JP2720266B2 - Electromagnetic control spring clutch mechanism - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetically controlled spring clutch.
Regarding the mechanism. 2. Description of the Related Art Conventionally, an input rotary element driven to rotate.
Utilizing coil spring means to transmit the driving force of
An electromagnetically controlled spring clutch mechanism is used. This kind of
For example, Japanese Patent Application Laid-Open No.
There is one disclosed in JP 9-175633 A,
In such an electromagnetic control spring clutch mechanism, the input rotating element is fixed.
Shaft member with fixed and rotatable output rotary element
, A rotor that is integrally rotated with a shaft member, and a rotor
An armature assembly disposed on one side of
Armature facing one side of the
The mounting member and the armature are mounted on the rotor piece.
Including a biasing spring member biasing away from the surface
Resists the elastic biasing action of the amateur assembly and biasing spring member
Magnetically attracts the armature to one side of the rotor
Electromagnetic means, and one end is connected to the amateur assembly,
A coil spring means having the other end connected to the output rotary element
ing. In such a clutch mechanism, the electromagnetic means is eliminated.
When energized, the driving force of the input rotary element is output rotation
Not transmitted to the element, but when the electromagnetic means is energized
And the output rotating element are rotated relative to each other.
Thus, the coil spring means is contracted, thus requiring input rotation.
The elementary driving force is transmitted to the output rotary element. [0003] The above-described embodiment
It is not limited to the electromagnetic control spring clutch mechanism of
However, in the electromagnetically controlled spring clutch mechanism, the input rotation
When the frictional force between the element and the shaft
Driving force from the input rotary element even when the stage is deenergized
Is transmitted to the output rotating element, thereby
May rotate. [0004] The present invention has been made in view of the above points.
The main technical issue is the electromagnetically controlled spring clutch.
Mechanism, in particular a rotary drive in a predetermined direction and in a direction opposite to the predetermined direction.
Electromagnetic that transmits the driving force of the driven input rotary element to the output side
In the control spring clutch mechanism, the electromagnetic means is deenergized.
The output rotating element from rotating when
It is to stop. [0005] To achieve the above technical object
According to the present invention, a shaft part rotatably mounted
And a member which is rotatably mounted on the shaft member in a predetermined direction and at a predetermined position.
An input rotating element that is driven to rotate in a direction opposite to the fixed direction;
The input rotation element is disposed on one side and is rotated integrally with the shaft member.
A rotor to be tightened and an arm facing the rotor.
The armature in a direction away from the rotor
A biasing spring member that resiliently biases the biasing member when biased;
The armature is moved against the arm against the elastic biasing action of the spring member.
Electromagnetic means for magnetically attracting the input rotary element, and the input rotating element
By contracting when is rotating in a given direction
To transmit the driving force from the input rotary element to the shaft member
Spring clutch mechanism comprising:
And the other end of the input rotary element, which is integrated with the shaft member.
A rotor to be rotated, and a rotor positioned opposite to the rotor.
And an armature spaced from the rotor
A biasing spring member that resiliently biases in the direction,
The armature is biased against the elastic biasing action of the biasing spring member.
Electromagnetic means for magnetically attracting the rotor;
Contraction when the rolling element is rotating in the opposite direction
The driving force from the input rotary element is
Coil spring means for transmitting to the material
An electromagnetically controlled spring clutch machine having a spring clutch mechanism
Act on the shaft member to brake the rotation of the shaft member
Characterized by having a braking means for
A control spring clutch mechanism is provided. In the electromagnetically controlled spring clutch mechanism of the present invention,
The shaft member, which is an output rotating element, is
Therefore, the braking force to suppress the rotation at all times acts.
Have been. Therefore, when the electromagnetic means is deenergized,
To prevent the output rotating element from rotating.
And when it is de-energized after energizing the electromagnetic means
The output rotation element can be stopped instantaneously.
Wear. BRIEF DESCRIPTION OF THE DRAWINGS FIG.
One embodiment of the configured electromagnetic control spring clutch mechanism
Will be explained. In the illustrated embodiment, the predetermined direction and the direction opposite to the predetermined direction are shown.
The drive force of the input rotary element that is driven to rotate in the opposite direction is output.
The electromagnetic control spring clutch mechanism that can transmit to
It is an application of the invention. Referring mainly to FIG.
The illustrated electromagnetically controlled spring clutch mechanism shown includes a shaft member 4,
An input shaft such as a gear 6 rotatably mounted on the shaft member 4
Rolling element, the first spring clutch mechanism 8, the second spring clutch
And a brake mechanism 180 and a brake mechanism 180.
As shown in FIG. 1, the shaft member 4 includes, for example, a support base 12 and
14 and is rotatably mounted on the support base 12 of the shaft member 4.
Gear 14, a first spring clutch mechanism 8 and
And a second spring clutch mechanism 10. this
For example, the operating shaft 1 is connected to the shaft member 4 via the connecting means 16.
8 (indicated by a two-dot chain line in FIG. 1) are connected. Implementation
In the example, one end of the shaft member 4 penetrates the support base 12.
(A part of this protruding end is
20 is supported rotatably). Connection means 1
6 has a cylindrical connecting member 22. Connection member 22
Has a relatively large receiving recess 24a at one end thereof.
And a small-diameter end of the operating shaft 18 in the receiving recess 24a.
18a and screwing the fixing screw 26
Thus, the connecting member 22 and the operating shaft 18 are connected. Ma
The receiving recess 2 having a relatively small diameter is also provided at the other end of the connecting member 22.
4b (in the embodiment, the receiving recesses 24a and 24b are mutually
Communicating with the receiving recess 24.
b, the projecting end of the shaft member 4 is
The connection member 22 and the shaft member 4 are connected by screwing
Have been. Instead of fixing screws 26 and 28,
Both can be connected by a pin. Therefore, after
When the shaft member 4 is rotated as described above, the connection member 26
As a result, the operating shaft 18 is also rotated integrally with the shaft member 4. Next, referring to FIG. 2 together with FIG.
The spring clutch mechanism 8 and its related elements will be described.
I will tell. In the embodiment, the support base 12 of the shaft member 4 and the support base 12
A large diameter portion 4a is provided substantially at the center in the axial direction between
The gear 6 is rotatable around the large-diameter portion 4a.
The first between the gear 6 and one of the support bases 12 is mounted.
