JP2023108444A - Transfer mechanism and elastic member - Google Patents

Abstract

To provide a transfer mechanism capable of maintaining an effect of suppressing rattling and reducing a loss of rotational force.SOLUTION: A transfer mechanism 15 transferring rotational force is equipped with a first rotation object body 42, a first torque cable 41, and an elastic member 43. The first rotation object body 42 has a fitting hole 56. The first torque cable 41 has a fitting portion 55 inserted and fitted in the fitting hole 56, and transfers rotational force to the first rotation object body 42. The elastic member 43 is disposed between the fitting portion 55 and the first rotation object body 42, and deforms so as to stick along an inner peripheral surface 56a of the fitting hole 56 and an outer peripheral surface 55a of the fitting portion 55.SELECTED DRAWING: Figure 7

Description

The present invention relates to transmission mechanisms and elastic members.

Devices that operate objects, such as seat slide devices that move automobile seats and open/close devices that open and close sunroofs, absorb the misalignment of the axis of the object to be rotationally driven, or bend the object. Drives with flexible torque cables are employed to allow them to follow the routed routing. A torque cable is fitted to an object to be rotated and transmits rotational force to the object to be rotated. abnormal noise occurs.

Therefore, for example, a configuration in which a mall is planted on the surface of the torque cable (see, for example, Patent Document 1), a configuration in which a leaf spring is arranged between the torque cable and the rotating object (see, for example, Patent Document 2), etc. are disclosed. It is

JP 2013-72485 A JP-A-2005-30448

However, in the configuration using the molding as disclosed in Patent Document 1, the molding may come off due to wear after continued use, and the effect of suppressing the backlash may be reduced. Further, in the configuration using a leaf spring as disclosed in Patent Document 2, there is a problem that the rotational force transmitted to the rotating object is lost.

SUMMARY OF THE INVENTION An object of the present disclosure is to provide a transmission mechanism and an elastic member capable of maintaining an effect of suppressing backlash and reducing loss of rotational force.

A transmission mechanism according to the present invention is a transmission mechanism for transmitting a rotational force, and includes a rotation target body having a fitting hole and a fitting portion that is inserted and fitted into the fitting hole, and the rotation target body an elastic member disposed between the fitting portion and the rotating object and deformed so as to be in close contact along the inner surface of the fitting hole and the outer surface of the fitting portion; Prepare.

In addition, the elastic member of the present invention is provided between the outer surface of the fitting portion of the cable that transmits rotation to the rotating object, which is inserted and fitted into the fitting hole of the rotating object and the inner surface of the fitting hole. and includes a press-fitting hole into which the fitting portion is press-fitted, and the cross-sectional area of the fitting portion perpendicular to the press-fitting direction into the press-fitting hole is the press-fitting direction larger than the cross-sectional area of the press-fit hole perpendicular to the

Advantageous Effects of Invention According to the present disclosure, it is possible to provide a transmission mechanism and an elastic member capable of maintaining the effect of suppressing backlash and reducing the loss of rotational force.

FIG. 2 is a plan view showing the driving device according to the embodiment of the present disclosure; FIG. 2 is a side view showing an example of a first rotating object and a slide mechanism of the driving device according to the embodiment of the present disclosure; FIG. 4 is a diagram showing a first torque cable in the embodiment according to the present disclosure; FIG. FIG. 4 is a perspective view showing a state in which the first end of the first torque cable is connected to the first rotating object in the embodiment according to the present disclosure; FIG. 5 is a perspective view showing a state in which the first end of the first torque cable shown in FIG. 4 is separated from the first rotating object; FIG. 6 is a perspective view showing a state in which an elastic member is removed from the first end of the first torque cable shown in FIG. 5; FIG. 5 is a cross-sectional view including the central axis of rotation of FIG. 4 ; (a) A side view of the elastic member in the embodiment according to the present disclosure, (b) A front view of the elastic member in the embodiment according to the present disclosure. (a) A diagram illustrating press-fitting the first end of the first torque cable in the embodiment according to the present disclosure into the through-hole of the elastic member, (b) The first torque cable in the embodiment according to the present disclosure The figure which shows the state press-fitted in the through-hole of the elastic member. (a) A diagram for explaining cutting off the grip portion of the elastic member from the state shown in FIG. FIG. 10 is a view for explaining inserting a part into the first rotating object;

A transmission mechanism of an embodiment according to the present disclosure will be described below with reference to the drawings. The transmission mechanism of this embodiment is used in, for example, a driving device.

