inward in the direction. When the rolling elements pass over the peak portion, the elastic member returns to its original shape, and the shaft can be pulled out with a light force without resisting the biasing force of the elastic member. In this way, the attachment/detachment support mechanism can rotatably support the shaft so that it can be inserted and removed. Further, since the plurality of rolling elements held at approximately equal intervals by the retainer rotatably support the shaft in a well-balanced manner, the housing can be smoothly rotated with respect to the shaft. Furthermore, since the notch is engaged with the rotation stopper, the elastic member and the retainer are integrated, and the elastic member can be prevented from rotating with the rotation of the rolling elements.

Further, in the rotation support device according to the present invention, it is preferable that the elastic member is provided so as to surround the outer periphery of the plurality of rolling elements.

According to this configuration, since the plurality of rolling elements receive the biasing force of the elastic member substantially uniformly, the shaft can be rotationally supported in a well-balanced manner.

Further, in the rotation support device according to the present invention, it is preferable that the shaft has a tapered surface that gradually increases in diameter from the front in the insertion direction of the shaft to the peak portion.

According to this configuration, the biasing force with which the elastic member presses the rolling element against the shaft gradually increases according to the slope of the tapered surface, so that the user feels a gentle resistance when inserting the shaft into the insertion hole. Therefore, it is possible to prevent the shaft from being pushed in excessively and colliding with the housing.

Further, in the rotation support device according to the present invention, it is preferable that the shaft has a diameter that decreases discontinuously from the peak portion to the raceway surface.

According to this configuration, since a large pulling force is required for the rolling elements to overcome the peak portion and pull out the shaft, it is possible to prevent the shaft from being pulled out carelessly.

Further, in the rotation support device according to the present invention, it is preferable that the rolling element is made of resin.

According to this configuration, the rotation support device can be constructed without oil.

Further, the rotation support device according to the present invention includes a buffer member that is provided on the bottom surface of the accommodation hole that accommodates the detachable support mechanism so as to be able to come into contact with the tip of the shaft, and that buffers contact between the shaft and the housing. It is preferable to further include the following.

According to this configuration, the buffer member is disposed on the bottom surface of the housing hole at a position where it can come into contact with the shaft, thereby suppressing wear, collision noise, or sliding noise when the shaft and the housing come into contact with each other.

Further, in the rotation support device according to the present invention, it is preferable that the housing further includes a vent hole that communicates between the inside and outside of the accommodation hole that accommodates the attachment/detachment support mechanism.

According to this configuration, since the vent hole is formed, it is possible to reduce the noise generated when the shaft is pulled out from the attachment/detachment support mechanism.

Moreover, in order to achieve the above-mentioned subject, the beauty device concerning the present invention is provided with the above-mentioned rotational support device, a roller covered in the above-mentioned housing, and a handle connected to the above-mentioned shaft.

According to this configuration, the roller and handle that are integrated into the housing can be separated as desired.

According to the present invention, it is possible to provide a rotation support device including an attachment/detachment support mechanism capable of rotatably supporting a shaft so as to be freely inserted and removed.

FIG. 1 is a perspective view showing a beauty device according to an embodiment of the present invention. FIG. 3 is a perspective view showing the internal structure of the rotation support device. 3 is a front view showing the beauty device of FIG. 2. FIG. FIG. 2 is an exploded view of the beauty device shown in FIG. 1. The perspective view which shows the rotation support device which omitted the housing. A front view and a partially enlarged view showing the shaft. The perspective view which shows the housing seen from the front side. The perspective view which shows the housing seen from the rear side. FIG. 3 is a vertical cross-sectional view showing the housing. FIG. 3 is a perspective view showing an elastic member. FIG. 3 is a perspective view showing the retainer seen from the front side. FIG. 3 is a perspective view showing the retainer seen from the rear side. FIG. 12 is a front view of the retainer seen from A in FIG. 11; FIG. 3 is a schematic diagram showing how rolling elements slide on the circumferential surface of a shaft.

Embodiments of the present invention will be described based on the drawings. In addition, in the following, when referring to the number, numerical value, amount, range, etc. of constituent elements, the term is limited to that specific number, unless it is specifically specified or it is clearly limited to a specific number in principle. It doesn't matter if it's more than or less than a certain number.

In addition, when referring to the shape or positional relationship of constituent elements, etc., unless it is specifically specified or it is clearly considered that it is not the case in principle, etc., we refer to things that are substantially similar to or similar to the shape, etc. include.