The spring clutch mechanism 8 is arranged, and the gear 6 and the other
A second spring clutch mechanism 10 described below between the support bases 14
Is arranged. The first spring clutch mechanism 8 shown in FIG.
30, amateur assembly 32, electromagnetic means 34 and carp
And a spring means 36. To explain further, electromagnetic hands
The step 34 supports one end of the shaft member 4, specifically, the shaft member 4.
It is arranged inside the base 12. Electromagnetic means shown
Reference numeral 34 denotes a field core 38 and the field core 38.
And the field core 38 has the electromagnetic coil 40 attached thereto.
Rotatably mounted on the shaft member 4 via the sleeve member 42
(See FIG. 1). On the outer peripheral surface of the field core 38
Is provided with a locking portion 44, and a notch 46 is formed in the locking portion 44.
Is formed. On the other hand, a part of the support base 12 is
The locking projection 48 is provided by bending it backward.
The locking projection 48 is notched in the locking portion 44.
(See FIG. 1). Therefore, the electromagnetic hand
The step 34 is rotated by rotation of a shaft member 4 described later.
Nothing. The electromagnetic means 34 of the shaft member 4 and the gear 6
Between the electromagnetic means 34, the rotor 30
And an amateur assembly 32 is provided. Specific examples
In this case, the rotor 30 and the armature assembly 32 are
Mounted on the boss member 50 as required,
The tuner assembly 32 and the first boss member 50 are unitized.
This constitutes a unit assembly. Referring also to FIG.
The first boss member 50 has one end (in FIGS. 1 to 3,
A small-diameter portion 52 provided at the left end portion and the other end portion (FIGS. 1 to 3).
A large diameter portion 54 provided at the right end in FIG.
And a middle diameter portion 56 provided at an intermediate portion. First
The small diameter portion 52 of the boss member 50 has a pair of pins defining a pin receiving portion.
The notch 58 is formed, and the notch 58
Attached to pin hole 60 (FIG. 2) formed through member 4
The both end portions of the pin member 62 are received. Also figure
The illustrated rotor 30 includes an annular base 64 and an outer portion of the annular base 64.
Annular portion 66 disposed on the side, an annular base portion 64 and an annular portion
66 are provided. Such rotor
The reference numeral 30 designates the annular base 64 as the small diameter portion 5 of the first boss member 50.
2 is fixed to one end thereof by press fitting.
It is rotated integrally with the boss member 50. In the embodiment, the rotor
30 is fixed to the small diameter portion 52 of the first boss member 50.
In relation to the inner peripheral edge of the annular base 64 of the rotor 30
Also, a pair of concave portions 70 are formed. Shaped on rotor 30
The formed recess 70 is formed in the first boss member 50.
The pin receiving portion is defined in cooperation with the cutout 58, and is expanded in FIG.
As shown largely, the pin member 62 mounted on the shaft member 4
Both ends are received in the notch 58 and the recess 70.
(Accordingly, the rotor 30 is connected to the small diameter portion of the first boss member 50.
52, the concave portion 70 of the rotor 30 and the small-diameter portion
The notches 58 of 52 are aligned and press-fitted). Structure
As a result, the rotor 30 and the first boss member 50 are reduced in size.
Even when the press-fit state of the diameter portion 52 is relatively weak,
Is securely integrated with the shaft member 4 via the pin member 62.
Rotated. Further, the amateur assembly 32 of the embodiment includes:
The armature 72, the support member 74 and the biasing spring member 76
Contains. The support member 74 is formed of a short cylindrical member.
And is rotatably mounted on the middle diameter portion 56 of the first boss member 50.
Have been. One end surface of the support member 74 (see FIGS. 1 to 4)
On the inner peripheral edge, an annular flange 78 is provided.
I have. This support member 74 is made of lightweight plastic.
It is preferred that Amateur 72 is a ring of rotor 30
Constructed from an annular plate having an outer diameter substantially the same as the outer diameter of the shaped portion 66
And mounted on the support member 74 via a biasing spring member 76.
Is being worn. More specifically, the biasing spring member 76 is supported.
It is attached to the annular flange 78 of the holding member 74,
The central portion 80 is fixed to one end surface of the support member 74 as described later.
Have been. The illustrated biasing spring member 76 is
A plurality of sickles extending outward (three in this example)
Of the plurality of protrusions 82
One end of the armature 72 (the surface facing the rotor 30)
On the opposite side) with a fixing member 84 such as a rivet.
Is defined. Therefore, one side of the rotor 30, that is, FIG.
The armature assembly 32 is disposed on the right side,
The spring member 76 connects the armature 72 to one side of the rotor 30,
In FIG. 1, it is elastically biased in a direction away from the right side.
Act to reduce As shown in the embodiment, the biasing spring member 76
Is preferably fixed to the support member 76 as follows.
No. The illustrated amateur assembly 32 further includes a plate
And a spring fixing member. The illustrated spring fixing member is
A ring substantially corresponding to the shape of the annular central portion 80 of the biasing spring member 76
It is composed of a plate member 86 in the shape of a letter. This play
Bend a part of the periphery of the member 86
At intervals in the circumferential direction (in the embodiment, 3
) Are provided. On the other hand, the bias spring
Each of the locking projections 88 is provided at an annular central portion 80 of the member 76.
(Three in this embodiment) rectangular insertion holes corresponding to
90 are formed, and the through hole 90 is formed in the support member 74.
A rectangular through hole 92 is formed corresponding to each of
You. Therefore, if it is biased against the annular flange 78 of the support member 74,
When the spring member 76 and the plate member 86 are attached,
Each locking projection 88 of the locking member 86 has a corresponding biasing spring member 7.
6 through the through hole 90 and the through hole 92 of the support member 74
The support member 74 projects to the other side (see the solid line in FIG. 5).
), The protruding end of the locking projection 88.
And lock it to the other end of the support member 74 as required.
The annular central portion of the biasing spring member 76 is
80 is fixed between the plate member 86 and the support member 74
You. Of the locking projection 88 of the plate member 86 in the embodiment.
The engagement with the support member 74 is performed as shown in FIG.
Preferably. That is, as shown in FIG.
1 through 3 (FIGS. 1 through 3 and FIG. 5).
The right end) to the right, and expand the
The deformed portion of the locking projection 88 is accommodated in the tension portion 92a.
It is preferred that the support
Member 74, biasing spring member 76 and plate member 86.