(Outline of drive device 1)
FIG. 1 is a top view showing the configuration of a driving device 1 according to this embodiment. The drive device 1 of the present embodiment is, for example, a seat slide device that slides a seat. The drive device 1 includes a rotation drive unit 11, a support member 12, a pair of slide mechanisms 13 and 14, a first transmission mechanism 15 (an example of a transmission mechanism), and a second transmission mechanism 16 (an example of a transmission mechanism). , has A driving force from the rotation drive unit 11 is transmitted to the slide mechanism 13 via the first transmission mechanism 15 . A driving force from the rotation drive unit 11 is transmitted to the slide mechanism 14 via the second transmission mechanism 16 . When a driving force is transmitted from the rotation drive unit 11, the slide mechanisms 13 and 14 are actuated, and the seats (not shown) attached to the slide mechanisms 13 and 14 move back and forth.

(Rotation drive unit 11)
The rotation driving unit 11 rotates the driven object. The rotary drive unit 11 can rotate forward and backward. The rotation driving portion 11 is connected to an output portion 11a connected to a first torque cable 41 (an example of a cable) of the first transmission mechanism 15 and to a second torque cable 44 (an example of a cable) of the second transmission mechanism 16. and an output section 11b. The rotation drive unit 11 rotates the first torque cable 41 and the second torque cable 44 about their respective axes in one direction and the other direction.
Although the first torque cable 41 and the second torque cable 44 are connected to the rotation drive section 11 in a substantially straight line, they may be connected in a curved state.

As a result, the first rotating object 42 (an example of the rotating object) of the first transmission mechanism 15 connected to the first torque cable 41 and the second rotation object of the second transmission mechanism 16 connected to the second torque cable 44 are controlled. 2. A rotation object 45 (an example of a rotation object) rotates in one direction and the other direction. The rotary drive unit 11 may be, for example, a motor, but is not particularly limited as long as it drives the object to rotate.

(Support member 12)
The support member 12 supports the rotary drive section 11 . The structure of the support member 12 is not particularly limited. The support member 12 can be, for example, a support bracket or a housing capable of supporting the rotary drive unit 11 . In this embodiment, the support member 12 is arranged to connect the pair of slide mechanisms 13 and 14 . The support member 12 is connected to each slide member 22 of the pair of slide mechanisms 13 and 14 . The support member 12 is configured to move together with the slide member 22 , but may be configured not to move together with the slide member 22 .

(Slide mechanisms 13, 14)
The slide mechanism 13 is connected to the first rotating object 42 of the first transmission mechanism 15 . The slide mechanism 14 is connected to the second rotating object 45 of the second transmission mechanism 16 . FIG. 2 is a side view of the slide mechanism 13. FIG. Since the slide mechanism 13 and the slide mechanism 14 have the same configuration, the slide mechanism 13 will be described as an example.

Each of slide mechanism 13 and slide mechanism 14 has guide rail 21 , slide member 22 , and conversion portion 23 . Rotational motion of the first rotating object 42 of the first transmission mechanism 15 is converted into linear motion via the converting portion 23 , and the slide member 22 moves relative to the guide rail 21 .

The guide rail 21 is attached to an installation target such as a vehicle body. The slide member 22 is arranged movably with respect to the guide rail 21 . A seat is attached to the slide member 22 . The sheet is moved by the movement of the slide member 22 with respect to the guide rail 21 .

The conversion unit 23 of the slide mechanism 13 transmits the rotational drive of the first rotating object 42 to the slide member 22 of the slide mechanism 13 . The converting portion 23 has a worm wheel 31 , a rod member 32 and a nut member 33 . The converting portion 23 is supported by the slide member 22 .

The worm wheel 31 meshes with a first rotating object 42 shown as a worm gear. The rod member 32 is, for example, a spindle and has a threaded portion on its outer circumference. The rod member 32 extends along the sliding direction of each slide member 22 . The rod member 32 is rotatably supported by the slide member 22 . A worm wheel 31 is fixed to the rod member 32 . The rod member 32 and the worm wheel 31 are arranged coaxially. The nut member 33 is arranged to be screwed onto the outer periphery of the rod member 32 . The nut member 33 is fixed to the guide rail 21 .

