JP6914137B2 - Damper device - Google Patents

Description

The present invention relates to a damper device.

Conventionally, various damper devices have been used. Various gears are generally used in such a damper device, but there is a configuration that regulates the rotation range of the gears. For example, Patent Document 1 discloses a damper device having a configuration in which a convex portion provided on a case portion and a convex portion of a holding member are brought into contact with each other to regulate the rotation angle of a drive gear to 360 °.

JP-A-2015-190604

However, in a conventional damper device that regulates the rotation range of a gear, such as the damper device disclosed in Patent Document 1, a force is applied to a regulation portion that regulates the rotation range of the gear, and the regulation portion is damaged. There is.
In particular, an output gear that outputs the driving force of the driving source to the opening / closing member, a transmission gear that transmits the driving force to the output gear, and a regulation unit that regulates the rotation range of the transmission gear when the transmission gear comes into contact with each other. In the configuration having, it is necessary to suppress the damage of the regulation part.

Therefore, an object of the present invention is to prevent damage to the regulating portion that regulates the rotation range of the transmission gear.

The damper device according to the first aspect of the present invention includes a drive source, an opening / closing member that opens / closes by the driving force of the driving source, an output gear that outputs the driving force of the driving source to the opening / closing member, and the driving source. The output gear and the transmission gear are provided with a transmission gear that transmits the driving force of the The transmission gear is configured to rotate in the rotation range from the first position to the second position by restricting the rotation range by the regulation unit. Is characterized in that the rotation of the transmission gear is restricted by contacting the outer peripheral portion of the transmission gear.

The regulating portion of this embodiment is configured to regulate the rotation of the transmission gear by contacting the outer peripheral portion of the transmission gear. Therefore, since the regulating portion can be formed on the outside of the transmission gear, it becomes easy to form the regulating portion in a large and sturdy manner.

The damper device according to the second aspect of the present invention is characterized in that, in the first aspect, the transmission gear has a contact surface with respect to the regulation portion.

According to this aspect, since the transmission gear has a contact surface with respect to the regulating portion, it becomes easy to make surface contact or line contact with the regulating portion, and one point concentration of the force applied to the regulating portion due to point contact with the regulating portion. Can be suppressed.

In the damper device according to the third aspect of the present invention, in the first or second aspect, the regulating portion extends in a direction different from the direction in which the force is received from the transmission gear by coming into contact with the transmission gear. It is characterized by having a first component.

The regulating portion of this embodiment has a first component that extends in a direction different from the direction in which a force is received from the transmission gear when it comes into contact with the transmission gear. Therefore, the force applied to the regulating portion can be dispersed in the direction in which the first component portion extends.

In the damper device according to the fourth aspect of the present invention, in any one of the first to third aspects, the regulating portion extends in a direction of receiving a force from the transmission gear by coming into contact with the transmission gear. It is characterized by having a second component.

The regulating portion of this embodiment has a second component extending in a direction of receiving a force from the transmission gear when it comes into contact with the transmission gear. Therefore, the force applied to the regulation unit can be effectively received by the second component unit.
If a combination structure is provided in which the second component is provided with respect to the first component, the force received from the transmission gear together with the first component can be stably received.

The damper device according to the fifth aspect of the present invention is characterized in that, in any one of the first to fourth aspects, the regulating portion is connected to the wall portion of the accommodating portion.

Since the regulating portion of this embodiment is connected to the wall portion of the accommodating portion, the force applied to the regulating portion can be effectively received by being dispersed also on the wall portion of the accommodating portion.

The damper device according to the sixth aspect of the present invention is characterized in that, in the fifth aspect, the wall portion is an outer peripheral wall of the accommodating portion.

Since the wall portion is the outer peripheral wall of the accommodating portion, it is possible to avoid forming a separate wall portion.

The damper device according to the seventh aspect of the present invention is characterized in that, in the fifth or sixth aspect, the regulating portion is connected to a plurality of locations on the wall portion.

Since the regulating portion of this embodiment is connected to a plurality of locations on the wall portion of the accommodating portion, the force applied to the regulating portion can be effectively received by being dispersed in the plurality of locations on the wall portion of the accommodating portion.

The damper device according to the eighth aspect of the present invention is characterized in that, in the seventh aspect, the regulating portion is ribbed.

Since the regulating portion of this embodiment is rib-shaped, it is possible to suppress deformation of the accommodating portion due to the formation of the regulating portion.

In the damper device according to the ninth aspect of the present invention, in any one of the first to eighth aspects, the contact position with the transmission gear in the restricting portion is a position deviated from the end portion of the restricting portion. It is characterized by being.

When a force is applied to the end of the regulation part, the regulation part is particularly liable to be damaged. However, according to this aspect, the contact position with the transmission gear in the regulating portion is a position deviating from the end portion of the regulating portion. Therefore, damage to the regulating portion can be effectively suppressed.

The damper device according to the tenth aspect of the present invention is characterized in that, in any one of the first to ninth aspects, the regulating portion is integrally molded with the accommodating portion.

Since the regulating portion of this embodiment is integrally molded with the accommodating portion, the regulating portion can be easily formed.

The damper device according to the eleventh aspect of the present invention has a contact portion in any one of the first to tenth aspects, has a common transmission gear and a rotating shaft, and is via the contact portion. The transmission gear includes a rotary gear that transmits the driving force of the drive source to the transmission gear, and the transmission gear has a contacted portion, and the contact portion and the contacted portion come into contact with each other and the contacted portion causes the contacted portion. It is a driven gear that rotates in conjunction with the rotary gear when the contact portion receives a force, and when the contact portion rotates and moves in an interlocking range that is a part of the rotation range of the rotary gear, the contact portion and the said When the contact portion rotates and moves in a non-interlocking range that is out of the interlocking range due to contact with the contacted portion, the contact between the contact portion and the contacted portion is released, and the transmission is performed. It is characterized by including a pressing portion that prevents accompanying rotation by applying a load to the rotation of the gear in the non-interlocking range.

In a configuration in which a transmission gear and a rotary shaft are provided with a common rotary gear, and the transmission gear is a driven gear that rotates in an interlocking range in which the contact portion and the non-contact portion come into contact with each other in conjunction with the rotary gear, the non-interlocking range is contacted. When the part rotates and moves, the transmission gear may rotate with it. However, according to this aspect, since the pressing portion that prevents the accompanying rotation by applying a load to the rotation of the transmission gear in the non-interlocking range is provided, when the contact portion rotates and moves in the non-interlocking range. It is possible to prevent the transmission gear from rotating with it.

In the damper device according to the twelfth aspect of the present invention, in any one of the first to eleventh aspects, the transmission gear is provided with teeth in a part of concentric circles with reference to the rotation axis of the transmission gear. It is characterized in that it has a meshed portion, and the driving force of the drive source is transmitted to the output gear by engaging the meshing portion with the teeth of the output gear.

The transmission gear of this embodiment has a meshing portion in which teeth are provided in a part of concentric circles with reference to the rotation axis of the transmission gear, and the drive source is formed by engaging the meshing portion with the teeth of the output gear. It is configured to transmit the driving force of. By having a transmission gear having such a configuration, it is possible to easily create a state in which the meshing portion of the transmission gear does not mesh with the teeth of the output gear, and it is easy to stop the output gear at a predetermined position. can do.

The damper device according to the thirteenth aspect of the present invention is characterized in that, in any one of the first to twelfth aspects, a reinforcing portion for reinforcing the regulating portion is provided.

According to this aspect, since the reinforcing portion for reinforcing the regulating portion is provided, damage to the regulating portion can be suppressed particularly effectively.

The damper device according to the fourteenth aspect of the present invention is characterized in that, in any one of the first to thirteenth aspects, at least one of the intersections of the two surfaces is chamfered. And.

If the regulating part has a corner, the regulating part is easily damaged from the corner. However, according to this embodiment, even if the regulating part has a corner, the corner is chamfered, so that the regulating part is damaged. It can be effectively suppressed.

The damper device of the present invention can prevent damage to the regulating portion that regulates the rotation range of the transmission gear.

It is a schematic perspective view which shows an example of the apparatus which includes the damper apparatus which concerns on Example 1 of this invention. It is a schematic perspective view which shows the damper device which concerns on Example 1 of this invention. It is an exploded schematic perspective view which shows the damper apparatus which concerns on Example 1 of this invention. It is the schematic which shows the driving force transmission device of the damper device which concerns on Example 1 of this invention. It is a schematic perspective view which shows the driving force transmission device of the damper device which concerns on Example 1 of this invention. It is a partially disassembled schematic perspective view which shows the driving force transmission device of the damper device which concerns on Example 1 of this invention. It is the schematic which shows the driving force transmission device of the damper device which concerns on Example 1 of this invention. It is the schematic which shows the driving force transmission device of the damper device which concerns on Example 1 of this invention. It is a schematic perspective view which shows a part of the driving force transmission device of the damper device which concerns on Example 1 of this invention. It is schematic cross-sectional view which shows a part of the driving force transmission device of the damper device which concerns on Example 1 of this invention. It is a perspective view which shows the transmission gear of the damper device which concerns on Example 1 of this invention. It is a top view which shows the transmission gear of the damper device which concerns on Example 1 of this invention. It is a bottom view which shows the transmission gear of the damper device which concerns on Example 1 of this invention. It is a perspective view which shows the transmission gear of the damper device which concerns on Example 1 of this invention. It is a schematic diagram for demonstrating the operation of each gear in the driving force transmission device of the damper device which concerns on Example 1 of this invention, and the illustration of the regulation part is omitted in each figure of the upper part. It is the schematic which shows the driving force transmission device of the damper device which concerns on Example 2 of this invention. It is a partially disassembled schematic perspective view which shows the driving force transmission device of the damper device which concerns on Example 2 of this invention. It is the schematic which shows the driving force transmission device of the damper device which concerns on Example 2 of this invention. It is the schematic which shows the driving force transmission device of the damper device which concerns on Example 2 of this invention. It is the schematic which shows the driving force transmission device of the damper device which concerns on Example 2 of this invention. It is the schematic which shows the driving force transmission device of the damper device which concerns on Example 2 of this invention. It is a schematic perspective view which shows a part of the driving force transmission device of the damper device which concerns on Example 3 of this invention. It is the schematic which shows a part of the driving force transmission device of the damper device which concerns on Example 3 to Example 5 of this invention. It is the schematic for demonstrating the operation of each gear in the driving force transmission device of the damper device which concerns on a reference example.