The size of the assembling element can be reduced. In addition, the example
When the extended portion 92a is provided in the through hole 92,
Pressing tool 9 such as a punch for deforming projection 88
4 is concave, and its distal end surface 94a defines an arcuate surface.
It is desirable to do so. By doing so, the figure
The locking projection 88 projected as shown by the solid line in FIG.
5 by the action of the pressurizing tool 94.
As shown in the figure, deform as required and insert the deformed part through hole
92 can be securely locked to the extended portion 92a.
You. In the unit assembly of the embodiment,
In addition, a plurality of support members 74 are provided on one end surface thereof at intervals in the circumferential direction.
(In the embodiment, three) projections 96 are provided.
The projection 96 is provided at the annular central portion 80 of the biasing spring member 76.
To define the protrusion receiving portions at circumferential intervals in accordance with
Several circular openings 98 are formed. Of each projection 96
The distal end portion passes through the opening 98 of the biasing spring member 76 and
Of the rotor 30 beyond the arm member 86 and the armature 72
Surface, the tip of which contacts one side of the rotor 30.
It is very close. In the embodiment, the protrusion 96 is
In connection with the extension as described above, the plate member 86
A semicircular notch 1 corresponding to the opening 98
00 is formed. As you can see, each protrusion
96 is received in the opening 98 and the notch 100,
The driving force is transmitted between the member 74 and the biasing spring member 76.
(In other words, the support member 74 and the biasing spring portion)
The asial load generated between the members 76, that is, the load in the rotational direction
And the first spring clamp as described later.
It functions to improve the responsiveness of the latch mechanism 8.
To further improve the responsiveness of the first spring clutch mechanism 8
As shown in the embodiment, the annular flange 7 of the support member 74 is
8 also includes the biasing spring member 76 and the plate member 86.
And contact the tip with one side of the rotor 30.
It is preferable to bring them close to each other.
96 and the tip of the annular flange 78 are the rotor 3
0 defines a substantially coplanar plane that is substantially parallel to one side
It is configured as follows. In the illustrated embodiment, the unit assembly
Press-fits the first boss member 50 to form the shaft member 4.
Is installed as required. In the embodiment, the shaft member 4
The required part 4b is processed like a knurl
The right end of the first boss member 50 is large at the portion 4b.
The first part is pressed into contact with the left end face of the diameter part 4a.
The shaft member 50 is rotated integrally with the shaft member 4. Referring again to FIG. 1 and FIG.
The surface (the left side in FIGS. 1 and 2) has an annular boss 1
02 is provided integrally, and a cylindrical
Two boss members 104 are mounted. In the example,
The second boss member 104 has an inner peripheral portion of the gear 6 (specifically,
Through hole 106 formed in boss 102)
(In the embodiment, two are formed).
By inserting a pair of protrusions 108 provided in
It is mounted so as to rotate integrally with the gear 6. this
The second boss member 104 faces the first boss member 50.
1 and 2 extend to the left. The second
Boss member 104 can be formed integrally with the gear 6
It is. The first boss member 50 and the second boss portion
The coil spring means 36 is fitted over the material 104
You. Large diameter portion 54 of first boss member 50 of the unit assembly
Extend toward the second boss member 104, and both boss members
The end faces of 50 and 104 are brought into contact with or close to each other.
ing. The outer diameter of the large diameter portion 54 of the first boss member 50
The outer diameter of the second boss member 104 is substantially equal to that of the second embodiment.
In this case, the coil spring means 36 is large in size of the first boss member 50.
Fitted over both the diameter portion 54 and the second boss member 104
Have been. In the embodiment, the coil spring means 36 is
1 and FIG.
Is rotated in the direction shown by arrow 110 (FIG. 2)
In addition, a force for preventing the rotation of the support member 74 acts on the
The holding member 74 is rotated relatively to the gear 6
And contracted direction). Such coil
One end 36a of the spring means 36 is formed at the other end of the support member 74.
Notches 112 (in the example, spaced in the circumferential direction)
Into one of the plurality of notches 112)
The other end 36b
Is a notch 11 formed in the annular boss portion 102 of the gear 6.
4 (In the example, four were formed at intervals in the circumferential direction.
By inserting it into one of the notches 114).
It is linked to As described above, the gear 6 is indicated by an arrow 11
When rotating in the direction indicated by 0, the electromagnetic means 34 is attached.
When energized, as will be described in detail later, the gear 6 and the amateur group
The three-dimensional body 32 is relatively rotated, so that the coil
The spring means 36 is contracted, so that the driving force from the gear 6 is
The second boss member 104, the coil spring means 36 and the first
Is transmitted to the shaft member 4 via the shaft member 50. Next, referring to FIG. 6 together with FIG.
Of the spring clutch mechanism 10 and its related elements
Will be explained. A second member disposed between the gear 6 and the support base 14;
Of the first spring clutch mechanism 8
Similarly, the rotor 116, the armature assembly 118,
A magnetic means 120 and a coil spring means 122;
The rotor 116 of the second spring clutch mechanism 10
Mature assembly 118, electromagnetic means 120 and coil spring
The structure of the means 122 is the same as that of the first spring clutch mechanism 8.
Rotor 30, armature assembly 32, electromagnetic means 34 and
And the configuration of the coil spring means 36 is substantially the same. Follow
The outline of the second spring clutch mechanism 10 will be described.
I do. Electromagnetic in the second spring clutch mechanism 10
The means 120 is the other end of the shaft member 4, more specifically,
The other end, more specifically, the inside of the support base 14 of the shaft member 4
Is placed in the second place. The electromagnetic means 120 shown in FIG.
Field core 120 and the field core 120
It has an electromagnetic coil 122 and the field core 120 is
Rotatably mounted on the shaft member 4 via the arm member 124
(See FIG. 1). On the outer peripheral surface of the field core 120
Is provided with a locking portion 126, and the locking portion 126 has a notch 1
28 are formed. On the other hand, the support base 14 has
The locking protrusion 130 is formed by bending a part backward.
Is provided, and the locking projection 130 is provided with the locking portion.
126 is locked in a notch 128. (See Figure 1
See). Therefore, the electromagnetic means 120 is provided for the shaft member 4 described later.
It is not rotated by rotation. The electromagnetic means 120 of the shaft member 4 and the gear 6
, The inside of the electromagnetic means 120, the rotor
116 and an amateur assembly 118 are provided.