The converting portion 23 of the slide mechanism 14 transmits the rotational drive of the second rotating object 45 to the slide member 22 in the same manner as the converting portion of the slide mechanism 13 .

Rotation of the first rotating object 42 and the second rotating object 45 causes the rod member 32 connected to the worm wheel 31 of each of the slide mechanisms 13 and 14 to rotate about the axis. When the rod member 32 rotates, the rod member 32 moves axially because the nut member 33 is fixed to the guide rail 21 . As the rod member 32 moves in the axial direction with respect to the nut member 33, the slide member 22 supporting the rod member 32 moves. As a result, the seat fixed to the slide member 22 is moved.

(First transmission mechanism 15, second transmission mechanism 16)
The first transmission mechanism 15 has, as shown in FIG. 1, a first torque cable 41, a first rotating object 42, and an elastic member 43 (see FIG. 5 described later). The second transmission mechanism 16 has a second torque cable 44 , a second object of rotation 45 , and an elastic member 43 .

The first torque cable 41 is a cable that transmits a rotational force to the first rotating object 42, and is an elongated flexible member. FIG. 3 is a side view showing the first torque cable 41. FIG. The first torque cable 41 is configured to transmit the rotational force of the rotary drive section 11 to the first rotation object 42 .

Since the first torque cable 41 is flexible, even if there is a dimensional tolerance or a positional deviation during installation of the rotation drive unit 11 and the first rotating object 42, the first torque cable 41 is bent and the size is reduced. Tolerances, positional deviations, etc. can be absorbed. In addition, the first torque cable 41 can be routed along a curved routing path, and can transmit the rotation of the rotation driving section 11 to the first rotational object 42 in a curved state.

The first torque cable 41 has a first end 51, a second end 52, and a central portion 53, as shown in FIG. The first end 51 and the second end 52 are both ends of the first torque cable 41 . The central portion 53 is arranged between the first end 51 and the second end 52 . The first end portion 51 is connected to the first rotating object 42 via an elastic member 43 (see FIG. 3 described later). The second end portion 52 is connected to the output portion 11a (see FIG. 1) of the rotary drive portion 11 via the elastic member 43. As shown in FIG.

Each of the first end portion 51 and the second end portion 52 of the first torque cable 41 has a tip portion 54 and a fitting portion 55 . The tip portion 54 is the tip portion of the first torque cable 41 .

The fitting portion 55 of the first end portion 51 is a portion that is connected to the first rotational object 42 having a fitting hole. The fitting portion 55 is arranged between the tip portion 54 and the central portion 53 . The fitting portion 55 is arranged on the root side of the tip portion 54 . The tip portion 54 has a substantially cylindrical shape. The cross-sectional area perpendicular to the direction along the axis A centered on the tip portion 54 is slightly smaller than the cross-sectional area of the fitting portion 55 . When viewed along the axis A, the tip portion 54 is positioned slightly inside the fitting portion 55 .

FIG. 4 is a perspective view showing a state in which the first end 51 of the first torque cable 41 is connected to the first rotating object 42. As shown in FIG. FIG. 5 is a perspective view showing a state in which the first end 51 of the first torque cable 41 is separated from the first rotating object 42. FIG. FIG. 6 is a diagram showing a state in which the elastic member 43 is removed from the first end portion 51 in FIG. 7 is a cross-sectional view including the axis in FIG. 4. FIG. FIG. 4 shows the axis A, which is the center of rotation of the first object to be rotated 42 . The axis A coincides with the central axis of the first end 51 of the first torque cable 41 .

As shown in FIG. 5, a fitting hole 56 into which the first end portion 51 is inserted is formed in the first rotating object 42 . The shape of the outer peripheral surface 55a (an example of the outer surface) of the fitting portion 55 of the first end portion 51 is similar to the shape of the inner peripheral surface 56a (an example of the inner surface) of the fitting hole 56 of the first rotating object 42 in the axial direction. is configured to engage with. The fitting portion 55 of the second end portion 52 is a portion connected to the output portion 11 a of the rotation drive portion 11 . Although not shown, a fitting hole is formed in the output portion 11a, and the second end portion 52 is inserted into the fitting hole of the output portion 11a. The outer peripheral surface shape of the fitting portion 55 of the second end portion 52 is formed so as to engage with the inner peripheral surface shape of the fitting hole of the output portion 11a in the axial direction.