The damper device 1 according to an embodiment of the present invention will be described below.
[Example 1] (FIGS. 1 to 15)
First, the outline of the damper device 1 of the first embodiment will be described.
FIG. 1 is a schematic view (partially perspective view) showing a refrigerator 101, which is an example of a device including the damper device 1 of the present embodiment.
2 and 3 are schematic views of the damper device 1 of this embodiment. Of these, FIG. 2 shows a state in which the first frame 3 and the second frame 4 are attached to the driving force transmission device 2. On the other hand, FIG. 3 shows a state in which the first frame 3 and the second frame 4 are removed from the driving force transmission device 2.

As shown in FIG. 1, the damper device 1 of this embodiment can be used in a refrigerator 101 or the like. The refrigerator 101 represented by FIG. 1 including the damper device 1 of the present embodiment includes a refrigerating chamber 102, a freezing chamber 103, and a vegetable compartment 104. In the refrigerator 101, the cold air generated by the cooler 105 is converted into airflow AF by the blower 106, and the refrigerator 101 is connected to the refrigerating chamber 102, the freezing chamber 103, and the vegetable compartment 104 via the damper device 1, another damper device 107, and the damper device 108. It is configured so that airflow AF can be introduced.
However, the device provided with the damper device 1 of this embodiment is not limited to the refrigerator. Further, the configuration of the refrigerator provided with the damper device 1 of this embodiment is not limited to the configuration shown in FIG.

As shown in FIGS. 2 and 3, the damper device 1 of the present embodiment includes a driving force transmitting device 2 and a first frame 3 and a second frame 4 arranged on both sides of the driving force transmitting device 2. ,have. The first frame 3 has an opening 7 and an opening / closing plate 5 that opens and closes the opening 7 by a driving force transmitted by a driving force transmitting device 2. The second frame 4 has an opening 8 and an opening / closing plate 6 that opens and closes the opening 8 by a driving force transmitted by the driving force transmitting device 2.
Here, the direction X is a direction along the arrangement direction of the first frame 3 and the second frame 4 with respect to the driving force transmission device 2 (the + X direction is a direction from the first frame 3 side to the second frame 4 side, and- The X direction is the opposite direction). Further, the direction Y is a direction orthogonal to the direction X and a direction along the opening direction of the opening 7 and the opening 8 (the + Y direction is the direction in which the opening 7 and the opening 8 are opened, and the −Y direction is the direction thereof. In the opposite direction). Further, the direction Z is a direction orthogonal to the direction X and the direction Y (the + Z direction is an upward direction when viewed from the + Y direction with the first frame 3 on the right side and the second frame 4 on the left side, and the −Z direction is the −Z direction. In the opposite direction).

Both the opening / closing plate 5 and the opening / closing plate 6 which are the opening / closing members are provided with a rotation shaft (not shown) at one end, and are configured to be rotatable with reference to the rotation shaft by the driving force transmitted by the driving force transmission device 2. Has been done. Note that FIG. 2 shows a state in which the opening / closing plate 5 is in the open position and the opening / closing plate 6 is in the closed position, and FIG. 3 shows a state in which both the opening / closing plate 5 and the opening / closing plate 6 are in the open position.
In the damper device 1 of the present embodiment, as the opening / closing positions of the opening / closing plate 5 and the opening / closing plate 6, both are in the closed position, one is in the open position and the other is in the closed position, both are in the open position, and one is in the closed position and the other is in the open position. It is possible to take four states. Then, in the refrigerator 101, the airflow AF introduced into the refrigerating chamber 102, the freezing chamber 103 and the vegetable compartment 104 can be adjusted (that is, the refrigerating chamber 102 and the freezing chamber 103) when the damper device 1 takes such four states. And the temperature of the vegetable compartment 104 can be adjusted). In the refrigerator 101 of this embodiment, the opening / closing plate 5 and the opening / closing plate 6 are used in a fully open state (fully open position) or the opening / closing plate 5 and the opening / closing plate 6 are completely closed (fully closed position). In addition to this, it is also possible to use the opening / closing plate 5 and the opening / closing plate 6 in a state where the opening / closing plate 5 and the opening / closing plate 6 are not completely opened, or a state in which the opening / closing plate 5 and the opening / closing plate 6 are not completely closed.

Next, the driving force transmission device 2 which is a main part of the damper device 1 of this embodiment will be described in detail.
Here, FIGS. 4 to 8 are schematic views of the driving force transmission device 2 of the damper device 1 of this embodiment. Of these, FIG. 4 is a schematic view of the driving force transmitting device 2 viewed from a direction along the direction X. 5 and 6 are schematic perspective views of the driving force transmission device 2, and FIG. 6 shows the gear 10 and the gear with respect to the state shown in FIG. 5 in order to make the configurations of the gear 12 and the gear 13 easy to understand. It represents a state in which 11 is floated. FIG. 7 is a schematic view of the driving force transmitting device 2 viewed from the direction along the direction X with the gears 12 and the gears other than the gears 13 removed, and shows the state in which the gears 12 are in the first position. ing. FIG. 8 is a schematic view of the driving force transmitting device 2 viewed from a direction along the direction X with the gears 12 and gears other than the gears 13 removed, and the gear 12 is in the second position. Represents.
Further, FIG. 9 is a schematic view showing a part of the driving force transmission device 2 of the damper device 1 of the present embodiment, and shows a state in which the gear 12 is in the first position.
Further, FIG. 10 is a schematic cross-sectional view showing a part of the driving force transmission device 2 of the damper device 1 of this embodiment.
11 to 14 show a gear 12 which is a transmission gear of the damper device 1 of this embodiment, FIG. 11 is a perspective view, and FIG. 12 is a flat surface in a state of being attached to the driving force transmission device 2. FIG. 13 is a bottom view, and FIG. 14 is a perspective view seen from a direction different from that of FIG.

As shown in FIGS. 4 to 6, the driving force transmission device 2 of this embodiment has a stepping motor 48 as a driving source. The stepping motor 48 has a rotating shaft 16 to which a gear 17 is attached, and has a configuration in which the rotating shaft 16 can rotate in both forward and reverse directions.
The driving force transmission device 2 of this embodiment has a configuration in which a stepping motor 48 is provided as a driving source, but the driving source is not particularly limited. For example, a DC motor or the like may be used instead of the stepping motor 48. good.

Further, the driving force transmission device 2 of this embodiment includes a gear train 9 that decelerates and transmits the rotation of the stepping motor 48 (rotation of the rotation shaft 16). The gear train 9 is composed of a first gear 18, a second gear 21, and a third gear 24. The first gear 18 has a large-diameter gear portion 19 having teeth that mesh with the gear 17, and a small-diameter gear portion 20 provided on the inner peripheral side of the large-diameter gear portion 19.
Further, the second gear 21 has a large-diameter gear portion 22 that meshes with the small-diameter gear portion 20 of the first gear 18, and a small-diameter gear portion 23 provided on the inner peripheral side of the large-diameter gear portion 22. ing.
Further, the third gear 24 has a large-diameter gear portion 25 that meshes with the small-diameter gear portion 23 of the second gear, and a small-diameter gear portion 26 provided on the inner peripheral side of the large-diameter gear portion 25. There is. The gear train 9 of this embodiment has such a configuration, but the configuration of the gear train is not particularly limited.

Further, the driving force transmission device 2 of this embodiment includes a gear 10 that can rotate with respect to the rotation shaft 37. The gear 10 is provided on the outer peripheral portion of the tooth 27 that meshes with the tooth 26, and is provided on the inner peripheral side of the tooth 27 and is provided on a part of the circumferential portion 59 that is a concentric circle based on the rotation shaft 37. It has teeth 28 and. The gear 10 has a contact portion 34 (see FIG. 15), which will be described in detail later, on the side opposite to the side on which the teeth 28 are formed in the direction X.
The driving force transmission device 2 of the present embodiment includes a gear 11 that can rotate with reference to a rotation shaft 30 that is a rotation shaft common to the rotation shaft of the opening / closing plate 5 in the first frame 3. The gear 11 has teeth 29 that are provided on the outer peripheral portion and mesh with the teeth 28. The opening / closing plate 5 rotates in synchronization with the rotational movement of the gear 11.