In the embodiment, the rotor 116 and the armature assembly 1
18 is also mounted on the first boss member 132 as required.
116, amateur assembly 118 and first boss
The material 132 is unitized to form a unit assembly.
You. The first boss member 132 has one end (see FIGS. 1 and 6).
Large-diameter portion 134 provided at the left end portion and the other end portion.
(The small diameter portion 1 provided at the right end in FIGS. 1 and 6)
36, and a middle diameter portion 138 provided at an intermediate portion thereof.
ing. The small diameter portion 136 of the first boss member 132 has a pin
A pair of notches 140 that define the receiving portion are formed,
Others formed through the notch 140 through the shaft member 4
Pin member 114 mounted in one of the pin holes 142 (FIG. 6).
Are accepted at both ends. Also, the illustrated rotor 116
Are arranged on the annular base 146 and outside the annular base 146.
Annular portion 148, annular base 146 and annular portion 148
Are connected to each other. Such a rotor 1
Reference numeral 16 designates the annular base 146 having a small diameter of the first boss member 132.
Is fixed to one end by press-fitting into the part 136,
It is rotated integrally with the first boss member 132. In the embodiment
Are also provided on the inner peripheral edge of the annular base 146 of the rotor 116.
Recess 152 is formed. Formed on rotor 116
The recessed portion 152 is formed on the first boss member 132.
The pin receiving part is defined in cooperation with the
4 are notches 1 at both ends of the pin member 144.
40 and the recesses 152 (therefore, low
Fixing the screw 116 to the small diameter portion 136 of the first boss member 132
At this time, the concave portion 152 of the rotor 116 and the small-diameter portion 136
The notches 140 are aligned and press-fitted). Also, the embodiment
Amateur assembly 118 supports amateur 154, support
A member 156 and a biasing spring member 158 are included. support
The member 156 is composed of a short cylindrical member, and has a first boss portion.
The member 132 is rotatably mounted on the middle diameter portion 138.
On the inner peripheral edge of the end surface (right side in FIG. 1) of the support member 156
Is provided with an annular flange (FIG. 1). This support
Member 156 is preferably formed from lightweight plastic.
Good. Amateur 154 is the annulus 14 of rotor 116
8 is composed of an annular plate having an outer diameter substantially the same as the outer diameter of
Attached to the support member 156 via the biasing spring member 158
Have been. That is, the biasing spring member 158 is
6 is mounted on the annular flange, and its annular central portion 160
The support member 156 is fixed to the end face as required. Figure
The biasing spring member 158 shown extends outwardly from the annular central portion 160.
A plurality of sickle-shaped (three in the embodiment) protrusions
162, the free end of each of the plurality of protrusions 162
Is on one side of the amateur 154 (the left side in FIGS. 1 and 6).
And the surface opposite to the surface facing the rotor 116)
It is fixed by a fixing member 164 such as a rivet.
Therefore, in the second spring clutch mechanism 10 as well,
Amateur set on one side of the
A three-dimensional body 118 is provided, and the biasing spring member 158 is
A 154 to one side of the rotor 116, that is, the left side in FIG.
It has the effect of elastically biasing in the direction away from the object.
In the second spring clutch mechanism 10, the biasing spring
The member 158 is substantially similar to the first spring clutch mechanism 8.
In addition, an annular plate member 166 constituting a spring fixing member
Is preferably fixed to the support member 156 as required.
Good. In the second spring clutch mechanism 10,
Further, similarly to the first spring clutch mechanism 8, the support member 1
At the end face of 56, a piece of the rotor 116 is
Preferably, a plurality of protrusions 168 extending toward the surface are provided.
Of the annular flange provided on the support member 156.
The tip is brought into contact with or close to the one surface of the rotor 116
Is preferred. In the illustrated embodiment, the unit assembly
Is a shaft member by press-fitting the first boss member 132.
4 as required. In the embodiment, the shaft member
The required parts 4C of 4 are also processed like knurls
The left end of the first boss member 132 is located at the portion 4C.
Is pressed into contact with the right end face of the large diameter portion 4a.
The boss member 132 is rotated integrally with the shaft member 4.
You. The other surface of the gear 6 (right in FIGS. 1 and 6)
Surface), an annular boss 170 is also provided integrally,
A cylindrical second boss member 172 is mounted in 170.
ing. In the embodiment, the second boss member 172 is
The end face of the gear 6 from the other side is formed in the formed through hole 106.
By inserting a pair of protrusions 174 provided on the
It is mounted so as to rotate integrally with the gear 6. this
The second boss member 172 is attached to the first boss member 132.
1 and 6 to the right. Second
The boss member 172 can also be formed integrally with the gear 6.
You. The first boss member 132 and the second boss
The coil spring means 122 is fitted over the member 172.
You. Unit assembly in second spring clutch mechanism 10
The large diameter portion 134 of the first boss member 132 of the body is
The two boss members 132 and 1 extend toward the boss member 172.
The end faces of 72 are in contact or close to each other. This
The outer diameter of the large diameter portion 134 of the first boss member 132 and the second diameter
The outer diameter of the boss member 172 is substantially equal to that of the boss member 172.
The ill spring means 122 has a large diameter of the first boss member 132.
Is fitted over both the portion 134 and the second boss member 172.
Have been. In the embodiment, the coil spring means 122 is
1 and 6, the right-handed winding (therefore, the gear
6 has been rotated in the direction indicated by arrow 176 (FIG. 6).
At this time, a force for preventing the rotation of the support member 156 acts.
And the support member 156 is rotated relative to the gear 6.
In the direction of shrinking when pressed). Such a
One end 122a of the ill spring means 122 is connected to a support member 156.
Notch formed at the other end of the shaft (in the embodiment,
One of the notches formed at intervals)
The other end 122b
Is a notch 17 formed in the annular boss 170 of the gear 6.
8 (In the embodiment, four are formed at intervals in the circumferential direction.
By inserting it into one of the notches 178)
It is linked to As described above, the gear 6 has the arrow 17
When the electromagnetic means 120 is rotated in the direction indicated by 6,
When energized, the gear 6 and the amateur
The assembly 118 is rotated relative to the
The spring means 122 is contracted, thus driving the gear 6
The power is supplied to the second boss member 172, the coil spring means 122 and
And transmitted to the shaft member 4 via the first boss member 132.
You. The electromagnetic control spring clutch mechanism 2 as described above
In FIG. 1, as shown in FIG.