For example, as shown in FIGS. 4 and 5, the fitting portion 55 is formed in a square prism shape. The cross-sectional shape of the fitting portion 55 perpendicular to the axis A is square.

The fitting hole 56 is formed in a shape corresponding to the fitting portion 55 . The inner space of the fitting hole 56 is formed in a square prism shape. The shape of the fitting hole 56 in a cross section perpendicular to the axis A is square. Since the shape of the inner peripheral surface 56a of the fitting hole 56 corresponds to the shape of the outer peripheral surface 55a of the fitting portion 55, the fitting portion 55 is engaged with the first rotational object 42 in the axial direction. match.

The second end portion 52 is also formed in the same shape as the first end portion 51, and although not shown, the fitting hole of the output portion 11a is also formed in the same shape as the fitting hole 56 of the first rotational object 42. ing. The fitting portion 55 of the first end portion 51 and the fitting portion 55 of the second end portion 52 may have different shapes. As long as the shape of the outer peripheral surface of the fitting portion 55 of the first end portion 51 can be fitted in the direction around the axis A, the shape of the inner peripheral surface of the fitting hole of the output portion 11 a is the shape of the second end portion 52 . The outer peripheral surface shape of the fitting portion 55 may be any shape that allows fitting in the direction around the axis A.

(Elastic member 43)
The elastic member 43 is arranged around the fitting portion 55 as shown in FIG. The elastic member 43 is arranged between the fitting portion 55 and the first rotational object 42, as shown in FIG. The elastic member 43 is arranged to close the looseness between the fitting portion 55 and the first rotating object 42 . The elastic member 43 is deformed as shown in FIG. 7 and closely adheres along the outer peripheral surface 55 a of the fitting portion 55 and the inner peripheral surface 56 a of the fitting hole 56 .

The material forming the elastic member 43 is not particularly limited as long as it has elasticity, and for example, an elastomer or rubber can be used. The rubber hardness of the elastic member 43 is preferably 70° or less, more preferably 35°. When the elastic member 43 is press-fitted into the fitting portion 55, the smaller the rubber hardness, the easier the fitting.

The elastic member 43 is attached around the fitting portion 55 of the first end portion 51 , and the first end portion 51 is fitted with the first rotational object 42 while the fitting portion 55 is covered with the elastic member 43 . It is inserted into hole 56 .

The shape of the elastic member 43 before being attached to the first end portion 51 will be described. 8A is a side view of the elastic member 43. FIG. FIG. 8B is a front view of the elastic member 43. FIG.

The elastic member 43 has a body portion 61 and a grip portion 62 . The outer peripheral surface shape of the body portion 61 is similar to the outer peripheral surface shape of the fitting portion 55 and the inner peripheral surface shape of the fitting hole 56 . The main body portion 61 is not particularly limited as long as it has a structure that can cover the fitting portion 55 in close contact with it. For this purpose, it is preferable that the outer peripheral surface shape of the fitting portion 55 and the inner peripheral surface shape of the fitting hole 56 are similar in shape. In this embodiment, the outer peripheral surface shape of the main body portion 61 is formed into a substantially square prism shape. A through hole 63 is formed in the body portion 61 . The through hole 63 is formed along the axis A that is the center of the main body portion 61 .

The shape of the inner peripheral surface of the through hole 63 corresponds to the shape of the outer peripheral surface of the fitting portion 55 . The cross section of the main body 61 perpendicular to the axis A has a square shape. The shape of the through-hole 63 perpendicular to the axis A (which can be said to be the inside of the body portion 61) is square. The square shape of the main body 61 and the square shape of the through hole 63 are arranged so that their sides are parallel to each other as shown in FIG. 8B. The first end portion 51 is press-fitted into the through-hole 63 as shown in FIGS. 9A and 9B, which will be described later. The first end portion 51 is press-fitted along the central axis of the through hole 63 .

The through hole 63 includes a press-fit hole 71, an inlet hole 72, and a connection hole 73, as shown in FIG. 8(a). The press-fit hole 71, the inlet hole 72, and the connection hole 73 have the same cross-sectional shape, but different cross-sectional areas. The center axes of the press-fitting hole 71, the inlet hole 72 and the connecting hole 73 are aligned.

