JPH0671932U - Force transmission mechanism and damper device using the same - Google Patents

Abstract

(57) [Abstract] [Purpose] To enable stable and reliable speed switching when the toilet lid of a Western-style toilet is moved quickly to a predetermined rotation position during its closing operation and then slowly. [Structure] An input gear 3 including a small-diameter gear portion 3a and a large-diameter gear portion 3b, into which the turning force of a toilet lid of a Western-style toilet is input, and a large-diameter gear portion 5 capable of meshing with the small-diameter gear portion 3a.
a and a small-diameter gear portion 5b capable of meshing with the large-diameter gear portion 3b
The output gear 5 is made to mesh with both gear portions 3a, 5a and both gear portions 3b, 5b sequentially and continuously, while the governor 7 suppresses the rotational speed of the output gear 5. .

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a force transmission mechanism in which two shafts perform unequal rotational movement when transmitting one rotation force to the other between the two shafts, and a damper device using the same.

[0002]

[Prior art]

 Conventionally, for example, as a damper device, when the toilet lid of a Western-style toilet closes from the open position to the closed position, the speed up to that point is increased and then slowly closed to the closed position. There is one known in Kaihei 3-265727. This is a viscous material layer between the rotary shaft and a casing that rotatably supports the rotary shaft, while an operating shaft that rotates together with the toilet lid is drivingly connected to the rotary shaft through an elastic member. The elastic member elastically deforms the toilet lid to close relatively quickly and smoothly until the middle of the closing operation of the toilet lid, and when the deformation elasticity reaches the limit, the rotating shaft becomes the operating shaft. By switching to a state in which the body rotates, viscous resistance of the viscous material layer with respect to the rotating shaft is generated, and the closing speed of the toilet lid is greatly reduced.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional damper device, the timing for switching the rotation state of the rotary shaft is set based on the elastic characteristic of the elastic member. Therefore, for example, when the elastic characteristic changes due to the influence of temperature, etc. The switching timing is likely to change. As a result, for example, when the elastic member is hardened and the switching timing becomes early, the closing operation of the toilet lid becomes slow as a whole, and conversely when it softens and becomes slow, deceleration becomes insufficient. Then, there is a problem that the closing operation of the toilet lid tends to be uncertain.

Therefore, in place of the elastic member, a force transmission mechanism in which two shafts perform unequal rotational movements by an oval gear or the like is used, and the closing speed of the toilet lid depends on the rotational position of the gear, that is, the toilet lid. It is conceivable that the speed is mechanically changed according to the rotational position. However, in this case, a non-circular special gear such as the oval gear having a different diameter depending on the portion is required, which causes a problem of high cost.

The present invention has been made in view of the above points, and its main purpose is to make it possible to switch the rotational speed on the side to which the rotational force is transmitted with a relatively low-cost structure. Therefore, for example, a speed change can be stably and reliably performed when the toilet lid of a Western-style toilet is moved to a predetermined rotational position in the middle of its closing operation and then moved slowly thereafter.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, in the force transmission mechanism according to the invention of claim 1, each of the plurality of gear portions in the first gear group is capable of meshing with each corresponding to each of the plurality of gear portions in the second gear group. In addition, the gear diameter ratios of the gear parts that can mesh with each other are made different.

Specifically, in the present invention, a plurality of gear parts each having a tooth part arranged on the circumference are concentrically and axially displaced from each other One gear group and gear portions each having the same number of gear portions as the gear portions of the first gear group, each of which is arranged on the circumference, are concentrically and axially displaced from each other, and are integrally connected in rotation. A force transmission mechanism that includes a second gear group and is configured to transmit the rotational force of one of the first and second gear groups to the other gear group.

Further, at least one gear portion of the gear portions having mutually the same axial center positions in the first and second gear groups has tooth portions arranged in an arc shape, and the first and second gear portions are arranged. It is assumed that the tooth portions of each gear portion of the two gear groups are continuous at least in the circumferential direction. Then, the respective gear parts of the first gear group can be meshed with each other corresponding to the gear parts of the second gear group, and the gear diameter ratios of the mutually meshable gear parts are different from each other. Further, the gear parts are configured to mesh in order and continuously.

According to a second aspect of the present invention, there is provided the force transmission mechanism according to the first aspect, wherein at least one gear group of the first and second gear groups makes one rotation of the gear portions that can mesh with each other. The gears are configured to mesh with each other in the order of the gear diameter ratio.