8 and the rotor 30 in the second spring clutch mechanism 10
And 116 have armature assemblies 32 and 118 on one side.
Electromagnetic means 34 on the other side of the rotors 30 and 116
And 120 are disposed, and the first spring clutch mechanism 8 is
Components in the second spring clutch mechanism 10
The various constituent elements are the shaft of the shaft member 4 with respect to the gear 6.
It is arranged substantially symmetrically on both sides in the line direction. That is, the first
The spring clutch mechanism 8 of FIG.
In FIG. 1, the second boss member 104
Spring means 36, first boss member 50, amateur assembly
The body 32, the rotor 30, and the electromagnetic means 34 are arranged, and the second
In the spring clutch mechanism 10 of FIG.
In FIG. 1, the second boss member 172
Il spring means 122, first boss member 132, armature
Assembly 118, a rotor 116 and electromagnetic means 120.
Is placed. The illustrated electromagnetically controlled spring clutch mechanism 2 includes:
Driving force from the gear 6 when the electromagnetic means 34 and 120 are de-energized
Is transmitted directly to the shaft member 4 and the shaft member 4 may rotate.
The shaft member 4 generates a braking force that constantly suppresses rotation.
Brake means 180 (FIG. 1) for applying
Have been. Referring to FIG. 7 together with FIG.
The storage means 180 will be described. Brake means shown
180 includes a rotating member 182. The other end of the shaft member 4
The portion penetrates the support base 14 and protrudes outward, and
A short cylindrical rotating member 182 is attached to the end. Example
Then, the rotating member 182 is passed through the
Are formed in the through hole 184 and the shaft member 4.
Pressing the pin member 186 into the formed hole (not shown)
And the rotating member 182 is fixed to the shaft member 4.
You. Therefore, the rotating member 182 rotates integrally with the shaft member 4.
You. In the embodiment, the inner surface of the rotating member 182 (that is,
The surface facing the support base 14) is made of synthetic leather or synthetic rubber.
Friction member 188 made of a material having a high coefficient of friction such as
It is stuck. On the other hand, the other end of the shaft member 4 is
It is supported by the support base 14 via 90. sleeve
A flange 196 is integrally provided at one end of the member 190.
Have been. The sleeve member 190 is provided on the flange 19
6 is located inside the support base 14, that is, the flange portion 1
96 is located between the support base 14 and the electromagnetic means 120.
The sleeve body 197 is attached to the support base 14 at
Extending outward through an opening formed in the support base 14
You. In the embodiment, as clearly shown in FIG.
The pair of flat surfaces 190a (FIG. 7)
Is shown), and the supporting group
The body 14 corresponds to the outer shape of the longitudinal section of the sleeve body 197.
Opening in the shape of the sleeve
With the body 197 positioned in the opening,
The leave member 190 rotates relative to the support base 14.
I will not do it. The braking means 180 further includes a braking unit
Material 192 is included. Composed of a sleeve-like member
The braking member 192 has a longitudinal section of the sleeve body 197.
A through hole 199 having a shape corresponding to the outer shape is formed.
(Accordingly, in defining the through hole 199 of the braking member 192,
A pair of outer surfaces of the sleeve body 197
A pair of flat surfaces 192a corresponding to the flat surfaces 190a of
This braking member 192 is
92 are mounted outside the sleeve body 197. Obedience
Therefore, as easily understood, the braking member 192 is
Although it does not rotate relative to the valve member 190,
The axial direction of the sleeve member 190, that is, left and right in FIG.
It is relatively movable in the direction. In the embodiment, the braking member
At the right end of 192, a flag corresponding to the outer shape of the rotating member 182 is provided.
The flange 198 is formed integrally. And then,
A braking member is provided between the flange portion 198 and the support base 14.
192 is fitted to the coil spring 194 (constituting the biasing means).
Are arranged. This coil spring 194 is furan
The braking member 192 is acted on the joint 198 to rotate the rotating member 182.
, Ie, to the right in FIG.
And thus the flange 198 of the braking member 192
The end face is rotated by the action of the coil spring 194.
2 elastically on the surface of the friction member 188 disposed on the inner surface
It is pressed. In the embodiment, the rotating member 182
Although a friction member 188 is provided, instead of this, a braking unit
Material 192 or a combination of the rotating member 182 and the braking member 192
Alternatively, a friction member may be provided. Next, the electromagnetically controlled spring clutch having the above-described configuration will be described.
The operation and effect of the H mechanism 2 will be described. First, referring to FIG. 1, FIG. 2 and FIG.
The car 6 is rotated in a predetermined direction indicated by an arrow 110 (FIG. 2).
If this is the case, the first case
The electromagnetic means 34 of the spring clutch mechanism 8 is energized and de-energized,
Thereby, the driving force of the gear 6 is selectively changed to the shaft member 4 (shaft portion).
The material 4 constitutes an output element). That is, the gear 6 rotates in the direction indicated by the arrow 110.
When the electromagnetic means 34 is energized while being rotated, the electromagnetic
The armature 72 is biased by the magnetic attraction of the means 34
1 against the elastic biasing action of the spring member 76.
And magnetically attracted to one side of the rotor 30
Thus, the armature 72 and the rotor 30 are connected.
On the other hand, the gear 6 is rotated in the direction indicated by the arrow 110 (FIG. 2).
And the supporting member 74 is also in the same direction via the coil spring means 36.
(The biasing spring portion is integrated with the support member 74).
The material 76 and the armature 72 have also been rotated). Follow
The armature 72 and the rotor 30 are magnetically attracted.
In the connected state, the shaft member 4 is also stopped.
As a result, a force acting on the support member 74 to prevent its rotation acts.
Thus, the gear 6 and the supporting portion are
The relative speed occurs between the members 74, and due to the speed difference,
The coil spring means 36 is contracted. Then, the coil
The second boss member 104 and the first boss member are
The shaft member 4 is connected to the first boss member 5.
0, via the coil spring means 36 and the second boss member 104
And is drivingly connected to the gear 6. Thus, the arrow of gear 6
The turning power in the direction indicated by 10 is transmitted to the shaft member 4 and
4 and thus the operating shaft 18 connected to it
Is rotated in the direction shown by the arrow 110. On the other hand, when the electromagnetic means 34 is de-energized,
The armature 72 is moved by the elastic biasing action of the spring member 76.
In FIG. 1, it moves to the right and separates from one side of rotor 30.