Further, in the drawings, characteristic parts may be enlarged or exaggerated in order to make the features easier to understand, and the dimensional ratios of the constituent elements are not necessarily the same as in reality. Further, in the cross-sectional views, hatching of some components may be omitted in order to make the cross-sectional structure of the components easier to understand.

Note that in this embodiment, expressions indicating directions such as up and down and left and right are not absolute, and are appropriate when each component is in the orientation depicted in the drawing, but if the orientation changes. In some cases, the interpretation should be changed according to changes in posture.

FIG. 1 is a perspective view showing a beauty device 1 with a roller 2 cut in half. FIG. 2 is a perspective view showing the internal structure of the rotation support device 4. As shown in FIG. FIG. 3 is a front view showing the beauty device 1 shown in FIG. 2. FIG. 4 is an exploded view of the beauty device 1 shown in FIG. 1. FIG. 5 is a perspective view showing the rotation support device 4 with some members omitted.

The beauty device 1 includes a roller 2, a shaft 3, and a rotation support device 4. The beauty device 1 is a handy type beauty device. The user performs beauty treatment by grasping a handle (not shown) connected to the shaft 3 and moving the handle so as to cause the roller 2 to roll on the skin.

The roller 2 is formed into a substantially spherical shape. Note that in FIGS. 1 to 4, the roller 2 is shown cut along the insertion direction D1 in order to show the internal structure of the beauty device 1. Further, the roller 2 is not limited to a single member formed into a substantially spherical shape, but may be formed into a substantially spherical shape by combining two semispherical members, for example.

The roller 2 is made of resin, for example. Furthermore, the surface of the roller 2 may be plated with metal. Further, the surface of the roller 2 may have irregularities formed thereon. Inside the roller 2, an oval-shaped fixing hole 2a corresponding to a fixing portion 41f, which will be described later, is formed.

As shown in FIG. 6, the shaft 3 is formed into a substantially cylindrical shape. The rear end of the shaft 3 is connected to the handle of the beauty device 1.

The shaft 3 has a tapered surface 31 whose diameter increases from the front to the rear in the insertion direction D1, a flat peak portion 32 that continues from the tapered surface 31 and extends in the insertion direction D1 of the shaft 3, and a plurality of rotations described below. A track surface 33 that accommodates the moving body 44 is arranged in this order from the front in the insertion direction D1.

A curved guide portion 34 is provided at the tip of the shaft 3. The guide portion 34 functions as a guide when inserting the shaft 3 into an insertion hole 46a, which will be described later.

The rotation support device 4 includes a housing 41 and a detachable support mechanism 42.

7 to 9 are a perspective view and a longitudinal sectional view showing the housing 41. FIG. The housing 41 is made of resin, for example, and has a substantially cylindrical shape. The housing 41 is accommodated in the accommodation hole 2b of the roller 2. The housing 41 is configured to be non-slidable in the axial direction D2 by engaging the first retaining convex portion 41a formed on the outer periphery of the housing 41 with the first retaining recess 2c formed in the accommodation hole 2b. ing.

A substantially circular vent hole 41b is formed on the front side of the housing 41 in the insertion direction D1. The vent hole 41b is formed to communicate between the inside and outside of the housing 41.

A first accommodation hole 41c and a second accommodation hole 41d are provided in the center of the housing 41 in this order from the front to the rear in the insertion direction D1. The second accommodation hole 41d is formed to have a larger diameter than the first accommodation hole 41c.

The tip of the shaft 3 can be accommodated in the first accommodation hole 41c. A buffer member 43 is fitted into the bottom surface of the first accommodation hole 41c. The buffer member 43 is, for example, a rubber O-ring. The buffer member 43 suppresses the occurrence of wear, collision noise, or sliding noise when the shaft 3 and the housing 41 come into contact.

The detachable support mechanism 42 can be accommodated in the second accommodation hole 41d. A second retaining recess 41e is formed in the second accommodation hole 41d along the circumferential direction D3.

At the tip of the housing 41, an oval-shaped fixing portion 41f is provided upright when viewed from the side. The fixing portion 41f functions as a rotation stopper that prevents the housing 41 from rotating relative to the roller 2 by being fitted into the corresponding fixing hole 2a.

The attachment/detachment support mechanism 42 includes six rolling elements 44, an elastic member 45, and a retainer 46.

The rolling elements 44 are made of resin, but may also be made of metal or ceramic. The number of rolling elements 44 installed is not limited to six, and may be 2 to 5 or 7 or more.

FIG. 10 is a perspective view showing the elastic member 45. The elastic member 45 is provided so as to surround the six rolling elements 44, and urges the rolling elements 44 inward. The elastic member 45 is formed in a substantially C-shape, and includes a cutout portion 45a formed by cutting out a portion in the circumferential direction D3.