In the damper device of the invention of claim 3, in the invention of claim 1 or 2, the turning force is input to the first gear group, while the second gear group of the second gear group is input. The governor is drivingly connected to suppress the rotation speed.

According to a fourth aspect of the present invention, in the damper device of the third aspect, the first gear group has a small diameter gear portion and a large diameter gear portion, while the second gear group has a small diameter portion of the first gear group. It is assumed to have a large-diameter gear portion that can mesh with the toothed gear portion and a small-diameter gear portion that can mesh with the large-diameter gear portion of the first gear group.

In the damper device of the invention of claim 5, in the device of claim 3 or 4, the rotational force rotates the first gear group in one direction in the middle of the route until the rotational force is transmitted to the governor. A one-way clutch is provided to transmit the rotational force to the governor when it is to be rotated, and to stop the transmission of the rotational force when it is to be rotated in the other direction. Then, the gear portions of the first and second gear groups are arranged such that, when the one-way clutch is in the rotational force transmitting state, at least one gear group of the first and second gear groups is rotated by one rotation. , The first gear group side is configured to mesh in order of increasing gear diameter ratio.

[0013]

[Action]

 With the above construction, according to the first aspect of the invention, one gear group of the first and second gear groups is in a state in which each gear section of the first gear group meshes with the gear section of the second gear group. By rotating integrally, the rotational force is transmitted to the other gear group of the first and second gear groups, and the gear group is also rotated integrally. In the first and second gear groups, since the tooth portions of each gear portion are at least continuous in the circumferential direction, the rotational force of one gear group of the first and second gear groups is the other. It is continuously transmitted to the gear group without interruption. At this time, the gear parts that can mesh with each other have different gear diameter ratios, and since they mesh in order, the gear ratio between both gear groups is the same as the rotation position of the one gear group. Based on the change of the gear diameter ratio, the rotation speed of the other gear group is changed stepwise based on the change of the gear diameter ratio. Further, since the respective gear parts of the first and second gear groups are circular or fan-shaped, each having tooth portions arranged on the circumference, the gear parts are lower than special gears such as oval gears. A costly spur gear or the like can be used.

According to the second aspect of the invention, at least one gear group of the first and second gear groups rotates once by meshing the gear portions that can mesh with each other in the order of the gear diameter ratio. Until then, the rotational speed of the gear group on the side to which the rotational force is transmitted is switched stepwise in either the increasing direction or the decelerating direction.

According to the third aspect of the present invention, since the rotational speed of the second gear group is suppressed by the governor, the rotational power input to the first gear group depends on the gear diameter ratio between the two gear groups. Be suppressed. That is, when the gear diameter ratio on the side of the first gear group is small, the rotation speed of the second gear group is decelerated, so that the rotation speed of the first gear group is less suppressed by the governor. The speed is not greatly suppressed. On the other hand, when the gear diameter ratio is large, the rotation speed of the second gear group is increased, so that it is greatly suppressed, and thus the rotation speed of the first gear group is also greatly suppressed.

According to the invention of claim 4, when the turning force is input to the first gear group, the meshing state between the first gear group and the second gear group is such that the small-diameter gear portion of the first gear group is A state in which the large diameter gear portion of the second gear group meshes with a state in which the gear diameter ratio on the first gear group side is larger than that in the state, that is, the large diameter gear portion of the first gear group has a smaller diameter of the second gear group. The rotation of the second gear group is increased by meshing with the gear portion. As a result, the rotation speed of the second gear group is switched in two stages based on the rotation position of the first gear group. Therefore, with a relatively simple two-stage and two-shaft configuration in which a two-axis gear group composed of two-stage gears is combined, for example, the closing speed of the toilet lid in a Western-style toilet can be adjusted gradually based on the rotating position of the toilet lid. It can be switched to two stages.

According to the fifth aspect of the invention, when the rotational force is for rotating the first gear group in one direction on the way until the rotational force is transmitted to the governor, the rotational force is generated by the one-way clutch. It is transmitted to the governor. Further, in the rotational force transmission state of the one-way clutch, the first and second gear groups mesh with each other in order of increasing gear diameter ratio on the first gear group side. As a result, the rotational speed of the second gear group is gradually switched to the increasing direction, and the suppression of the rotational speed from the governor becomes large. Therefore, the rotational speed of the first gear group is gradually suppressed. become. On the other hand, when the rotational force is for rotating the first gear group in the other direction, the one-way clutch stops transmission of the rotational force to the governor, so that the rotational speed of the first gear group is changed to the governor. Will no longer be suppressed by.