The above-described connection between the armature 72 and the rotor 30 is released.
(Ie, armature 72 is biased spring member 76).
It returns to the position shown in FIG. 1 by the action). This amachi
When the armature 72 returns, the support member 74 and the armature 72
To the elastic biasing action of the biasing spring member 76 interposed therebetween.
Therefore, the rotor 30 is moved in a direction away from one surface.
Therefore, the connection between the armature 72 and the rotor 30 is quickly released.
Is done. At the time of this return, the first boss member 50
The gap existing between the outer diameter of the diameter portion 56 and the inner diameter portion of the support member 74
Armature 72 is slightly inclined with respect to shaft member 4 due to
However, in the embodiment, one of the support members 74 is used.
The protrusion 96 provided on the end face is in contact with one side of the rotor 30.
The amateur 72 is slightly tilted because it is very close
When moved, the front end surface of the projection 96 of the support member 74 is
30 comes into contact with one side, and the armature 72
Of the responsiveness due to contact with one side of the
Is effectively prevented. Further, in the embodiment, the support member
The tip of the annular flange 78 is also in contact with one surface of the rotor 30.
Because of the contact or proximity, the so-called gas
Data can be reduced, and the decline in responsiveness is further prevented.
It is. The connection between the amateur 72 and the rotor 30 is released.
The coil spring hand stored during the above-described drive transmission
The support member 74 is indicated by an arrow 110 due to the elastic force of the step 36.
The coil spring means 36 expands
Is done. When the coil spring means 36 is expanded, the support member
74 is rotatably mounted on the first boss member 50,
The biasing spring member 76 and the armature 72
And only the plate member 86 is mounted.
Therefore, the supporting member 74 can receive the coil without receiving a large resistance.
Easily and quickly as required by the elastic force of the spring means 36
Rotated. Thus, the coil spring means 36 expands.
Between the second boss member 104 and the first boss member 50.
The connection by the spring means 36 is released, thus the gear
The drive connection between the shaft member 4 and the shaft member 4 is released. Such electromagnetic means
At the time of de-energization of the gear 34, as will be easily understood,
6 through the coil spring means 36 accompanying the rotation of
The member 74, the biasing spring member 76, and the armature 72 rotate.
Only. Also, the gear 6 moves in the direction indicated by the arrow 110.
When rotating, the second spring clutch mechanism 10
Of the electromagnetic means 120 is not energized, and therefore the second spring
In the clutch mechanism 10, the gear 6 is indicated by an arrow 110.
Through the coil spring means 122 accompanying the rotation in the
Supporting member 156, biasing spring member 158, and amateur 1
Only the 54 rotates. Contrary to the above, the gear 6 has an arrow 176
In the case of rotation in the direction shown in FIG.
The electromagnetic means 120 of the spring clutch mechanism 10 is energized and de-energized.
As a result, the driving force of the gear 6 is selectively applied to the shaft member 4.
Is transmitted. That is, the gear 6 rotates in the direction indicated by the arrow 176.
When the electromagnetic means 120 is energized while rotating,
The armature 154 is caused by the magnetic attraction of the magnetic means 120.
1 against the elastic biasing action of the biasing spring member 158.
To the right and magnetically attract it to one side of rotor 116
The armature 154 and rotor 116 are connected
Be in a state. Thus, a phase between the gear 6 and the support member 156 is obtained.
An opposing speed difference occurs, and due to the speed difference, the coil spring
Means 122 is contracted. When contracted, the coil
The second boss member 172 and the first button
Shaft member 4 is connected to the first boss member.
132, coil spring means 122 and second boss member 17
The driving gear 2 is connected to the gear 6 through the driving gear 2. Thus, gear 6
The rotational force in the direction indicated by the arrow 176 is transmitted to the shaft member 4.
The shaft member 4, and thus the working shaft 18 connected thereto,
It is rotated in the direction shown by arrow 176 with the rotation of car 6
You. On the other hand, when the electromagnetic means 120 is de-energized,
Due to the elastic biasing action of the biasing spring member 158, the armature 1
1 moves to the left in FIG.
Away from the armature 154 and the rotor 116.
Connection is released (ie, amateur 154 is biased)
It returns to the position shown in FIG. 1 by the action of the spring member 158.
). In this way, the core stored during the drive transmission described above
The support member 156 is moved by the elastic force of the
The coil spring is further rotated slightly in the direction indicated by arrow 176,
The means 122 is expanded. Thus, the coil spring means 1
22 expands, the second boss member 172 and the first boss member
The connection with the member 132 by the coil spring means 122 is released.
Thus, the drive connection between the gear 6 and the shaft member 4 is released.
You. When the electromagnetic means 120 is de-energized,
As will be appreciated, the rotation of the gear 6 is accompanied by a coil spring
Support member 156, biasing spring member 158 via step 122
And only the armature 154 rotates. Therefore,
In the second spring clutch mechanism 10, the first spring clutch
The same effect as that of the latch mechanism 8 is achieved. Also, gear 6
Is rotated in the direction indicated by arrow 176,
The electromagnetic means 34 of the first spring clutch mechanism 8 is not biased,
Therefore, in the first spring clutch mechanism 8, the gears
6 in conjunction with the rotation in the direction indicated by arrow 176
The support member 74, the biasing spring member 76 and
Only the amateur 72 rotates. In the above operation, the brake means 180
If the shaft member 4 is not provided, the shaft member 4 may rotate.
Was. More specifically, between the gear 6 and the shaft member 4
When the friction coefficient of the electromagnetic means 34 and 120 is large,
The rotational power of the gear 6 is directly transmitted to the shaft member 4 and thus transmitted.
The shaft member 4 is rotated by a relatively small force
There was. This tendency is caused by friction between the gear 6 and the shaft member 4.
Force, in other words the coefficient of friction between gear 6 and shaft member 4, gear
6 in the radial direction of the gear 6 (that is,
(In a direction substantially perpendicular to the direction).
When the friction force is large, the shaft member 4 rotates and the electromagnetic means 34 and
Operating shaft 18 despite the de-energization of
There is the disadvantage of rotation. On the other hand, as in the embodiment, the shaft member 4
If the brake means 180 is attached,
The rotation of the shaft member 4 due to a relatively weak force
Action, ie, the frictional force between the rotating member 182 and the braking member 192
Can be reliably prevented by the electromagnetic means
Prevents rotation of shaft member 4 during deenergization of 34 and 120
can do. In the embodiment, the rotating member 182
A friction member 188 is interposed between the
The rotation member 182 is braked by the action of the coil spring 194.