11 to 13 are a perspective view and a side view showing the retainer 46. FIG. The retainer 46 is made of resin, for example, and has a ring shape. An insertion hole 46a through which the shaft 3 can be inserted is formed in the center of the retainer 46. Further, on one surface of the retainer 46, a housing portion 46b and a rotation preventing portion 46c are provided.

Six housing portions 46b are provided according to the number of rolling elements 44, and are provided at approximately equal intervals in the circumferential direction D3. By housing the rolling elements 44 in the housing portion 46b, the rolling elements 44 are held at approximately equal intervals in the circumferential direction D3.

A width L1 on the inner diameter side of the housing portion 46b is set to be smaller than the diameter of the rolling element 44, and a width dimension L2 on the outer diameter side of the housing portion 46b is set to be greater than or equal to the diameter of the rolling element 44. Thereby, the rolling element 44 can contact the outer periphery of the shaft 3 without falling off from the inner diameter side of the housing part 46b, and can slightly slide inside the housing part 46b from the inner diameter side to the outer diameter side.

The rotation preventing portion 46c is provided upright from one surface of the retainer 46. The elastic member 45 and the retainer 46 are integrally formed by fitting the notch 45a into the rotation stopper 46c.

A second retaining convex portion 46d is formed on the outer peripheral surface of the retainer 46. By engaging the second retaining convex portion 46d with the second retaining recess 41e in the second accommodation hole 41d, the retainer 46 becomes unable to slide relative to the housing 41 in the axial direction D2 and in the circumferential direction D3. It is configured to be rotatable.

Next, the procedure for assembling the rotation support device 4 will be explained based on the drawings.

The rolling elements 44 are arranged one by one in the housing portion 46b of the retainer 46.

Next, the elastic member 45 is attached to the retainer 46 so as to surround the rolling element 44, and the attachment/detachment support mechanism 42 is assembled. At this time, by fitting the notch 45a into the rotation stopper 46c, the elastic member 45 and the retainer 46 are integrated, and the elastic member 45 is prevented from rotating with the rotation of the rolling elements 44. .

Next, the attachment/detachment support mechanism 42 is assembled into the second accommodation hole 41d of the housing 41. The retainer 46 is integrated into the housing 41 by snap-fitting the second retaining recess 41e of the housing 41 to the second retaining protrusion 46d of the retainer 46.

Further, the elastic member 45 is positioned so as to be sandwiched between the housing 41 and the retainer 46. Note that the buffer member 43 may be installed in the first housing hole 41c before the retainer 46 is installed in the housing 41, or it may be installed in the first housing hole 41c after the retainer 46 is installed in the housing 41. do not have.

Next, a procedure for attaching the shaft 3 to the attachment/detachment support mechanism 42 will be explained based on the drawings.

When the shaft 3 is inserted into the insertion hole 46a in the insertion direction D1, the rolling elements 44 come into contact with the tapered surface 31, as shown in FIG. 14(a), and then resist the urging force of the elastic member 45. while inserting the shaft 3.

Specifically, the rolling elements 44 are pushed and moved outward in the radial direction D4 perpendicular to the axial direction D2 as the shaft 3 is inserted. On the other hand, the elastic member 45 is elastically deformed so as to be spread apart by the rolling element 44, and urges the rolling element 44 inward in the radial direction D4.

In this way, by inserting the shaft 3 into the insertion hole 46a while resisting the biasing force of the elastic member 45 that gradually increases, the contact position between the rolling element 44 and the shaft 3 slides rearward in the insertion direction D1. .

When the shaft 3 is further inserted and the rolling elements 44 pass over the peak portion 32, the elastic member 45 is restored to its original shape, and the rolling elements 44 are accommodated in the raceway surface 33 as shown in FIG. 14(b). Ru. When the housing 41 rotates relative to the shaft 3, the rolling elements 44 roll on the raceway surface 33 along the circumferential direction D3.

The rolling elements 44 roll on the raceway surface 33 while sliding on the elastic member 45 . Therefore, by appropriately changing the material, thickness, etc. of the elastic member 45 and adjusting the biasing force, the manner in which the housing 41 rotates relative to the shaft 3 can be changed.

Next, a procedure for removing the shaft 3 from the attachment/detachment support mechanism 42 will be explained based on the drawings.

When trying to pull out the shaft 3 in the opposite direction to the insertion direction D1, the rolling elements 44 come into contact with the rear side surface of the peak portion 32, and then the shaft 3 is pulled out while resisting the biasing force of the elastic member 45.