The gear 11 is a fan-shaped gear, and teeth 29 are formed on the outermost peripheral portion (arc portion) of the fan shape. Further, a contact tooth that abuts on the circumferential portion 59 is provided in a part of the lower side (+ X direction side) of the tooth 29. Specifically, some of the teeth 29 (one or a plurality of teeth on both end sides in the rotational movement direction of the gear 11) are configured to be shorter in the + X direction than the other teeth. Then, a contact tooth having a short outer peripheral length is formed in the lower portion (+ X direction side) of the tooth which is short in the + X direction. Since the gear 11 has such a configuration, when the tooth 28 is in the position where it meshes with the tooth 29, the tooth 28 and the tooth 29 are in contact with each other, and when the tooth 28 is not in the position where it meshes with the tooth 29, the gear 11 is in contact with the tooth 29. The portion of the circumferential portion 59 where the tooth 28 is not formed comes into contact with the corresponding tooth. That is, the gear 11 is restrained and positioned by the tooth 28 when the tooth 28 is in the position where it meshes with the tooth 29, and the tooth 28 in the circumferential portion 59 is formed when the tooth 28 is not in the position where it meshes with the tooth 29. It is constrained and positioned by the part that is not. With such a configuration, the gear 11 always comes into contact with the gear 10, suppresses rattling of the opening / closing plate, and prevents unintended operation.

Further, as shown in FIGS. 6 to 8, the driving force transmitting device 2 of the present embodiment includes a gear 12 that can rotate with reference to a rotating shaft 37 that is a rotating shaft common to the rotating shaft of the gear 10. ing. The gear 12 has teeth 31 provided on a part of concentric circles with respect to the rotating shaft 37, and contacted portions 35 provided on the opposite side of the rotating shaft 37 from the teeth 31. .. Here, the gear 12 is accompanied by the rotation of the gear 10 by pushing the contacted portion 35 in the rotational direction by the contacted portion 34 in a state where the contacted portion 34 (FIG. 15) of the gear 10 is in contact with the contacted portion 35. It is configured to rotate subtly.
The driving force transmission device 2 of the present embodiment includes a gear 13 (fan-shaped gear) that can rotate with reference to a rotation shaft 33, which is a rotation shaft common to the rotation shaft of the opening / closing plate 6 in the second frame 4. There is. The rotary shaft 33 of the gear 13 has the same axial center position as the rotary shaft 30 of the gear 11 in the assembled state. The gear 13 has teeth 32 provided on the outer peripheral portion 38 and meshing with the teeth 31. The teeth 32 are also provided in a part of the circumferential direction, not over the entire circumference. The opening / closing plate 6 rotates in synchronization with the rotational movement of the gear 13.

Here, the gear 12 will be further described. As shown in FIGS. 11 to 14, a part of the small-diameter arc portion 52 forming a part of the outer circumference of the gear 12 has teeth 31 that mesh with the teeth 32 of the gear 13. The teeth 31 transmit the rotation to the gear 13 when the gear 12 rotates integrally with the gear 10. Here, since the rotating shaft 33 of the gear 13 is a rotating shaft common to the rotating shaft of the opening / closing plate 6, the opening / closing plate 6 opens / closes when the gear 13 rotates.

As described above, the gear 12 is configured on the premise that the gear 10 rotates only when the gear 10 moves in the range in which the contact portion 34 pushes the contacted portion 35 in the rotation range of the gear 10. It has become. However, in a range other than the range in which the contact portion 34 pushes the contacted portion 35, the rotational force of the gear 10 is transmitted to the gear 12 via grease (lubricant) interposed between the gear 10 and the gear 12. Therefore, there is a risk that the gear 12 will rotate with it.
Therefore, the driving force transmission device 2 of the present embodiment has a configuration capable of suppressing the accompanying rotation of the gear 12. Specifically, as shown in FIGS. 11 to 14, the gear 12 has a large-diameter arc portion 51 (cam surface) having a long distance from the rotating shaft 37 with respect to the small-diameter arc portion 52 around the gear 12. Prepared for a part of. Then, as shown in FIGS. 7 and 8, the driving force transmitting device 2 includes a pressing portion 36 which is a leaf spring at a position where the large-diameter arc portion 51 and the corner portion 54 described later come into contact with each other.

Here, the gear 12 has a substantially linearly cut shape connecting the large-diameter arc portion 51, the small-diameter arc portion 52, and the large-diameter arc portion 51 and the small-diameter arc portion 52, and has a shape with respect to the regulation portion 15 described later. The flat surface portion 61 forming the contact surface (contact surface) constitutes the outer peripheral portion 38. Further, the small-diameter arc portion 52 and the flat surface portion 61 are smoothly continuous without forming a step, and a square portion 54 is formed between the large-diameter arc portion 51 and the flat surface portion 61. That is, the large-diameter arc portion 51 has two corner portions 54.
It is located between.
The gear 12 is configured such that the large-diameter arc portion 51 is pressed against the pressing portion 36 which is a leaf spring (a load is applied so as not to accompany the gear 10 due to the rotational force of the gear 10), so that the accompaniment is suppressed. It has become. Specifically, when the gear 12 is regulated by the regulating portion 15 (see FIGS. 7 and 8), the corner portion 54 is pressed by the pressing portion 36 to suppress the accompanying rotation. There is. However, the configuration of the pressing portion is not limited to such a leaf spring. As long as a load can be applied to the gear 12, for example, an elastic body such as rubber may be used. Further, instead of bringing the pressing portion into contact with the cam surface of the outer peripheral portion 38, the pressing portion may be brought into contact with the shaft portion constituting the rotating shaft 37.
When the gear 10 is moving within the range in which the contact portion 34 pushes the contacted portion 35 in the rotation range of the gear 10, the contact portion 34 is covered by the contact portion 34 rather than the force that suppresses the rotation of the gear 12. Since the force pushing the contact portion 35 is stronger, the gear 12 rotates with the rotation of the gear 10. At that time, the cam surface (large diameter arc portion 51) slides on the pressing portion 36.

Further, the suppression of the accompanying rotation of the gear 12 will be described in another expression as follows.
As shown in FIG. 11, the gear 12 has a mounting surface on which the gear 10 can be mounted on the upper side (the side in the −X direction on which the gear 10 is mounted) in the axial direction of the rotating shaft 37. 56 is formed, and the contacted portion 35 is configured to extend upward from the flat plate portion 53 of the gear 12 to the upper side of the mounting surface 56. Then, as described above, the gear 12 has a corner portion 54 that prevents accompanying rotation when a load is applied from the pressing portion 36 in a state where the gear 12 is regulated by the regulating portion 15, and the contacted portion 35 has the contact portion 34. It has a large-diameter arc portion 51 that slides on the pressing portion 36 when rotating in contact with the pressing portion 36. The large-diameter arc portion 51 has a curved surface forming an arc, and the large-diameter arc portion 51 passes through the connecting portion of the large-diameter arc portion 51 and the corner portion 54 and the connecting portion of the corner portion 54 and the flat portion 61. Is a surface continuous with the flat surface portion 61.
In the connecting portion of the large-diameter arc portion 51 and the corner portion 54 and the connecting portion of the corner portion 54 and the flat portion 61, the connecting portion of the large-diameter arc portion 51 and the corner portion 54 is located radially outside (rotation axis). The distance from 37 is long). Therefore, the accompanying rotation is prevented by the resistance when the pressing portion 36 tries to get over the corner portion 54.
As shown in FIGS. 11 to 14, the small-diameter arc portion 52 of the flat plate portion 53 has a flat portion 61, a corner portion 54, and a large diameter on the upper side (-X direction side) except for the region where the teeth 31 are formed. The outer peripheral portion 38 is formed together with the arc portion 51, and the lower side (+ X direction side) is generally arcuate (cylindrical). Specifically, as shown in FIG. 12, a relief portion 55 forming an arc of the small-diameter arc portion 52 is formed below the large-diameter arc portion 51. Further, the small-diameter arc portion 52 has teeth 31 only in a part of the circumferential direction.

Here, the gear 13 is a fan-shaped gear, and teeth 32 are formed on the outermost peripheral portion (arc portion) of the fan shape. Further, a contact tooth that abuts on the small-diameter arc portion 52 is provided in a part of the lower side (+ X direction side) of the tooth 32. Specifically, some of the teeth 32 (one or a plurality of teeth on both end sides in the rotational movement direction of the gear 13) are configured to be shorter in the + X direction than the other teeth. Then, a contact tooth having a short outer peripheral length is formed in the lower portion (+ X direction side) of the tooth which is short in the + X direction. Since the gear 13 has such a configuration, when the tooth 31 is in the position where it meshes with the tooth 32, the tooth 31 and the tooth 32 are in contact with each other, and when the tooth 31 is not in the position where it meshes with the tooth 32, the gear 13 is in contact with the tooth 32. The portion of the small-diameter arc portion 52 in which the tooth 31 is not formed comes into contact with the corresponding tooth contact. That is, the gear 13 is restrained and positioned by the tooth 31 when the tooth 31 is in the position where it meshes with the tooth 32, and the tooth 31 in the small diameter arc portion 52 is formed when the tooth 31 is not in the position where it meshes with the tooth 32. It is constrained and positioned by the part that is not. With such a configuration, the gear 13 is always in contact with the gear 12, and rattling of the opening / closing plate can be suppressed, and unintended operation can be prevented.

Then, as shown in FIGS. 4 to 9, the driving force transmission device 2 of this embodiment is an accommodating portion that accommodates a stepping motor 48, a gear train 9, a gear 10, a gear 11, a gear 12, a gear 13, and the like. It has 14. Although the accommodating portion 14 is made of a resin material in this embodiment, it is not limited to this resin material, and it is also possible to make it of another material, for example, a metal material.