The structure is such that the member 192 is pressed against the member 192.
The rotation of the shaft member 4 during the deenergization of the means 34 and 120
It can be prevented more reliably. The above-mentioned brake means 180 is
The electromagnetically controlled spring clutch mechanism 2 is not limited to
Japanese Patent Application No. 60-78439,
To the electromagnetic control spring clutch mechanism, etc.
Can be. It should be noted that the electromagnetic control spring in the above-described embodiment is used.
In the latch mechanism 2, the first spring clutch mechanism 8
And the rotor 30 in the second spring clutch mechanism 10 and
116, the amateur assemblies 32 and 118, and the first
Boss members 50 and 132 are united as a unit assembly.
The reduced number of assembly elements, especially weight
The essential rotors 30 and 116 and the amateurs 72 and 1
The interval of 58 can also be kept constant. Also,
Matures 72 and 154 are biased spring members 76 and 158
Through the plate members 86 and 166
Since it is fixed to one end surface of the base plates 74 and 156, the plate portion
Materials 86 and 166 are in the loop of amateurs 72 and 154
Acting substantially uniformly over substantially the entire area of the central portions 80 and 160;
The annular central portions 80 and 160 are connected to the plate member 86 and
Between the support members 166 and the support members 74 and 156
Bias spring members 76 and 158, support
Members 74 and 156 and plate members 86 and 166
Can be downsized. In addition,
By fixing it to the support members 74 and 156
To prevent the deformation of amateurs 72 and 154 due to
Responsiveness is also improved due to this. Furthermore, the illustrated electromagnetically controlled spring clutch machine
In the structure 2, the first spring clutch mechanism 8
The first boss member 50 is press-fitted from one side of the shaft member 4 and has a large diameter.
A second spring clutch mechanism abutting against one end surface of the portion 4a
10 is the first boss member 132 on the other side of the shaft member 4
Press-fitting and contact the other end surface of the large diameter portion 4a,
The first boss member 5 together with the first boss members 50 and 132
Gear 6 and second boss member located between 0 and 132
Movement of 104 and 172 with respect to shaft member 4 is reliably prevented.
Further, for example, the electromagnetic control spring clutch mechanism 2 is
(When the shaft member 4 is arranged vertically)
Also have various structures due to the provision of the large diameter portion 4a.
The gaps between the components cannot be concentrated in one place.
Therefore, the first boss members 50 and 132 and the second boss
Coil spring means 36 and 12 between members 104 and 172
2 can be reliably prevented from entering. The electric power described above with reference to FIGS.
The magnetic control spring clutch mechanism is shown, for example, in FIGS.
Combined use as, for example, massage
It can be conveniently applied to vessels and the like. 8 and 9
A predetermined distance is provided between the support bases 12 and 14.
And two electromagnetic control spring clutch mechanisms 2a and 2b are provided.
Have been. Each electromagnetic control spring clutch mechanism 2a and 2b
The electromagnetically controlled spring clutch mechanism 2 shown in FIGS.
Have substantially the same configuration, and are therefore described in detail.
Is omitted. Between the supporting bases 12 and 14, a rotating
The shaft 200 is rotatably mounted. This rotating shaft 20
0 is equipped with a gear 202, and the gear 202
Meshed with the gear 6a in the control spring clutch mechanism 2a
The gear 6a is connected to the other electromagnetic control spring clutch mechanism 2
b is meshed with the gear 6b. Rotary axis 200
Drive, such as a transmission motor (not shown)
It is drivingly connected to the power source. Therefore, as shown in FIG.
The rotation axis 200 is turned by the forward rotation of the drive source (not shown).
When rotated in the direction indicated by 204,
The gear 6a is rotated in the direction indicated by arrow 210,
6b is rotated in the direction indicated by arrow 212. Meanwhile, drive
The reversal of the source (not shown) causes the rotation
When rotated in the direction indicated by 6, the gear 202
6a is rotated in the direction indicated by arrow 208, and the gear 6b
Is rotated in the direction indicated by arrow 214. In the illustrated composite clutch mechanism,
As can be easily understood from the above description, the rotation axis 200 is an arrow.
When rotated in the direction indicated by the mark 204,
The first spring clutch in the electromagnetic control spring clutch mechanism 2a
Switch mechanism 8a and the other electromagnetic control spring clutch mechanism 2b.
And the second spring clutch mechanism 10b are biased and de-energized.
(At this time, one of the electromagnetic control spring clutch mechanisms 2a
The second spring clutch mechanism 10a and the other electromagnetic
First spring clutch in control spring clutch mechanism 2b
Mechanism 8b is not energized), opposite to that described above
The rotation shaft 200 is rotated in the direction indicated by the arrow 206.
The other electromagnetic control spring clutch mechanism 2a
The second spring clutch mechanism 10a and the other electromagnetic control
First spring clutch mechanism 8 in spring clutch mechanism 2b
b is energized and de-energized (at this time, one electromagnetic control
First spring clutch mechanism in spring clutch mechanism 2a
8a and the other electromagnetic control spring clutch mechanism 2b
The second spring clutch mechanism 10b is not biased.
No). In the illustrated embodiment, the gear 6a and the gear 6b are opposed to each other.
The gear 6a is engaged so as to rotate in the opposite direction.
And the gear 6b are drivingly connected so as to rotate in the same direction.
(For example, an idle tooth between the gear 6a and the gear 6b).
In the case where a car is interposed), the rotation axis 200 is indicated by an arrow 2
Electromagnetic control spring when rotated in the direction indicated by 04
First spring clutch in clutch mechanisms 2a and 2b
The mechanisms 8a and 8b are energized and de-energized (at this time, the electromagnetic
Second spring in control spring clutch mechanisms 2a and 2b
The clutch mechanisms 10a and 10b are not energized.
The rotation axis 200 is indicated by an arrow 206
Electromagnetically controlled spring clutch
Second spring clutch mechanism 10 in mechanisms 2a and 2b
a and 10b are energized and de-energized (at this time,
First spring clutch in the spring clutch mechanisms 2a and 2b
The latch mechanisms 8a and 8b are not biased). The rotation shaft 200 rotates in the direction indicated by the arrow 204.