[0018]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 to 3 show a damper device according to this embodiment. The damper device is installed in a Western-style toilet, and switches each closing speed of the toilet lid a and the toilet seat a'of the Western-style toilet in two steps. It penetrates one side of the casing 1 having a rectangular box shape, The operating shafts 2, 2'which are drive-connected to the toilet lid a and the toilet seat a ', respectively, and the output support shaft 4 which is installed in the casing 1 in a state parallel to the operating shafts 2, 2'. Two output gears 5, 5'as a second gear group rotatably supported by the gear train, a gear train 6 drivingly connected to these two output gears 5, 5 ', and a gear train 6 A governor 7 that is drive-coupled and that controls the rotational speeds of the output gears 5 and 5 ', respectively, and is disposed between the output gears 5 and 5'and the gear train 6, respectively, and the input gear 3 is provided. , 3 ′ rotates in the closing direction of the toilet lid a and the toilet seat a ′ (counterclockwise direction in FIG. 1). And the clutch springs 8 and 8'as one-way clutches that transmit the rotational force to the governor 7 via the gear train 6 and stop the transmission of the rotational force when rotating in the opening direction (clockwise direction in the figure). Is equipped with. The toilet lid side operating shaft 2 is solid and is concentrically fitted and inserted into the hollow toilet seat side operating shaft 2 ', and in this state both operating shafts 2 and 2' penetrate the casing 1. The toilet lid a is connected to one input gear 3 and the output gear 5 via the operating shaft 2, and the toilet seat a'is connected to the other input gear 3'and the output gear 5'via the operating shaft 2 ', respectively. The drive is connected.

The gear train 6 is rotatably supported by the output support shaft 4 and a first gear 9 disposed between the two output gears 5 and 5 ′, and is always meshed with the first gear 9. A second gear 11 rotatably integrated with the first support shaft 10 and a third gear 12 rotatably supported by the first support shaft 10 and having a diameter larger than that of the second gear 11. The third gear 12 has a small-diameter gear portion 13a that always meshes, and the fourth gear 13 rotatably integrated with the second support shaft 14 and the large-diameter gear portion 13b of the fourth gear 13 constantly mesh. , And a fifth gear 16 provided integrally with the third support shaft 15 so as to rotate together. Further, the third gear 12 is clamped and held between the third gear 12 and the second gear 11 by the holding metal fitting 17, whereby the third gear 12 is rotatably connected to the second gear 11, while the second gear 11 is When a load is applied to the gear 11 side, slippage occurs between the two gears 11 and 12 so that no further load is applied to each part from the third gear 12 to the governor 7.

The governor 7 is a kind of braking device that uses an eddy current, and is composed of a conductor disk 18 that is rotatably integrated with the third support shaft 15 of the gear train 6 and the conductor disk 18 from both sides. An N pole and an S pole are arranged so as to be sandwiched at a predetermined interval, and a permanent magnet 19 is arranged. When the conductor disc 18 rotates, an eddy current generated in the conductor disc 18 by the permanent magnet 19 causes a conductor circle. A braking force acts on the rotational movement of the plate 18.

Each of the clutch springs 8 and 8 ′ has a coil shape. The clutch spring 8 on the side of the toilet lid a is left-handed and the clutch spring 8 ′ on the side of the toilet seat a ′ is right-handed. It is set. The clutch springs 8 and 8'are externally fitted to the boss portions of the output gears 5 and 5'and the first gear 9, respectively, and the ends on the output gear 5 and 5'sides are respectively fitted to the output gears 5 and 5 '. The inner peripheral portion on the boss side of the first gear 9 is wound so as to be slidably contactable with the outer peripheral surface of the boss portion while being connected integrally with 5 '. When the clutch is closed, the clutch springs 8 and 8'are tightened in the rotational direction of the output gears 5 and 5 '(clockwise direction in FIG. 1) to transmit the rotational force to the first gear 9, while the opening operation is performed. At times, the tightening force of the clutch springs 8 and 8'on the first gear 9 is relaxed to stop the transmission of the turning power.

Next, the input gears 3 and 3'and the output gears 5 and 5'which are the features of the present invention will be described. The gears 3 and 5 on the side of the toilet lid a and the gears 3'and 5'on the side of the toilet seat a'are the same as each other except that their shapes and operating directions are plane symmetry. The input gear 3 and the output gear 5 on the a side will be described, and the description on the two gears 3'and 5'on the toilet seat a'side will be omitted.