Further, as shown in FIGS. 7 to 9, the driving force transmission device 2 of the present embodiment includes a regulation unit 15 that regulates the rotation range of the gear 12 when the gear 12 comes into contact with the gear 12. Specifically, the regulation unit 15 includes two rib-shaped regulation units, a first regulation unit 15a and a second regulation unit 15b, and the first regulation unit 15a regulates the rotation range of the gear 12 at the first position. , The second regulation unit 15b is configured to regulate the rotation range of the gear 12 at the second position.
In this embodiment, the regulation unit 15 (first regulation unit 15a and second regulation unit 15b) is made of the same resin material as the accommodation unit 14 by integral molding with the accommodation unit 14. Of course, the regulating portion 15 (the first regulating portion 15a and the second regulating portion 15b) may be made of a material different from the accommodating portion 14 and may be attached to a predetermined position of the accommodating portion 14 by a fastener.
Since the regulating portion 15 of this embodiment is integrally molded with the accommodating portion 14, it is formed continuously with respect to the wall portion 42 and the surface 14a (bottom surface) of the accommodating portion 14. However, the present invention is not limited to such a configuration, and the configuration is continuously formed only on the wall portion 42 of the accommodating portion 14, the configuration is continuously formed only on the surface 14a, or the surface 14a. It may be configured to be continuously formed only on the surface facing the surface.
As shown in FIG. 9, the gear 12 has an outer peripheral surface 49 on the outer peripheral portion 38, and the rotation range of the gear 12 is restricted by the contact between the side surface 39 of the regulating portion 15 and the outer peripheral surface 49. It has become.

Here, the damper device 1 of this embodiment is once summarized with reference to the second frame 4 side (opening / closing plate 6 side).
The damper device 1 of this embodiment includes a stepping motor 48 as a drive source, an opening / closing plate 6 as an opening / closing member that opens / closes by the driving force of the stepping motor 48, and an output that outputs the driving force of the stepping motor 48 to the opening / closing plate 6. It includes a gear 13 as a gear. Further, a gear 12 as a transmission gear that transmits the driving force of the stepping motor 48 to the gear 13, a regulation unit 15 that regulates the rotation range of the gear 12 by contact with the gear 12, and a regulation unit 15 are provided. A housing unit 14 for accommodating the 13 and the gear 12 is provided. The gear 12 is configured to rotate in a rotation range from the first position to the second position by restricting the rotation range by the regulation unit 15.
In the damper device 1 of the present embodiment, the first position corresponds to the fully open position of the opening / closing plate 6, and the second position corresponds to the fully closed position.

Here, as described above, the damper device 1 of the present embodiment is configured as the regulation unit 15 separately from the first regulation unit 15a that regulates the rotation of the gear 12 at the first position and the first regulation unit 15a. It also includes a second regulating unit 15b that regulates the rotation of the gear 12 at the second position. Therefore, the damper device 1 of the present embodiment can disperse the force applied to the regulating unit 15 between the case where the rotation of the gear 12 is regulated at the first position and the case where the rotation of the gear 12 is regulated at the second position, and is regulated. It is possible to prevent the portion 15 from being damaged.
As shown in FIG. 10, "separately configured" means a contact portion 60 (in this embodiment, the first configuration portion 15a'and the first configuration described later) with which the outer peripheral portion 38 of the gear 12 abuts. It has a portion (corresponding to a portion where the outer peripheral portion 38 of the gear 12 in contact with the portion 15b'is in contact), and the corresponding contact portion 60 is independent on the surface 14a of the accommodating portion 14 on the side where the regulation portion 15 is provided. means. However, if the abutting portions 60 of the two regulating portions 15 are not connected to each other, it means that the configuration in which the two regulating portions 15 are connected to each other (see, for example, the rib 50 represented by the broken line in FIG. 10) is also included.

Here, as shown in FIGS. 7 and 9, the first regulation unit 15a has a first configuration extending in a direction (direction E) different from the direction F1 that receives a force from the gear 12 by coming into contact with the gear 12. It has a portion 15a'. Further, as shown in FIG. 8, the second regulating portion 15b has a first component portion 15b'extending in a direction different from the direction F2 for receiving the force received from the gear 12 by coming into contact with the gear 12. ing. Therefore, in the damper device 1 of the present embodiment, the force applied to the regulation unit 15 (first regulation unit 15a and second regulation unit 15b) is distributed in the direction in which the first component unit 15a'and the first component unit 15b' extend. can do.

Further, as shown in FIGS. 7 and 9, the first regulating portion 15a has a second component portion 15a'' extending in the direction F1 in which a force is received from the gear 12 by coming into contact with the gear 12. .. Further, as shown in FIG. 8, the second regulating portion 15b has a second component portion 15b'' extending in the direction F2 for receiving the force received from the gear 12 by coming into contact with the gear 12. Therefore, in the damper device 1 of the present embodiment, the force applied to the regulation unit 15 (the first regulation unit 15a and the second regulation unit 15b) is effectively applied to the second component 15a ″ and the second component 15b ″. Can be taken in.
Note that "extending in the direction of receiving a force from the gear 12 by contacting the gear 12" does not have to be a configuration in which the force is strictly received (for example, direction F1), and is generally in the direction of receiving the force (for example, direction F1). It means that the configuration extends in the direction F2) of this embodiment. Specifically, for example, a configuration extending in a direction having an angle of ± 90 degrees or less with respect to a direction receiving a force, more preferably a configuration extending in a direction having an angle of ± 45 degrees or less, and the like are applicable.
Further, "extending in a direction different from the direction in which the force is received from the gear 12" means that when the gear 12 and the regulating portion 15 come into surface contact with each other at a portion receiving the force from the gear 12, the configuration extends in a direction along the surface. And, it means to include a structure extending in a direction almost along the surface.

In other words, the first regulation unit 15a of this embodiment is a first component unit that comes into contact with the gear 12 and extends in a direction different from the direction F1 that receives a force from the gear 12 by contacting the gear 12. It has a 15a'and a second component 15a'' extending in the direction F1 in which a force is received from the gear 12 when the first component 15a' comes into contact with the gear 12. Further, as shown in FIG. 8, the second regulating unit 15b has a first configuration extending in a direction different from the direction F2 that contacts the gear 12 and receives the force received from the gear 12 by contacting the gear 12. It has a portion 15b'and a second constituent portion 15b'' extending in the direction F2 for receiving the force received from the gear 12 when the first constituent portion 15b'contacts the gear 12.
Therefore, the force applied to the regulation unit 15 (the first regulation unit 15a and the second regulation unit 15b) can be dispersed in the direction in which the first component unit 15a'and the first component unit 15b' extend, and the regulation unit 15 The force applied to the second component 15a'' and the second component 15b'' can be effectively received. Therefore, the damper device 1 of this embodiment can prevent the regulation unit 15 from being damaged.

Further, as described above, in the regulation unit 15 (first regulation unit 15a and second regulation unit 15b) of the present embodiment, the outer peripheral portion 38 of the gear 12 becomes the first configuration unit 15a'and the first configuration unit 15b'. It is configured to regulate the rotation of the gear 12 by switching and contacting.
By making the regulation portion 15 and the outer peripheral portion 38 of the gear 12 come into contact with each other, the regulation portion 15 can be formed on the outside of the gear 12, so that the regulation portion 15 can be easily formed large and sturdy, and the regulation portion 15 is regulated. The accommodating portion 14 can also be made sturdy by forming the portion 15 into a beam shape or the like.
The regulation unit 15 of the present embodiment is contacted by the "outer peripheral portion 38 of the gear 12 with reference to the rotating shaft 37 of the gear 12" being switched to the first component portion 15a'and the first component portion 15b'. It is configured to regulate the rotation of the gear 12. Therefore, by configuring the regulating portion 15 and the gear 12 in such a configuration, it is possible to set a long distance from the rotating shaft 37 of the gear 12 to the contact position between the regulating portion 15 and the gear 12. (See distance L1 in FIG. 15 and distance L2 in FIG. 24). That is, the stress applied from the gear 12 to the regulating portion 15 can be relaxed. As a result, the damper device 1 of the present embodiment can particularly effectively prevent the regulation unit 15 from being damaged. Although the regulation unit 15 of this embodiment has such a configuration, the “outer peripheral portion” is not necessarily limited to the outer peripheral portion of the gear 12 with reference to the rotation shaft 37 of the gear 12. For example, two regulating portions 15 are formed on the surface of the accommodating portion 14 facing the surface 14a, and the surface 57 on the mounting surface 56 side of the flat plate portion 53 is provided with a contact member that comes into contact with these two regulating portions 15. And so on.

Further, as described above, in the gear 12 of the present embodiment, the outer peripheral surface 49, which is the contact surface with respect to the regulation portion 15 (specifically, the first constituent portion 15a'and the first constituent portion 15b'), is changed to the outer peripheral portion 38. Have. In other words, the outer peripheral portion 38 of the gear 12 is configured as a surface-shaped contact surface at least at a portion that comes into contact with the regulation portion 15. Therefore, the damper device 1 of the present embodiment facilitates surface contact or line contact with the regulation unit 15, and suppresses the concentration of the force applied to the regulation unit 15 due to the point contact with the regulation unit 15. It is configured so that it can be used.
Here, it is preferable that the side surface 39 (FIG. 9) of the regulating portion 15 is also formed in a surface shape at least at a portion that comes into contact with the outer peripheral portion 38 of the gear 12. With this configuration, the outer peripheral portion 38 and the restricting portion 15 of the gear 12 both have surface contact with each other in a surface shape, and the concentration of the force at one point can be further suppressed.