When the electromagnetic control spring clutch mechanism 2a is
When the first spring clutch mechanism 8a is energized,
Arrow 21 of the gear 6a via the first spring clutch mechanism 8a
0 is transmitted to the shaft member 4a.
Thus, the operating shaft 18a is rotated in the direction indicated by the arrow 210.
Further, when the electromagnetic control spring clutch mechanism 2b
When the second spring clutch mechanism 10b is energized, the second
Arrow 212 of gear 6b via spring clutch mechanism 10b
Is transmitted to the shaft member 4b, and thus
The operating shaft 18b is rotated in the direction indicated by the arrow 212. On the other hand, when the rotation axis 200 is
Electromagnetically controlled spring clutch mechanism
When the second spring clutch mechanism 8b of 2a is biased,
Arrow of the gear 6a via the first spring clutch mechanism 8b
The turning power in the direction indicated by the mark 208 is transmitted to the shaft member 4a,
Thus, the operating shaft 18a is rotated in the direction indicated by the arrow 208.
It is. In addition, the electromagnetic control spring clutch mechanism
When the first spring clutch mechanism 10a of FIG.
Arrow of gear 6b via first spring clutch mechanism 10a
The turning force in the direction indicated by 214 is transmitted to the shaft member 4b,
Thus, the operating shaft 18b is rotated in the direction indicated by the arrow 214.
You. The electromagnetic control spring clutch mechanisms 2a, 2b
Brake members 180a, 180
b is provided on each of the shaft members 4a and 4b.
Since the operating force for suppressing the rotation is applied, the first
Spring clutch mechanism 8a (or 8b) and second spring clutch
When the latch mechanism 10a (or 10b) is deenergized
Is controlled by the braking action of the braking means 180a and 180b.
Thus, the rotation of the shaft member 4a (or 4b) is reliably prevented.
You. The electromagnetically controlled spring clutch mechanism according to the present invention
Is configured as above, and the shaft member that is the output rotating element
Brake means for acting and braking the rotation of the shaft member.
Since the shaft member is provided, the shaft member is always
A braking force for suppressing rotation is applied.
Therefore, it is rotatably mounted on the shaft member in a predetermined direction and at a predetermined position.
One side of the input rotary element that is driven to rotate in the opposite direction to the fixed direction
A first spring clutch mechanism, and the input rotary element
Electromagnetic control spring having a second spring clutch mechanism on the other side
Even in the clutch mechanism, one brake means
The electromagnetic means of the first and second spring clutch mechanisms are de-energized.
The output rotary element rotates when
Can be prevented indeed, and the first or second
Was deenergized after the electromagnetic means of the spring clutch mechanism was energized.
Stop the rotation of the output rotary element instantaneously
Can be.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing an embodiment of an electromagnetically controlled spring clutch mechanism according to the present invention. FIG. 2 is a first view of the electromagnetically controlled spring clutch mechanism of FIG. 1;
FIG. 5 is an exploded perspective view showing the spring clutch mechanism of FIG. FIG. 3 is an exploded perspective view showing a unit assembly of the first spring clutch mechanism of FIG. 2 in an exploded manner. FIG. 4 is a sectional view showing a state where the unit assembly in the first spring clutch mechanism of FIG. 2 is mounted on a shaft member; FIG. 5 is a partially enlarged cross-sectional view for explaining a method of fixing a biasing spring member of the unit assembly of FIG. 2; FIG. 6 shows a second embodiment of the electromagnetically controlled spring clutch mechanism of FIG. 1;
FIG. 5 is an exploded perspective view showing the spring clutch mechanism of FIG. FIG. 7 is a perspective view showing a sleeve member and a rotation preventing member of brake means in the electromagnetic control spring clutch mechanism of FIG. 1; FIG. 8 is a side view showing one application example using the electromagnetic control spring clutch mechanism shown in FIG. 1; FIG. 9 is a diagram showing a portion viewed from line AA in FIG. 8; [Description of References] 2, 2a and 2b: electromagnetically controlled spring clutch mechanisms 4, 4a and 4b: shaft members 6, 6a and 6b: gears 8, 8a and 8b: first spring clutch mechanisms 10, 10a and 10b: 2 spring clutch mechanisms 30 and 116: rotors 32 and 118: armature assemblies 34 and 120: electromagnetic means 36 and 122: coil spring means 50 and 132: first boss members 72 and 154: armatures 74 and 156: support members 76 and 158: bias spring members 104 and 172: first boss members 180, 180a and 180b: brake means 182: rotating member 188: friction member 192: braking member

Claims (1)

(57) [Claims] A shaft member rotatably mounted on the shaft member, a predetermined direction rotatably mounted on the shaft member, and the predetermined direction
An input rotary element that is driven to rotate in the opposite direction to the input rotary element, a rotor that is provided on one side of the input rotary element and that is rotated integrally with the shaft member , an armature that is positioned opposite the rotor, and the armature. a biasing spring member resiliently biased in a direction away from the rotor, an electromagnetic means allowed to magnetically attracted to said armature to said rotor when energized against the resilient urging action of the biasing spring member, said input Rotation required
A first spring clutch mechanism comprising a coil spring means for transmitting the driving force from the input rotating element in the shaft member by shrinkage when the element is rotated in a predetermined direction, the input rotation It is arranged on the other side of the element and rotates integrally with the shaft member
The rotor to be squeezed and an arc
An armature and a direction separating the armature from the rotor
A biasing spring member that resiliently biases the
The armature is biased against the elastic biasing action of the biasing spring member.
Electromagnetic means for magnetically attracting the motor to the
Contracts when the element is rotating in the opposite direction to the predetermined direction
As a result, the driving force from the input rotary element is applied to the shaft member.
A second spring comprising coil spring means for transmitting
An electromagnetically controlled spring clutch mechanism comprising: a clutch mechanism; and a brake means for acting on the shaft member to brake the rotation of the shaft member. 2. The brake means includes a rotating member which rotates integrally with the shaft member includes a brake member for braking the rotation of the rotating member, the electromagnetic control spring clutch mechanism of claim 1, wherein. 3. 3. The electromagnetically controlled spring clutch mechanism according to claim 2 , wherein said braking means includes biasing means for pressing said shaft member and said braking member. 4. The electromagnetically controlled spring clutch mechanism according to claim 2 , wherein a friction member is mounted on at least one of the surfaces of the shaft member and the braking member that come into contact with each other.