A cross-sectional area perpendicular to the axis A of the press-fitting hole 71 is smaller than a cross-sectional area perpendicular to the axis A of the fitting portion 55 . Accordingly, when the first end portion 51 is press-fitted into the press-fitting hole 71, the elastic member 43 is stretched. The inlet hole 72 is formed at the end of the body portion 61 into which the first end portion 51 is inserted. The inlet hole 72 is formed to have approximately the same cross-sectional area as the fitting portion 55 or the tip portion 54 of the first end portion 51 . The cross-sectional area of the inlet hole 72 is formed to be larger than the cross-sectional area of the press-fit hole 71 . The connection hole 73 is arranged between the inlet hole 72 and the press-fit hole 71 to connect the inlet hole 72 and the press-fit hole 71 . The cross-sectional area of the connection hole 73 gradually decreases from the inlet hole 72 toward the press-fit hole 71 . The inner peripheral surface of the connection hole 73 is tapered from the inlet hole 72 toward the press-fit hole 71 .

The thickness from the outer peripheral surface to the inner peripheral surface of the body portion 61 is formed substantially constant in the direction along the axis A, as shown in FIG. 8(a). The body portion 61 has a first portion 81 forming the press-fit hole 71 , a second portion 82 forming the inlet hole 72 , and a third portion 83 forming the connecting hole 73 . Since the cross-sectional area of the inlet hole 72 is formed to be larger than the cross-sectional area of the press-fit hole 71 , the second portion 82 is formed to have a larger outer shape than the first portion 81 . The third portion 83 is formed such that its outer shape gradually increases from the first portion 81 toward the second portion 82 .

The grip portion 62 is a portion that is gripped by an operator when press-fitting the first end portion 51 into the through hole 63 . The grip portion 62 is connected to the body portion 61 . The position of the gripping portion 62 in the main body portion 61 is not particularly limited, but it is preferable to arrange it at the end of the main body portion 61 on the side where the first end portion 51 is press-fitted, because it is easier to press-fit. The grip portion 62 may have any shape as long as it can be gripped by the operator.

In the present embodiment, two holding portions 62 are formed with the through hole 63 interposed therebetween. Each grip portion 62 has a substantially plate shape. The pair of grips 62 extends from the end 83a of the third portion 83 toward the outside of the central axis. The pair of grips 62 extends from the end 83a toward the side opposite to the first portion 81. As shown in FIG. The pair of grips 62 are arranged at portions of the end 83 a of the third portion 83 facing each other across the entrance hole 72 .

(connection work)
Next, the operation of connecting the first torque cable 41 to the first rotating object 42 via the elastic member 43 will be described. FIGS. 9(a), 9(b), 10(a), and 10(b) explain the operation of connecting the first torque cable 41 to the first rotational object 42 via the elastic member 43. FIG. It is a diagram for

As shown in FIG. 9A , the first end 51 of the first torque cable 41 is press-fitted into the through hole 63 of the elastic member 43 . By gripping the gripping portion 62, inserting the tip portion 54 of the first end portion 51 into the inlet hole 72 of the elastic member 43, and further pushing the tip portion 54 into the through hole 63, as shown in FIG. , the fitting portion 55 is press-fitted into the press-fitting hole 71 . The press-fitting direction (see the arrow) matches the direction along the axis A of the through hole 63 and the direction along the axis A of the first end portion 51 . Here, the first torque cable 41 is press-fitted into the through hole 63 of the elastic member 43 until the elastic member 43 rides on the central portion 53 of the first torque cable 41 . As shown in FIG. 9B, the tip 54 of the first end 51 passes through the through-hole 63 and is exposed from the elastic member 43, so that the first torque cable 41 is attached to the elastic member 43 until the end. It is possible to visually confirm whether the insertion is correct. By press-fitting, the elastic member 43 is thinly stretched and deformed in the range where the first torque cable 41 is press-fitted, and is crimped so as to cover the outer periphery of the fitting portion 55 of the first torque cable 41 . Thereby, the fitting portion 55 is uniformly covered with the elastic member 43 .

Next, as shown in FIG. 10( a ), the pair of gripping portions 62 are cut off from the body portion 61 .