Further, as a supplement, as shown in FIG. 12, in the first regulation portion 15a of the present embodiment, a relief portion 58 is formed at an end portion of the first configuration portion 15a'on the second configuration portion 15a'' side. ing. The relief portion 58 of the first component portion 15a'is a portion configured to move away (escape) from the gear 12 toward the end on the second component 15a'' side, and avoid contact with the gear 12. It is a part that is configured as. The first regulating portion 15a is configured to have a relief portion 58 so that the end portion does not come into contact with the gear 12.

Further, as described above, the gear 12 (flat plate portion 53) has a columnar shape on the lower side (+ X direction side) except for the tooth 31 forming region, but the upper side (−X direction side) is a cam surface. It has a large-diameter arc portion 51 and is not columnar. As shown in FIG. 14, the lower side of the gear 12 (flat plate portion 53) has a relief portion 55 of an arc portion, and the upper side and the lower side of the gear 12 are not continuous. That is, it has a flat surface portion 61 which is a contact surface provided radially outside the tooth tip circle (arc of the small diameter arc portion 52) which is the outer diameter on which the tooth 31 is formed, and has the same shape as the tooth tip circle. It has a cam surface (large-diameter arc portion 51) having a different center from the tooth tip circle, and a straight line portion connecting the tooth tip circle to the cam surface is used as a contact surface. In other words, instead of cutting out the side part from the circular component, a protruding part (cam surface) is provided on the circular component, and the circular part and the cam surface are connected by a straight line, and the straight part is formed. Is configured as a contact surface.

Here, as shown in FIGS. 7 to 9, the first regulating portion 15a is connected to the wall portion 42 (specifically, the wall portion 42a and the wall portion 42b) of the accommodating portion 14, and the second regulating portion The 15b is connected to the wall portion 42 (specifically, the wall portion 42c) of the accommodating portion 14. In this embodiment, the first regulating portion 15a and the second regulating portion 15b are made of the same resin material as the accommodating portion 14, and have a structure firmly connected to the wall portion 42 by being integrally molded with the accommodating portion 14. Of course, the first regulating portion 15a and the second regulating portion 15b may be formed separately from the accommodating portion 14 and connected to the wall portion 42 by a fastener.
As described above, in the damper device 1 of the present embodiment, since the regulating portion 15 is connected to the wall portion 42 of the accommodating portion 14, the force applied to the regulating portion 15 can be dispersed to the wall portion 42 of the accommodating portion 14. Therefore, the applied force can be effectively received.
In addition, the "wall portion 42 of the accommodating portion 14" specifically means the wall portion 42 of the accommodating portion 14 in the direction intersecting the direction in which the rotation shaft 37 of the gear 12 extends (the direction intersecting the direction X). do.
Here, in the present embodiment, the regulating portion 15 is configured to be connected to the wall portion 42 as the outer peripheral wall of the accommodating portion 14, and the force applied to the regulating portion 15 can be effectively received without separately forming the wall portion. It is configured. However, the present invention is not limited to such a configuration, and a wall portion is formed separately from the outer peripheral wall of the accommodating portion 14 (for example, formed on a surface 14a of the accommodating portion 14 or a surface facing the surface 14a), and the regulating portion 15 is formed. It may be configured to be connected to the wall portion.

Further, as described above, the first regulating portion 15a is connected to a plurality of locations (wall portion 42a and wall portion 42b) of the wall portion 42. As a result, the damper device 1 of the present embodiment can effectively receive the force applied to the regulating portion 15 by being dispersed at a plurality of locations of the wall portions 42 of the accommodating portion 14.
In the damper device 1 of the present embodiment, only the first regulating portion 15a is connected to a plurality of wall portions 42, but the second regulating portion 15b is also connected to a plurality of wall portions 42. Is more preferable.

Further, as shown in FIGS. 7 to 9 and the like, the regulation unit 15 of this embodiment is rib-shaped. Here, when the regulating portion 15 is formed in the accommodating portion 14, the accommodating portion 14 is deformed due to a sink mark in the accommodating portion 14 due to a difference in thickness between the accommodating portion 14 and the regulating portion 15. There is a risk. However, since the regulating portion 15 of this embodiment is ribbed, the housing portion 14 can be suppressed from being deformed due to the formation of the regulating portion 15.

Further, as shown in FIG. 9, in the damper device 1 of the present embodiment, the contact position 41 of the regulation unit 15 (specifically, the first regulation unit 15a) with the gear 12 is the regulation unit 15 (specifically, the first regulation unit 15a). Is located at a position deviated from the end 40 of the first component 15a') in the first regulation part 15a. When a force is applied to the end 40 of the regulation portion 15, the regulation portion 15 is particularly liable to be damaged. However, in the damper device 1 of the present embodiment, the contact position 41 of the regulation portion 15 with the gear 12 is the end of the regulation portion 15. It is in a position off the part 40. Therefore, the damper device 1 of this embodiment can effectively suppress the damage of the regulation unit 15.
In the embodiment shown in FIG. 9, the "end 40 of the regulating portion 15" is a direction that intersects both the direction in which the rotating shaft 37 of the gear 12 extends and the direction F1 in which the force is received from the gear 12 (that is,). It means the end portion of the regulation portion 15 in the direction E) in FIG. The "position deviated from the end 40 of the regulation unit 15" corresponds to, for example, a position that does not come into contact with the end 40 of the regulation unit 15.
The "position deviated from the end 40 of the regulation unit 15" is generalized and defined below, apart from the structure of the embodiment shown in FIG.
As described above, the "end of the regulating portion" is a concept for explaining the portion where the regulating portion 15 receives a force from the gear 12. That is, the "position deviated from the end of the regulating portion" means that in the regulating portion 15 formed in a certain shape, the portion that is easily damaged by the force from the gear 12 is removed, and the force is applied to the portion that is not easily damaged. Means to configure to receive. Specifically, for example, when the portion where the regulating portion 15 contacts the gear 12 (for example, the side surface 39 of the regulating portion 15) has a surface or a side, the intermediate portion of the surface or the side corresponds to the portion.

Further, in the damper device 1 of the present embodiment, as described above, both the accommodating portion 14 and the restricting portion 15 are made of resin, and the regulating portion 15 is integrally molded with the accommodating portion 14. .. Therefore, in the damper device 1 of this embodiment, the regulation unit 15 can be easily provided. Further, in the damper device 1 of the present embodiment, the first regulating portion 15a and the second regulating portion 15b are structurally formed because they are made of a resin material and are integrally molded with the accommodating portion 14 to be connected to the wall portion 42. Is strong.
As described above, in the damper device 1 of the present embodiment, since the regulating portion 15 is connected to the wall portion 42 of the accommodating portion 14, the force applied to the regulating portion 15 can be dispersed to the wall portion 42 of the accommodating portion 14. Therefore, the applied force can be effectively received.
However, the present invention is not limited to such a configuration, and the regulating portion 15 may not be integrally molded with the accommodating portion 14, or the restricting portion 15 and the accommodating portion 14 may be formed of different materials.
As described above, since the regulating portion 15 of this embodiment is integrally molded with the accommodating portion 14, it is continuously formed on the wall portion 42 and the surface 14a of the accommodating portion 14. However, the present invention is not limited to such a configuration, and the configuration is continuously formed only on the wall portion 42 of the accommodating portion 14, or is continuously formed only on the surface 14a, or the surface 14a. The configuration may be such that it is continuously formed only on the surfaces on the opposite sides.

Further, as shown in FIG. 9, both the first regulation portion 15a and the second regulation portion 15b of this embodiment have corner portions 47, but these corner portions 47 are chamfered. In other words, the regulatory unit 15 has chamfered at least one of the intersections of the two surfaces. In this embodiment, all the corners 47 are chamfered. As described above, when the regulating portion 15 has the corner portion 47, it is preferable that the corner portion 47 is chamfered.
When the regulating portion 15 has a corner portion 47, the regulating portion 15 is easily damaged from the corner portion 47, but even if the regulating portion 15 has a corner portion 47 as in the damper device 1 of the present embodiment, the corner portion 47 is present. This is because if chamfered, damage to the regulating portion 15 can be effectively suppressed.
In addition, "the corner portion 47 is chamfered" means that the corner portion 47 is chamfered in a plane shape and the corner portion 47 is a curved surface shape (for example, a round shape like the corner portion 47 of the present embodiment). It means that it includes the case where it is chamfered.