In the input gear 3, the small diameter gear portion 3 a and the large diameter gear portion 3 b each having tooth portions arranged in an arc shape are concentrically displaced from each other in the axial direction of the operating shaft 2. It is connected as a rotating unit. On the other hand, in the output gear 5, the large-diameter gear portion 5a and the small-diameter gear portion 5b, each of which has tooth portions arranged on the entire circumference, are concentric with each other and in the axial direction of the output support shaft 4. It is displaced and is connected integrally with the rotation. The input gear 3 transmits its rotational force to the output gear 5 according to the turning force of the toilet lid a input to the input gear 3 via the operating shaft 2.

Specifically, both the small-diameter gear portion 3a and the large-diameter gear portion 3b of the input gear 3 are fan-shaped, and the large-diameter gear portion 3b has tooth portions over its entire arc and a small-diameter gear portion 3b. The gear portion 3a has tooth portions only in the range on the circumference that does not overlap the large diameter gear portion 3b on the circular arc in the axial direction, and these small diameter gear portion 3a and large diameter gear portion 3b have teeth. The teeth are arranged to be continuous in the circumferential direction. The small-diameter gear portion 3a of the input gear 3 is meshable with the large-diameter gear 5a of the output gear 5, and the large-diameter gear 3b of the input gear 3 is meshable with the small-diameter gear portion 5b of the output gear 5, respectively. The gear portions 3a and 5a are meshed with each other, and the gear portions 3b and 5b are meshed with each other sequentially and continuously at different gear diameter ratios.

The gear portions 3a and 5a and the gear portions 3b and 5b are arranged in the order in which the gear diameter ratio on the input gear 3 side increases when the clutch spring 8 is in the rotational force transmitting state, that is, First, the small diameter gear portion 3a of the input gear 3 meshes with the large diameter gear portion 5a of the output gear 5, and then the large diameter gear portion 3b meshes with the small diameter gear portion 5b.

Therefore, in this embodiment, when the rotating force of the toilet lid a is input to the input gear 3 when the toilet lid a of the Western-style toilet is opened and closed, the respective gear parts 3 a and 3 b of the input gear 3 output. The input gear 3 integrally rotates in a state of meshing with the gear portions 5a and 5b of the gear 5, and the rotational force is transmitted to the output gear 5 so that the output gear 5 also integrally rotates. Since the tooth portions of the gear portions 3a and 3b in the input gear 3 are circumferentially continuous, the rotational force of the input gear 3 is continuously transmitted to the output gear 5 without interruption.

At this time, since the gear diameter ratios of the gear portions 3a, 5a and the gear portions 3b, 5b which can be meshed with each other are different from each other, both gears 3, 3 The gear diameter ratio between the gears 5 changes stepwise, and the rotation speed of the output gear 5 is changed stepwise according to the change of the gear diameter ratio.

When the toilet lid a closes from the open position toward the closed position, as shown in FIG. 4, first, the small-diameter gear portion 3 a of the input gear 3 is moved to the large-diameter gear of the output gear 5. It meshes with the part 5a. Next, at the stage when the toilet lid a reaches a predetermined rotational position on the way between the open position and the closed position, that is, when the input gear 3 reaches the predetermined rotational position, as shown in FIG. 5a no longer meshes with each other, and at the same time, the large diameter gear portion 3b of the input gear 3 meshes with the small diameter gear portion 5b of the output gear 5. Then, in the state where the gear portions 3b and 5b are meshed with each other, the toilet lid a closes from the predetermined position toward the closed position. In this manner, when the toilet lid a is closed, the gears 3 and 5 mesh with each other in the order in which the gear diameter ratio on the input gear 3 side increases, so that the output gear 5 is rotated based on the rotational position of the input gear 3. The rotational speed of the output gear 5 is switched stepwise in the direction of increasing speed, and the rotational force of the output gear 5 is transmitted to the governor 7 via the gear train 6 by the clutch spring 8 between the output gear 5 and the gear train 6. It