Next, as shown in FIG. 10B, the first end portion 51 of the first torque cable 41 whose fitting portion 55 is covered with the elastic member 43 is inserted into the fitting hole 56 of the first rotating object 42. (see arrow).

As a result, as shown in FIGS. 4 and 7 , the first rotating object 42 and the first torque cable 41 can be connected via the elastic member 43 .

In the above-described embodiment, the configuration in which the elastic member 43 is arranged between the first end portion 51 of the first torque cable 41 and the first rotation object 42 has been described. The configuration between the portion 52 and the output portion 11a of the rotary drive portion 11 is the same, and the elastic member 43 is arranged between the fitting portion 55 of the second end portion 52 and the insertion hole of the output portion 11a. Both ends of the second torque cable 44 may also have the same shape as the first end 51 of the first torque cable 41 . That is, as in the above-described embodiment, the elastic member 43 may be arranged between the fitting portion at one end of the second torque cable 44 and the second rotation object 45 , and the second torque cable 44 An elastic member 43 may be arranged between the fitting portion at the other end of the rotary drive portion 11 and the output portion 11b of the rotary drive portion 11 .

(Characteristics, effects, etc.)
In the first transmission mechanism 15 of the present embodiment, the elastic member 43 deforms along the inner peripheral surface 56a of the fitting hole 56 and the outer peripheral surface 55a of the fitting portion 55 so as to be in close contact with each other. In addition, it is possible to maintain the effect of suppressing the backlash of the first rotation target body 42 by making it difficult for the wear and the like to occur. Further, since the first torque cable 41 and the first rotating object 42 are in close contact with each other, loss of rotational force is less likely to occur, and the loss can be reduced.

The elastic member 43 can be brought into close contact with the fitting hole 56 of the first rotating object 42 and the fitting portion 55 of the first torque cable 41 by using rubber or elastomer as its material.

By setting the hardness of the elastic member 43 to 70° or less, it becomes easier to insert the first torque cable 41 into the through-hole 63 of the elastic member 43 during manufacturing, and the elastic member 43 is connected to the fitting portion 55 and the second torque cable. It can be easily arranged between the one-rotation object 42 . In addition, the elastic member 43 can be brought into close contact with the fitting hole 56 of the first rotating object 42 and the fitting portion 55 of the first torque cable 41 .

By making the cross-sectional area of the press-fitting hole 71 smaller than the cross-sectional area of the fitting portion 55, the first torque cable 41 is press-fitted into the elastic member 43, and the elastic member 43 is stretched thinly. is crimped so as to cover the fitting portion 55 of the . As a result, the elastic member 43 is in close contact with the outer peripheral surface 55a of the fitting portion 55 and the inner peripheral surface 56a of the fitting hole 56, so that the effect of suppressing backlash and the like is less likely to occur. In addition, since the first torque cable 41 and the first rotating object 42 are in close contact with each other by the elastic member 43, loss of rotational force is less likely to occur, and the loss can be reduced.

By providing the gripping portion 62 in the elastic member 43, an operator can grip the gripping portion 62 when press-fitting the fitting portion 55 of the first torque cable 41 into the through hole 63. The fitting portion 55 of 41 can be easily press-fitted into the through hole 63 .

Forming the grip portion 62 at the end 83a of the elastic member 43 on the side where the first torque cable 41 of the body portion 61 is inserted makes it easier to press fit the fitting portion 55 into the through hole 63 .

In the elastic member 43 of the present embodiment, the connecting hole 73 connecting the inlet hole 72 and the press-fitting hole 71 has a tapered inner surface so that the cross-sectional area gradually decreases from the inlet hole 72 toward the press-fitting hole 71 . Therefore, the fitting portion 55 of the first torque cable 41 can be easily press-fitted into the through hole 63 .

The features and effects of the present embodiment described above can also be applied to the second end portion 52 of the first torque cable 41 and the output portion 11a. In addition, the features and effects of the present embodiment can be applied to one end of the second torque cable 44 and the second object of rotation 45, and furthermore, the other end of the second torque cable 44 and the output It can also be applied to the portion 11b.

For example, it is understood that the following aspects also belong to the technical scope of the present disclosure. These aspects can be arbitrarily combined as needed.