Further, as shown in FIGS. 6 to 9, the gear 12 of the present embodiment has a meshing portion 46 in which teeth 31 are provided in a part of concentric circles with reference to the rotation shaft 37 of the gear 12. .. The meshing portion 46 is meshed with the teeth 32 of the gear 13 to transmit the driving force of the stepping motor 48 to the gear 13. By having the gear 12 having such a configuration, the damper device 1 of the present embodiment can easily create a state in which the meshing portion 46 of the gear 12 does not mesh with the teeth 32 of the gear 13. Therefore, it is easy to stop the gear 13 at a predetermined position (that is, keep the opening / closing plate 6 in the open position or the closed position).
As described above, the small-diameter arc portion 52 of the flat plate portion 53 has the outer peripheral portion 38 together with the flat portion 61, the square portion 54, and the large-diameter arc portion 51 on the upper side (-X direction side) except for the region where the teeth 31 are formed. However, the lower side (+ X direction side) is generally arcuate (cylindrical). Further, the small-diameter arc portion 52 has teeth 31 only in a part of the circumferential direction. As described above, the gear 13 is a fan-shaped gear, and the teeth 32 are formed on the outermost peripheral portion (arc portion) of the fan shape. Further, a contact tooth that abuts on the small-diameter arc portion 52 is provided in a part of the lower side (+ X direction side) of the tooth 32. With such a configuration, the gear 13 is restrained and positioned by the tooth 31 when the tooth 31 is in the position where it meshes with the tooth 32, and has a small diameter when the tooth 31 is not in the position where it meshes with the tooth 32. The arc portion 52 is constrained and positioned by the portion where the teeth 31 are not formed. With such a configuration, the gear 13 is always in contact with the gear 12, and rattling of the opening / closing plate can be suppressed, and unintended operation can be prevented.

Next, the rotation of the gear 11 and the gear 12 accompanying the rotation of the gear 10 and the rotation of the gear 13 accompanying the rotation of the gear 12 will be described.
FIG. 15 is a schematic view for explaining the operation of each gear in the driving force transmission device 2 of the damper device 1 of this embodiment.
Further, FIG. 24 is a schematic view for explaining the operation of each gear in the driving force transmission device of the damper device of the reference example. Note that FIG. 24 shows a part of the gear 212 as a transmission gear corresponding to the gear 12 of this embodiment as a perspective view so that the configuration of the regulation unit 15 (regulation unit 15e) can be easily understood. In the damper device of the reference example, the gear 212 is formed with a groove-shaped passage 260 for one regulating portion 15e. Then, when the gear 212 is rotated, the regulating portion 15e comes into contact with the end of the passage 260, so that the rotation of the gear 212 is restricted.

As shown in FIG. 15, in the damper device 1 of the present embodiment, at the closed-closed origin position where both the opening / closing plate 5 and the opening / closing plate 6 are in the closed position, the teeth 28 of the gear 10 are relative to the gear 11. It is located on the opposite side of the rotating shaft 37. In this state, the gear 12 is in a position where the tooth 31 is rotated by 120 ° in the clockwise direction CW with respect to the tooth 28 of the gear 10. Here, the arrangement of the gear 11 in the closed-closed origin position corresponds to the state in which the opening / closing plate 5 is in the closed position, and the arrangement of the gear 13 in the closed-closed origin position corresponds to the state in which the opening / closing plate 6 is in the closed position. ing.
Here, in the damper device 1 of the present embodiment, the first position corresponds to the fully open position of the opening / closing plate 6, and the second position corresponds to the fully closed position. When the first position and the second position correspond to FIG. 15, the first position (fully open position of the opening / closing plate 6) is the open-open origin position, the open-open stop position, and the close-open stop position (right side of FIG. 15). Corresponding to 3), the gear 12 comes into contact with the first regulating portion 15a. On the other hand, the second position (fully closed position of the opening / closing plate 6) corresponds to the closed-closed origin position, the closed-closed stop position and the open-closed stop position (three on the left side in FIG. 15), and the gear 12 is the second position. It comes into contact with the regulating portion 15b.

By driving the stepping motor 48 from the closed-closed origin position and transmitting the driving force to the gear 10 via the gear train 9, when the gear 10 is rotated by 120 ° in the clockwise direction CW, the closed-closed stop position is obtained. It becomes. From the closed-closed origin position to the closed-closed stop position, the teeth 28 of the gear 10 do not come into contact with the teeth 29 of the gear 11. That is, the gear 10 and the gear 11 do not engage with each other from the closed-closed origin position to the closed-closed stop position. Further, from the closed-closed origin position to the closed-closed stop position, the contact portion 34 of the gear 10 does not come into contact with the contacted portion 35 of the gear 12. That is, the gear 10 and the gear 12 do not engage with each other from the closed-closed origin position to the closed-closed stop position. Therefore, from the closed-closed origin position to the closed-closed stop position, neither the gear 11 nor the gear 13 rotates (rotates), and neither the opening / closing plate 5 nor the opening / closing plate 6 changes in state. Therefore, in the closed-closed stop position, both the opening / closing plate 5 and the opening / closing plate 6 are in the closed position.

When the stepping motor 48 is further driven from the closed-closed stop position and the driving force is further transmitted to the gear 10 via the gear train 9, the gear 10 is further rotated by 120 ° in the clockwise direction CW to open-. It becomes the closed stop position. From the closed-closed stop position to the open-closed stop position, the teeth 28 of the gear 10 and the teeth 29 of the gear 11 come into contact with each other, and the gear 11 rotates in the counterclockwise direction CCW. That is, between the closed-closed stop position and the open-closed stop position, the gear 10 and the gear 11 engage with each other, and the gear 11 rotates and moves in the counterclockwise direction CCW. On the other hand, between the closed-closed stop position and the open-closed stop position, the contact portion 34 of the gear 10 does not come into contact with the contacted portion 35 of the gear 12 (only when the open-closed stop position is reached, the contact portion 34 and the contact portion 34 are covered. The contact portion 35 comes into contact with the contact portion 35). That is, the gear 10 and the gear 12 do not engage with each other from the closed-closed stop position to the open-closed stop position. Therefore, from the closed-closed stop position to the open-closed stop position, the gear 11 rotates to open the opening / closing plate 5, and the gear 13 does not rotate (the state of the opening / closing plate 6 does not change). .. Therefore, in the open-closed stop position, the opening / closing plate 5 is in the open position and the opening / closing plate 6 is in the closed position.

When the stepping motor 48 is further driven from the open-closed stop position and the driving force is further transmitted to the gear 10 via the gear train 9, the gear 10 is further rotated by 120 ° in the clockwise direction CW to open-. It becomes the open origin position. From the open-closed stop position to the open-open origin position, the teeth 28 of the gear 10 and the teeth 29 of the gear 11 do not come into contact with each other. That is, the gear 10 and the gear 11 do not engage with each other from the open-closed stop position to the open-open origin position. On the other hand, between the open-closed stop position and the open-open origin position, the contact portion 34 of the gear 10 and the contacted portion 35 of the gear 12 come into contact with each other, and the gear 12 rotates in the clockwise direction CW. Further, when the teeth 31 of the gear 12 mesh with the teeth 32 of the gear 13, the gear 13 rotates in the counterclockwise direction CCW. That is, the gear 10 and the gear 12, and the gear 12 and the gear 13 are engaged between the open-closed stop position and the open-open origin position. Therefore, the gear 11 does not rotate (the state of the opening / closing plate 5 does not change) from the open-closed stop position to the open-open origin position, but the gear 13 rotates and the opening / closing plate 6 is opened. go. Therefore, at the open-open origin position, both the opening / closing plate 5 and the opening / closing plate 6 are in the open position.

By driving the stepping motor 48 from the open-open origin position and transmitting the driving force to the gear 10 via the gear train 9, this time, when the gear 10 is rotated by 120 ° in the counterclockwise direction CCW, it opens. -Open stop position. From the open-open origin position to the open-open stop position, the teeth 28 of the gear 10 do not come into contact with the teeth 29 of the gear 11. That is, the gear 10 and the gear 11 do not engage with each other from the open-open origin position to the open-open stop position. Further, the contact portion 34 of the gear 10 does not come into contact with the contacted portion 35 of the gear 12 from the open-open origin position to the open-open stop position. That is, the gear 10 and the gear 12 do not engage with each other from the open-open origin position to the open-open stop position. Therefore, from the open-open origin position to the open-open stop position, neither the gear 11 nor the gear 13 rotates (rotates), and neither the opening / closing plate 5 nor the opening / closing plate 6 changes in state. Therefore, in the open-open stop position, both the opening / closing plate 5 and the opening / closing plate 6 are in the open position.

From the open-open stop position, the stepping motor 48 is further driven to further transmit the driving force to the gear 10 via the gear train 9, and the gear 10 is further rotated by 120 ° in the counterclockwise direction CCW to close. -Open stop position. From the open-open stop position to the closed-open stop position, the teeth 28 of the gear 10 and the teeth 29 of the gear 11 come into contact with each other, and the gear 11 rotates in the clockwise direction CW. That is, between the open-open stop position and the close-open stop position, the gear 10 and the gear 11 engage with each other, and the gear 11 rotates in the clockwise direction CW. On the other hand, between the open-open stop position and the closed-open stop position, the contact portion 34 of the gear 10 does not come into contact with the contacted portion 35 of the gear 12 (only when the closed-open stop position is reached, the contact portion 34 and the contact portion 34 are covered. Contact with the contact portion 35). That is, the gear 10 and the gear 12 do not engage with each other from the open-open stop position to the closed-open stop position. Therefore, from the open-open stop position to the close-open stop position, the gear 11 rotates to close the opening / closing plate 5, and the gear 13 does not rotate (the state of the opening / closing plate 6 does not change). .. Therefore, in the closed-open stop position, the opening / closing plate 5 is in the closed position and the opening / closing plate 6 is in the open position.