Specifically, the rolling elements 44 are pushed and moved outward in the radial direction D4 as the shaft 3 is pulled out. On the other hand, the elastic member 45 is elastically deformed so as to be spread apart by the rolling element 44, and urges the rolling element 44 inward in the radial direction D4.

In this way, by pulling out the shaft 3 while resisting the rapidly increasing urging force of the elastic member 45, the contact position between the rolling element 44 and the shaft 3 slides forward in the insertion direction D1.

When the shaft 3 is further pulled out and the rolling elements 44 overcome the peak portion 32 as shown in FIG. 14(c), the elastic member 45 returns to its original shape and resists the urging force of the elastic member 45. The shaft 3 can be pulled out with light force. Note that by forming the vent hole 41b, the noise generated when the shaft 3 is pulled out is reduced.

Note that by appropriately changing the material, thickness, etc. of the elastic member 45, the force required when inserting and withdrawing the shaft 3 can be adjusted.

Furthermore, the timing at which the biasing force increases can be adjusted by adjusting the slope of the tapered surface 31.

In order to prevent the shaft 3 from being pulled out carelessly, the diameter is reduced discontinuously from the peak portion 32 to the raceway surface 33 as described above, that is, the rear end of the peak portion 32 is cut off in parallel along the radial direction D4. Although it is preferable to form the peak portion 32 in such a manner, the rear end of the peak portion 32 may be formed so as to be rounded outward.

In this manner, in the beauty device 1 according to the present embodiment, the shaft 3 can be attached to the attachment/detachment support mechanism 42 in a freely insertable/removable manner, and thus the roller 2 can be arbitrarily removed from the handle. This makes it possible to attach rollers 2 of different shapes to the handle as desired, or to remove a roller 2 that has deteriorated over time and replace it with a new roller 2.

Furthermore, the present invention can be modified in various ways other than those described above without departing from the spirit of the invention, and it goes without saying that the present invention extends to such modifications.

1...Beauty device 2...Roller 2a...Fixing hole 2b...Accommodating hole 2c...First retaining recess 3...Shaft 31...Tapered surface 32...Peak portion 33 ... Raceway surface 34 ... Guide part 4 ... Rotation support device 41 ... Housing 41a ... First retaining projection 41b ... Vent hole 41c ... First accommodation hole 41d. . . . Second accommodation hole 41e . . . Second retaining recess 41 f . . . Fixing portion 42 .
45a... Notch portion 46... Retainer 46a... Insertion hole 46b... Accommodating portion 46c... Rotation preventing portion 46d... Second retaining convex portion D1... Insertion direction

Claims (8)

A rotation support device that rotationally supports a shaft,
an attachment/detachment support mechanism formed with an insertion hole through which the shaft can be inserted and extracted;
a housing that accommodates the attachment/detachment support mechanism;
Equipped with
The attachment/detachment support mechanism is
a plurality of rolling elements that can roll on the outer peripheral surface of the shaft;
an elastic member that urges the rolling element toward the shaft and allows the rolling element to move away from the shaft;
a retainer that is attached to the housing and includes a housing section that holds the plurality of rolling elements at approximately equal intervals in a circumferential direction of the detachable support mechanism;
Equipped with
The shaft includes:
a raceway surface that accommodates the plurality of rolling elements;
a peak portion provided forward of the raceway surface in the insertion direction of the shaft and formed to have a larger diameter than the raceway surface;
is formed ,
The elastic member is formed in a substantially C-shape with a notch formed in a part in the circumferential direction,
The rotation support device , wherein the notch is engaged with a rotation stopper of the retainer . The rotation support device according to claim 1, wherein the elastic member is provided so as to surround the outer periphery of the plurality of rolling elements. 3. The rotation support device according to claim 1 , wherein the shaft has a tapered surface that gradually increases in diameter from the front in the insertion direction of the shaft to the peak portion. 4. The rotation support device according to claim 1 , wherein the shaft has a diameter that decreases discontinuously from the peak portion to the raceway surface. The rotation support device according to any one of claims 1 to 4 , wherein the rolling element is made of resin. The housing further includes a buffer member that is provided on the bottom surface of the accommodation hole that accommodates the attachment/detachment support mechanism so as to be able to come into contact with the tip of the shaft, and buffers contact between the shaft and the housing. The rotation support device according to any one of claims 1 to 5 . 7. The rotation support device according to claim 1, wherein the housing further includes a vent hole that communicates between the inside and outside of the accommodation hole that accommodates the attachment/detachment support mechanism. The rotation support device according to any one of claims 1 to 7 ;
a roller enclosed in the housing;
a handle connected to the shaft;
A beauty device characterized by:

Images