A transmission mechanism according to a first aspect is a transmission mechanism that transmits a rotational force, and includes a rotating object, a cable, and an elastic member. The rotating object has a fitting hole. The cable has a fitting portion that is inserted and fitted into the fitting hole, and transmits rotational force to the rotating object. The elastic member is arranged between the fitting portion and the rotation object, and deforms so as to be in close contact along the inner surface of the fitting hole and the outer surface of the fitting portion.

In this way, since it is deformed so as to closely fit along the inner surface of the fitting hole and the outer surface of the fitting portion, it is possible to maintain the effect of suppressing backlash while preventing wear and the like from occurring. In addition, since the cable and the object to be rotated are in close contact with each other, the loss of rotational force is less likely to occur, and the loss can be reduced.

A transmission mechanism according to a second aspect is the transmission mechanism according to the first aspect, wherein the elastic member is made of rubber or elastomer.

By using rubber or elastomer in this manner, the elastic member can be brought into close contact with the fitting hole of the rotating object and the fitting portion of the cable.

A transmission mechanism according to a third aspect is the transmission mechanism according to the first aspect, wherein the hardness of the elastic member is 70° or less.

As a result, the cable can be easily inserted into the through hole of the elastic member during manufacturing, and the elastic member can be easily arranged between the fitting portion and the rotating object. In addition, it can be brought into close contact with the fitting hole of the object to be rotated and the fitting portion of the cable.

The elastic member according to the fourth aspect is provided between the outer surface of the fitting portion that is inserted and fitted into the fitting hole of the rotating object and the inner surface of the fitting hole in the cable that transmits the rotational force to the rotating object. and includes a press-fitting hole into which the fitting portion is press-fitted. The cross-sectional area of the fitting portion perpendicular to the direction of press-fitting into the press-fitting hole is larger than the cross-sectional area of the press-fitting hole perpendicular to the direction of press-fitting.

Since the cross-sectional area of the press-fitting hole is smaller than the cross-sectional area of the fitting portion, the cable is press-fitted into the elastic member, and the elastic member is stretched thin and crimped so as to cover the fitting portion of the torque cable. be done. Accordingly, since the elastic member is in close contact with the outer surface of the fitting portion and the inner surface of the fitting hole, it is possible to maintain the effect of suppressing backlash while preventing wear and the like from occurring. In addition, since the cable and the object to be rotated are in close contact with each other, the loss of rotational force is less likely to occur, and the loss can be reduced.

An elastic member according to a fifth aspect is the elastic member according to the fourth aspect, and includes a body portion and a grip portion. The body portion includes a press-fit hole and is disposed on the outer surface of the fitting portion. The gripping portion is formed on the outer surface of the main body and is gripped when the fitting portion of the cable is press-fitted into the press-fitting hole.

As a result, when the fitting portion of the cable is press-fitted into the press-fitting hole, the operator can grip the holding portion, so that the fitting portion of the cable can be easily press-fitted into the press-fitting hole.

The elastic member according to the sixth aspect is the elastic member according to the fifth aspect, wherein the grip portion is formed at the end of the main body portion on the side where the cable is inserted.

By forming the holding portion at the end of the main body portion where the cable is inserted in this manner, the fitting portion can be more easily press-fitted into the press-fitting hole.

An elastic member according to a seventh aspect is the elastic member according to any one of the fourth to sixth aspects, further including an inlet hole and a connecting hole. The inlet hole is formed at the end into which the cable is inserted and has a cross-sectional area larger than that of the press-fit hole. The connection hole connects the press-fitting hole and the inlet hole, and has a tapered inner surface so that the cross-sectional area decreases from the inlet hole toward the press-fitting hole.

Since the inner surface of the connection hole connecting the press-fitting hole and the inlet hole is tapered so that the cross-sectional area gradually decreases from the inlet hole to the press-fitting hole, it is difficult to fit the cable into the press-fitting hole. It becomes easier to press fit the part.

(Other embodiments)
An embodiment of the present disclosure has been described above, but the present disclosure is not limited to the above embodiment, and various modifications are possible without departing from the gist of the present disclosure.

(A)
Although the driving device 1 of the above embodiment is used to move the sheet, it is not limited to this. The driving device 1 may be used, for example, as an operating device for a power lift gate, an opening/closing device for opening and closing a sunroof, and the like.