Then, from the closed-open stop position, the stepping motor 48 is further driven and the driving force is further transmitted to the gear 10 via the gear train 9, so that the gear 10 is further rotated by 120 ° in the counterclockwise direction CCW. And closed-closed origin position. From the closed-open stop position to the closed-closed origin position, the teeth 28 of the gear 10 and the teeth 29 of the gear 11 do not come into contact with each other. That is, the gear 10 and the gear 11 do not engage with each other from the closed-open stop position to the closed-closed origin position. On the other hand, between the closed-open stop position and the closed-closed origin position, the contact portion 34 of the gear 10 and the contacted portion 35 of the gear 12 come into contact with each other, and the gear 12 rotates in the counterclockwise direction CCW. Further, when the teeth 31 of the gear 12 mesh with the teeth 32 of the gear 13, the gear 13 rotates in the clockwise direction CW. That is, the gear 10 and the gear 12, and the gear 12 and the gear 13 are engaged between the closed-open stop position and the closed-closed origin position. Therefore, the gear 11 does not rotate (the state of the opening / closing plate 5 does not change) from the closed-open stop position to the closed-closed origin position, but the gear 13 rotates and the opening / closing plate 6 is closed. go. Therefore, at the closed-closed origin position, both the opening / closing plate 5 and the opening / closing plate 6 are in the open position.

Here, between the closed-closed origin position and the open-closed stop position via the closed-closed stop position, and between the open-open origin position and the closed-open stop position via the open-open stop position. Does not engage the gear 10 and the gear 12. That is, it is assumed that the gear 12 does not rotate between them. The damper device 1 of the present embodiment includes a pressing portion 36 (FIGS. 7, 8, and 15) for suppressing the gear 12 from being affected by the rotation of the gear 10 and rotating around between them. .. When the pressing portion 36 is pressed against the gear 12, the gear 12 is affected by the rotation of the gear 10 and is not rotated. Although the pressing portion 36 of this embodiment is a leaf spring made of metal, the pressing portion 36 is not limited to the pressing portion having such a configuration, and for example, an elastic body such as rubber can be used.

As described above, the gear 12 is configured on the premise that the gear 10 rotates only when the gear 10 moves in the range in which the contact portion 34 pushes the contacted portion 35 in the rotation range of the gear 10. It has become. However, in a range other than the range in which the contact portion 34 pushes the contacted portion 35, the rotational force of the gear 10 is transmitted to the gear 12 via grease (lubricant) interposed between the gear 10 and the gear 12. Therefore, there is a risk that the gear 12 will rotate with it. This is because the gear 12 rotates following the rotation of the gear 10 due to the viscous resistance and sliding resistance of the grease interposed between the gear 10 and the gear 12.
Therefore, as described above, in the damper device 1 of the present embodiment, a load is applied to the gear 12 by bringing the corner portion 54 into contact with the pressing portion 36 in a state where the contact portion 34 and the contacted portion 35 do not come into contact with each other. , The gear 12 is prevented from rotating with the rotation of the gear 10.

As described above, the damper device 1 of the present embodiment has the contact portion 34, the gear 12 and the rotating shaft 37 are common, and the driving force of the stepping motor 48 is transmitted to the gear 13 via the contact portion 34. A gear 10 as a rotary gear is provided. Further, the gear 12 has a contacted portion 35, and the contacted portion 34 and the contacted portion 35 come into contact with each other, and the contacted portion 35 receives a force from the contacted portion 34 to rotate in conjunction with the gear 10. It is a gear.
Further, as shown in FIG. 15, an interlocking range that is a part of the rotation range of the gear 10 (between the open-close stop position and the open-open origin position, and from the close-open stop position to the close-close). When the contact portion 34 rotates and moves through the origin position), the contact portion 34 and the contacted portion 35 come into contact with each other, and the non-interlocking range (from the closed-closed origin position to the open-closed stop position) outside the interlocking range. When the contact portion 34 rotates and moves between the open-open origin position and the closed-open stop position), the contact between the contact portion 34 and the contacted portion 35 is released. There is. Further, it is provided with a pressing portion 36 that prevents accompanying rotation by applying a load to the rotation of the gear 12 in the non-interlocking range.
Like the damper device 1 of this embodiment, the transmission gear (gear 12) and the rotary shaft (rotary shaft 37) are provided with a common rotary gear (gear 10), and the transmission gear (gear 12) is a rotary gear (gear 10). In a configuration in which the driven gear rotates in an interlocking range in which the contact portion 34 and the contacted portion 35 come into contact with each other, the transmission gear accompanies the contact portion 34 when the contact portion 34 rotates in the non-interlocking range. In some cases. This is because a frictional force is generated between the gear 10 and the gear 12. However, since the damper device 1 of the present embodiment includes the pressing portion 36 that is pressed against the gear 12, the gear 12 will accompany the contact portion 34 when the contact portion 34 rotates and moves in the non-interlocking range. It is configured to be able to suppress.

As can be seen by comparing FIGS. 15 and 24, the operation of each gear of the damper device of the reference example shown in FIG. 24 is the same as the operation of each corresponding gear of the damper device 1 of this embodiment. be. Specifically, the gear 10 and the gear 210 at each of the closed-closed origin position, the closed-closed stop position, the open-closed stop position, the open-open origin position, the open-open stop position and the closed-open stop position. The positions, the positions of the gear 11 and the gear 211, the positions of the gear 12 and the gear 212, and the positions of the gear 13 and the gear 213 are the same.

Here, the position of the gear 12 of the damper device 1 of the present embodiment is regulated by the second regulating portion 15b at the closed-closed origin position, the closed-closed stop position, and the open-closed stop position, and the open-open origin position. In the open-open stop position and the closed-open stop position, the position is regulated by the regulation unit 15 (first regulation unit 15a) different from the second regulation unit 15b. On the other hand, the gear 212 of the damper device of the reference example is at any of the closed-closed origin position, the closed-closed stop position, the open-closed stop position, the open-open origin position, the open-open stop position and the closed-open stop position. The position is regulated by the same regulation unit 15 (regulation unit 15e). Therefore, since the damper device 1 of the present embodiment can disperse the force applied to the regulation unit 15 from the transmission gear corresponding to the gear 12 and the gear 212, damage to the regulation unit 15 can be suppressed as compared with the damper device of the reference example. It is configured. Further, since the outer peripheral portion 38 of the gear 12 is configured to be in contact with the regulation portion 15, the distance L1 from the rotating shaft 37 of the gear 12 to the contact position between the regulation portion 15 and the gear 12 is shown in FIG. 24. The distance can be set longer than the distance L2 in the damper device of the reference example. Therefore, as compared with the damper device of the reference example, the configuration is such that damage to the regulation unit 15 can be suppressed.

Next, an example of a damper device having a configuration different from that of the damper device of the first embodiment will be described.
[Example 2] (FIGS. 16 to 21)
16 to 21 are schematic views showing the driving force transmission device 2 of the damper device of the second embodiment. Of these, FIGS. 18 to 21 show some components omitted in order to make the internal configuration easy to understand. Further, FIG. 16 is a diagram corresponding to FIG. 4 of the driving force transmission device 2 of the first embodiment. Further, FIG. 17 is a diagram corresponding to FIG. 6 of the driving force transmission device 2 of the first embodiment. Further, FIG. 20 is a diagram corresponding to FIG. 7 of the driving force transmission device 2 of the first embodiment. Further, FIG. 21 is a diagram corresponding to FIG. 8 of the driving force transmission device 2 of the first embodiment. The components common to those in the first embodiment are indicated by the same reference numerals, and detailed description thereof will be omitted.
The damper device of the present embodiment has the same configuration as the damper device 1 of the first embodiment except for the driving force transmission device 2.

As shown in FIGS. 16 to 21, the driving force transmission device 2 of the present embodiment has the same configuration as the driving force transmission device 2 of the first embodiment except for the configuration of the regulation unit 15, such as the configuration of each gear. Is.
As shown in FIGS. 19 to 21, the regulation unit 15 of this embodiment is composed of a first regulation unit 15c and a second regulation unit 15d. Although the regulation unit 15 (first regulation unit 15c and second regulation unit 15d) of this embodiment is not configured to be connected to the wall portion 42 of the accommodation unit 14, sufficient space cannot be secured inside the accommodation unit 14. In the case of a configuration or the like, the formation of the regulation unit 15 can be facilitated by such a configuration.

[Examples 3 to 5] (FIGS. 22 to 23)
FIG. 22 is a schematic view showing a part of the driving force transmitting device 2 of the damper device of the third embodiment, and is a diagram corresponding to FIG. 9 of the driving force transmitting device 2 of the first embodiment. Further, FIG. 23 is a schematic view showing a part of the driving force transmission device 2 of the third to fifth embodiments. Of these, FIG. 23A is a partial cross-sectional view of the driving force transmission device 2 of the third embodiment as viewed from the direction D in FIG. 22. Further, FIG. 23 (b) is a partial cross-sectional view of the driving force transmitting device 2 of the fourth embodiment, and corresponds to FIG. 23 (a) which is a partial cross-sectional view of the driving force transmitting device 2 of the third embodiment. It is a figure. 23 (c) is a partial cross-sectional view of the driving force transmitting device 2 of the fifth embodiment, and corresponds to FIG. 23 (a) which is a partial cross-sectional view of the driving force transmitting device 2 of the third embodiment. It is a figure. The components common to those of the first and second embodiments are indicated by the same reference numerals, and detailed description thereof will be omitted.
The damper devices of Examples 3 to 5 have the same configuration as the damper devices of Example 1 except for the driving force transmission device 2.

Each of the damper devices of Examples 3 to 5 includes a reinforcing portion 43 that reinforces the regulating portion 15. Therefore, all of the damper devices of Examples 3 to 5 have a configuration capable of suppressing damage to the regulating unit 15 particularly effectively.