At this time, the rotational speed of the output gear 5 is suppressed by the governor 7, so that the turning force input to the input gear 3 is suppressed according to the gear diameter ratio between the both gears 3, 5. It That is, as shown in FIG. 4, when the gear diameter ratio on the input gear 3 side is small, the rotation speed of the output gear 5 is reduced, so that the rotation speed is less restrained by the governor 7, and therefore the input gear 3 is suppressed. The rotation speed of 3 is not greatly suppressed. On the other hand, as shown in FIG. 6, when the gear diameter ratio on the side of the input gear 3 is large, the rotational speed of the output gear 5 is increased, which is greatly suppressed. Therefore, the rotational speed of the input gear 3 is also greatly suppressed. It That is, during the closing operation of the toilet lid a, the rotation speed of the output gear 5 is switched stepwise in the direction of increasing speed, so that the rotation speed of the input gear 3 is suppressed stepwise. As a result, the toilet lid a closes relatively quickly and smoothly from the open position to the predetermined rotation position on the way from the closed position to the closed position, and when the predetermined rotation position is reached, that is, the input gear 3 reaches the predetermined rotation position. The gear ratio between the gears 3 and 5 is switched at the reached stage, and the closing speed is greatly reduced and the gear is slowly closed from the predetermined turning position to the closing position. When the toilet lid a is closed, the first gear 9 of the gear train 6 rotates according to the rotation of the output gear 5 on the toilet lid a side. The first gear 9 is the clutch spring 8'on the toilet seat a'side. Since the winding tightening force of 7 rotates in the loosening direction, there is no fear that the closing operation of the toilet lid a will be interfered with by the output gear 5'on the toilet seat a'side.

On the other hand, during the opening operation of the toilet lid a, the rotational operation force of the toilet lid a causes the input gear 3 to rotate in the clockwise direction of FIGS. 4 to 6, and the rotational force is the output gear 5 and the gear. The transmission to the governor 7 is stopped by the clutch spring 8 between the first gear 9 of the train 6 and the rotational speed of the input gear 3 is not suppressed by the governor 7. As a result, the opening operation of the toilet lid a can be performed without requiring a large operation force. In this case, since the first gear 9 has stopped rotating, the output gear 5'on the toilet seat a'side does not rotate together with the output gear 5 on the toilet lid a side, and therefore the toilet lid a ' There is no risk that the toilet seat a ′ will be opened by mistake during the opening operation.

The above damper device has a relatively simple two-shaft two-stage structure in which the two-stage gear portions 3a and 5a of the input gear 3 and the two-stage gear portions 3b and 5b of the output gear 5 are combined. Since the rotation speed of the output gear 5 can be reliably switched based on the rotation position of the input gear 3 while keeping the same, the overall damper device can be made compact and low cost, and the closing speed of the toilet lid a can be reduced. It is possible to stably switch between two stages of slow and rapid based on the predetermined rotational position of the toilet lid a.

In the above embodiment, the input gear 3 has two stages, the small diameter gear portion 3a and the large diameter gear portion 3b, and the output gear 5 has two stages, the large diameter gear portion 5a and the small diameter gear portion 5b. Although the structure is simplified in this way, each of them may have three or more stages, for example, the closing speed of the toilet lid may be reduced at a plurality of rotational positions during the closing operation.

Further, in the above embodiment, all the gear parts 3a and 3b of the input gear 3 are fan-shaped, and all the gear parts 5a and 5b of the output gear 5 are circular, but It suffices that at least one of the meshable gear portions has tooth portions arranged in an arc shape, and for example, all gear portions may be fan-shaped.

Further, in the above embodiment, the operating shaft 2 of the input gear 3 and the output shaft 4 of the output gear 5 are arranged in parallel with each other, but in the present invention, each gear portion has a constant diameter. Since each of the gear parts that can be meshed with each other has a constant distance from each shaft center to each meshing position, each of the gear parts that can mesh with each other is It is not necessary to arrange them on the same plane, and therefore, for example, a bevel gear or the like may be used to intersect the two axes in order to increase the degree of freedom in design.

In the above embodiment, the governor 7 is an electrical one using an eddy current, but various things such as a mechanical one using centrifugal force can be used.

In the above embodiment, the clutch springs 8 and 8 ′ are used as a one-way clutch, and the clutch springs 8 and 8 ′ are arranged between the output gear 5 and the gear train 6. A clutch spring other than the clutch springs 8 and 8'may be used for the one-way clutch, and the disposing position may be in the middle of the route through which the turning force is transmitted to the governor 7.

Further, in the above embodiment, the tooth portions of the gear portions 3a, 3b of the input gear 3 are continuous in a predetermined range in the circumferential direction, and the input gear 3 and the output gear 5 are in this range. Although it is designed to reciprocally rotate, the teeth may be continuous over the entire circumference in the circumferential direction, and in that case, both gears may rotate multiple times. Yes.

Further, in the above embodiment, the damper device is applied to the toilet lid of the Western-style toilet, but it can be applied to various opening / closing lids of OA equipment and AV equipment.