(B)
The conversion unit 23 of the above embodiment has a mechanism such as a worm gear and a worm wheel. The rotational motion of the rotating object 45 may be converted into a desired motion. Further, the driving device 1 is a mechanism for operating an operation target by converting the rotational motion of the first rotation target body 42 and the second rotation target body 45 into a motion other than a linear motion, such as a rotation motion of another member. good too.

(C)
In the above-described embodiment, the outer shape of the fitting portion 55 and the inner shape of the fitting hole 56 are in the shape of a regular quadrangular prism. It may have a shape with projections. In short, the shape of the outer peripheral surface of the fitting portion 55 and the shape of the inner peripheral surface of the fitting hole 56 may be shapes that allow fitting in the direction around the axis A. The outer peripheral surface shape of the body portion 61 of the elastic member 43 and the inner peripheral surface shape of the press-fitting hole 71 are also square prisms, but are not limited to this, and may be regular polygonal prisms. However, since it is preferable to make the thickness of the elastic member 43 uniform, the outer peripheral surface shape of the body portion 61 of the elastic member 43 and the inner peripheral surface shape of the press-fitting hole 71 are the same as the outer peripheral surface shape of the fitting portion 55 and the fitting hole. It is preferable to match the shape of the inner peripheral surface of 56 .

(D)
Although the surface of the elastic member 43 in the above embodiment is formed flat, it may have an uneven structure or a convex portion.

(E)
Although the inlet hole 72 and the connection hole 73 are formed in the elastic member 43 of the above embodiment, these may not be formed and only the press-fit hole 71 may not be formed. In this case, the through holes 63 are aligned with the press-fit holes 71 .

INDUSTRIAL APPLICABILITY The transmission mechanism and the elastic member of the present disclosure have an effect of suppressing looseness and an effect of reducing rotational force loss, and are useful as a seat moving device or the like.

Reference Signs List 1 : drive device 11 : rotary drive unit 11a : output unit 11b : output unit 12 : support member 13 : slide mechanism 14 : slide mechanism 15 : first transmission mechanism 16 : second transmission mechanism 21 : guide rail 22 : slide member 23 : conversion part 31 : worm wheel 32 : rod member 33 : nut member 41 : first torque cable 42 : first rotating object 43 : elastic member 44 : second torque cable 45 : second rotating object 51 : first end Part 52 : Second end 53 : Central part 54 : Tip part 55 : Fitting part 55a : Outer peripheral surface 56 : Fitting hole 56a : Inner peripheral surface 61 : Body part 62 : Gripping part 63 : Through hole 71 : Press-fitting hole 72: inlet hole 73: connection hole 81: first portion 82: second portion 83: third portion 83a: end A: shaft

Claims (7)

A transmission mechanism that transmits a rotational force,
a rotating object having a fitting hole;
a cable having a fitting portion that is inserted into and fitted into the fitting hole and that transmits a rotational force to the rotating object;
an elastic member disposed between the fitting portion and the rotation object, and deformed so as to be in close contact along the inner surface of the fitting hole and the outer surface of the fitting portion;
transmission mechanism. The elastic member is made of rubber or elastomer,
2. The transmission mechanism of claim 1. The hardness of the elastic member is 70° or less.
3. The transmission mechanism according to claim 1 or 2. An elastic member that is placed in close contact between an outer surface of a fitting portion that is inserted into and fitted into a fitting hole of the rotating object and an inner surface of the fitting hole in a cable that transmits a rotational force to the rotating object. a member,
including a press-fitting hole into which the fitting portion is press-fitted;
The cross-sectional area of the fitting portion perpendicular to the direction of press-fitting into the press-fitting hole is larger than the cross-sectional area of the press-fitting hole perpendicular to the direction of press-fitting,
elastic member. a body portion including the press-fitting hole and arranged on the outer surface of the fitting portion;
a gripping portion formed on the outer surface of the body portion and gripped when the fitting portion of the cable is press-fitted into the press-fitting hole;
The elastic member according to claim 4. The grip portion is formed at the end of the main body portion on the side where the cable is inserted,
The elastic member according to claim 5. an entrance hole formed at the end of the side into which the cable is inserted and having a cross-sectional area larger than that of the press-fitting hole;
a connection hole connecting the press-fitting hole and the inlet hole and having a tapered inner surface so that the cross-sectional area gradually decreases from the inlet hole toward the press-fitting hole;
The elastic member according to any one of claims 4 to 6.

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