Hereinafter, the reinforcing portion 43 of the damper device of the third to fifth embodiments will be described in order. The shape of the regulation unit 15 of Examples 3 and 5 has the same configuration as the shape of the regulation unit 15 of Example 1.
First, in the damper device of the third embodiment, as shown in FIGS. 22 and 23 (a), the regulation unit 15 (specifically, the first component 15a'in the first regulation unit 15a) starts from the gear 12. A reinforcing portion 43 (reinforcing portion 43a) is provided on the side opposite to the side that receives the contact force (downstream side in the direction F1). Here, as shown in FIG. 23A, the reinforcing portion 43a of the present embodiment is formed on the surface 14b of the accommodating portion 14 opposite to the surface 14a on the side where the regulating portion 15 is provided. .. The reinforcing portion 43a of the present embodiment has a configuration in which the regulating portion 15 can be reinforced by supporting the regulating portion 15 on the downstream side of the direction F1 that receives the force from the gear 12.

Next, as shown in FIG. 23B, the damper device of the fourth embodiment is a portion serving as a lid when the position facing the regulating portion 15 (the surface 14a is considered as the bottom surface of the accommodating portion 14). A reinforcing portion 43 (reinforcing portion 43b) is provided on the surface 14b). The regulating portion 15 of this embodiment is provided with a convex portion 44, and the reinforcing portion 43b of this embodiment is provided with a concave portion 45 into which the convex portion 44 can be fitted. Then, as shown in FIG. 23B, the reinforcing portion 43b of the present embodiment is formed on the surface 14b of the accommodating portion 14 opposite to the surface 14a on the side where the regulating portion 15 is provided. The reinforcing portion 43b of the present embodiment has a configuration in which the regulating portion 15 can be reinforced by receiving a force received from the gear 12 by the regulating portion 15 via a concave portion 45 fitted to the convex portion 44.
In this embodiment, the regulating portion 15 is provided with a convex portion and the reinforcing portion 43b is provided with a concave portion, but the restricting portion 15 is provided with a concave portion and the reinforcing portion 43b is provided with a convex portion. It may be.

Next, in the damper device of the fifth embodiment, as shown in FIG. 23 (c), the regulating unit 15 is on the opposite side to the side where the force is received from the gear 12, and the regulating unit 15 in the accommodating unit 14 is A reinforcing portion 43 (reinforcing portion 43c) is provided on the surface 14a on the side to be provided. The reinforcing portion 43c of the present embodiment has a configuration in which the regulating portion 15 can be reinforced by supporting the regulating portion 15 on the downstream side of the direction F1 that receives the force from the gear 12.

The present invention is not limited to the above-described embodiment, and can be realized with various configurations within a range not deviating from the gist thereof. For example, the technical features in the examples corresponding to the technical features in each form described in the column of the outline of the invention may be used to solve some or all of the above-mentioned problems, or one of the above-mentioned effects. It is possible to replace or combine as appropriate to achieve part or all. For example, the damper device of the first to fifth embodiments is configured to include two opening / closing members (opening / closing plate 5 and opening / closing plate 6), but may be configured to include only one opening / closing member. In the case of a configuration including only one opening / closing member, the gear 12 as the transmission gear and the gear 13 as the output gear are unnecessary, so that the driving force of the drive source can be transmitted to the gear 11 as the output gear, and the regulation unit. The transmission gear whose rotation range is regulated by 15 can be the gear 10.
Further, if the technical feature is not described as essential in the present specification, it can be deleted as appropriate.

1 ... Damper device, 2 ... Driving force transmission device, 3 ... 1st frame, 4 ... 2nd frame,
5 ... Opening and closing plate (opening and closing member), 6 ... Opening and closing plate (opening and closing member), 7 ... Opening, 8 ... Opening
9 ... Gear train, 10 ... Gear (rotary gear), 11 ... Gear (output gear),
12 ... Gears (transmission gears, driven gears), 13 ... Gears (output gears), 14 ... Accommodating parts,
14a ... The surface on the side where the regulation unit 15 is provided, 14b ... The surface on the side opposite to the surface 14a,
15 ... Regulatory Department, 15a ... 1st Regulatory Department, 15a'... 1st Component,
15a'' ... 2nd component, 15b ... 2nd regulation part, 15b'... 1st component,
15b'' ... 2nd component, 15c ... 1st regulation, 15d ... 2nd regulation,
15e ... Regulatory part, 16 ... Rotating shaft, 17 ... Gear, 18 ... First gear, 19 ... Large diameter gear part,
20 ... Small diameter gear part, 21 ... Second gear, 22 ... Large diameter gear part, 23 ... Small diameter gear part,
24 ... 3rd gear, 25 ... Large diameter gear part, 26 ... Small diameter gear part, 27 ... Teeth, 28 ... Teeth,
29 ... teeth, 30 ... rotating shaft, 31 ... teeth, 32 ... teeth, 33 ... rotating shaft, 34 ... contact part,
35 ... contacted portion, 36 ... pressing portion, 37 ... rotating shaft, 38 ... outer peripheral portion of gear 12.
39 ... side surface of regulation part 15, 40 ... end of regulation part 15, 41 ... contact position, 42 ... wall part,
42a ... wall part, 42b ... wall part, 42c ... wall part, 43 ... reinforcing part, 43a ... reinforcing part,
43b ... Reinforcing part, 43c ... Reinforcing part, 44 ... Convex part, 45 ... Concave part, 46 ... Engaging part,
47 ... Corner, 48 ... Stepping motor (drive),
49 ... Outer peripheral surface (contact surface) of the gear 12, 50 ... Ribs, 51 ... Large diameter arc portion,
52 ... Small diameter arc part, 53 ... Flat plate part, 54 ... Corner part, 55 ... Relief part, 56 ... Mounting surface,
57 ... The surface of the flat plate portion 53 on the mounting surface 56 side, 58 ... Relief portion, 59 ... Circumferential portion, 60 ... Contact portion,
61 ... Flat part, 101 ... Refrigerator, 102 ... Refrigerator room, 103 ... Freezer room, 104 ... Vegetable room,
105 ... cooler, 106 ... blower, 107 ... damper device, 108 ... damper device,
210 ... gears, 211 ... gears, 212 ... gears, 213 ... gears, 260 ... passages,
AF ... airflow, E ... direction different from the direction of receiving force, F1 ... direction of receiving force,
F2 ... Direction to receive the received force, L1 ... Distance, L2 ... Distance

Claims (11)

With the drive source
An opening / closing member that opens and closes by the driving force of the drive source,
An output gear that outputs the driving force of the driving source to the opening / closing member, and
A transmission gear that transmits the driving force of the drive source to the output gear,
A regulatory unit that regulates the rotation range of the transmission gear by contact with the transmission gear,
The restricting portion is provided, and the accommodating portion for accommodating the output gear and the transmission gear is provided.
The transmission gear is configured to rotate in the rotation range from the first position to the second position by restricting the rotation range by the regulation unit.
The regulating portion is configured to regulate the rotation of the transmission gear by contacting the outer peripheral portion of the transmission gear .
The regulating unit has a second component that extends in a direction of receiving a force from the transmission gear when it comes into contact with the transmission gear.
The second component is a damper device characterized in that the side opposite to the side receiving the force from the transmission gear is connected to the outer peripheral wall of the accommodating portion. A damper device characterized by being present. In the damper device according to claim 1,
The transmission gear is a damper device having a contact surface with respect to the regulation portion. In the damper device according to claim 1 or 2.
The damper device is characterized by having a first component that extends in a direction different from the direction in which a force is received from the transmission gear by coming into contact with the transmission gear. In the damper device according to any one of claims 1 to 3,
The damper device is characterized in that the regulating portion is connected to a plurality of locations on the outer peripheral wall. In the damper device according to any one of claims 1 to 4.
The regulating portion is a damper device characterized by having a rib shape. In the damper device according to any one of claims 1 to 5,
A damper device characterized in that the contact position of the restricting portion with the transmission gear is a position deviating from the end portion of the restricting portion. In the damper device according to any one of claims 1 to 6.
The damper device is characterized in that the regulating portion is integrally molded with the accommodating portion. In the damper device according to any one of claims 1 to 7.
A rotary gear having a contact portion, having a common rotation shaft with the transmission gear, and transmitting the driving force of the drive source to the transmission gear via the contact portion is provided.
The transmission gear has a contacted portion, and the driven gear rotates in conjunction with the rotary gear when the contacted portion and the contacted portion come into contact with each other and the contacted portion receives a force by the contacted portion. And
When the contact portion rotates and moves in an interlocking range that is a part of the rotation range of the rotary gear, the contact portion and the contacted portion come into contact with each other, and the contact portion covers a non-interlocking range that is out of the interlocking range. The contact between the contact portion and the contacted portion is released during the rotational movement.
A damper device including a pressing portion that prevents accompanying rotation by applying a load to rotation of the transmission gear in the non-interlocking range. In the damper device according to any one of claims 1 to 8.
The transmission gear has a meshing portion in which teeth are provided in a part of concentric circles with reference to the rotation axis of the transmission gear, and the drive source is formed by engaging the meshing portion with the teeth of the output gear. A damper device characterized in that it is configured to transmit the driving force of the above to the output gear. In the damper device according to any one of claims 1 to 9.
A damper device including a reinforcing portion that reinforces the regulating portion. In the damper device according to any one of claims 1 to 10.
The regulation unit is a damper device characterized in that at least one of the intersections of two surfaces is chamfered.

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