[0039]

[Effect of device]

 As described above, according to the force transmission mechanism of the first aspect of the present invention, when the rotational force of one gear group of the first and second gear groups is transmitted to the other gear group, one gear group Since the rotational speed of the other gear group can be mechanically switched based on the rotational position of the gear, the switching timing is more stable than that of the conventional one that uses an elastic member to switch the rotational speed. The gear part of the group can be composed of spur gears, etc., and the cost is lower than that using special gears such as oval gears.

According to the force transmission mechanism of the second aspect of the present invention, since the gear parts that can be meshed with each other mesh with each other in the order of the gear diameter ratio, the number of the first and second gear groups is small. During the rotation of at least one gear group, the rotational speed of the gear group on the rotational force transmission side is increased based on the rotational position of the gear group on the rotational force transmission side. It is possible to switch stepwise in either the direction or the decelerated direction.

According to the damper device of the third aspect of the present invention, the rotational force of the second gear group is suppressed by the governor while the rotational force is input to the first gear group. It can be easily and reliably suppressed based on the rotational position of the first gear group. As a result, when the damper device is used for closing the toilet lid of a Western-style toilet, for example, when the toilet lid closing speed is gradually reduced at a predetermined position during the closing operation, the toilet lid is rotated. The closing speed can be reliably switched based on the position.

According to the damper device of the fourth aspect of the present invention, a relatively simple two-shaft, two-stage structure in which the two-stage gear unit in the first gear group and the two-stage gear unit in the second gear group are combined. Despite the construction, the rotation speed of the first gear group can be reliably switched between two stages, ie, the speed based on the rotation position of the first gear group, and the damper device as a whole can be made compact, and the above gear parts Can be constructed using spur gears, and is lower in cost than using special gears such as oval gears.

According to the damper device of the fifth aspect of the present invention, the one-way clutch is provided in the middle of the path through which the rotational force is transmitted to the governor, so that the rotational force input to the first gear group is changed. Since the damper effect can be exerted according to the moving direction, for example, when it is applied to the opening / closing mechanism of the toilet lid of a Western-style toilet bowl, the damper effect is exerted at the time of closing operation to provide a high-speed feeling with a small closing sound. While a certain closing operation can be performed reliably, the damper effect can be automatically canceled during the opening operation to avoid the bumper device from interfering with the opening operation, ensuring an easy opening operation. You can

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a damper device according to an embodiment of the present invention.

FIG. 2 is a plan view showing the inside of the damper device.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a plan view showing a meshing state of an input gear and an output gear at an initial stage of a closing operation.

FIG. 5 is a plan view showing a meshing state of an input gear and an output gear during a closing operation.

FIG. 6 is a plan view showing the meshing state of the input gear and the output gear in the latter half of the closing operation.

[Explanation of symbols]

 3, 3'Input gear (first gear group) 3a, 3a 'Small diameter gear portion (gear portion) 3b, 3b' Large diameter gear portion (gear portion) 5, 5'Output gear (second gear group) 5a, 5a ′ Large diameter gear section (gear section) 5b, 5b ′ Small diameter gear section (gear section) 7 Governor 8, 8 ′ Clutch spring (one-way clutch)

Claims (5)

[Scope of utility model registration request] 1. A first gear group in which a plurality of gear portions each having a tooth portion arranged on a circumference are concentrically and axially displaced from each other and are rotationally connected to each other, A second gear group in which gear sections each having the same number of gear sections as one gear group and each having tooth sections arranged on the circumference are concentrically and axially displaced and integrally coupled with each other. And a force transmission mechanism configured to transmit the rotational force of one gear group of the first and second gear groups to the other gear group of the first and second gear groups, which are opposed to each other in the first and second gear groups. At least one gear portion of the gear portions having the same axial center position has tooth portions arranged in an arc shape, and the tooth portions of each gear portion of the first and second gear groups each have a circumference. At least continuous in each direction, and each gear portion of the first gear group The respective gear diameter ratios of the gear portions that can be meshed with each other corresponding to the gear portions of the second gear group and that can be meshed with each other are different from each other, so that the gear portions mesh with each other sequentially and continuously. A force transmission mechanism characterized by being made. 2. The force transmission mechanism according to claim 1, wherein the gear portions that can be meshed with each other have a gear diameter ratio of at least one gear group of the first and second gear groups until one gear group makes one rotation. A force transmitting mechanism characterized in that the force transmitting mechanism is adapted to be meshed in order of size. 3. A damper device using the force transmission mechanism according to claim 1 or 2, wherein rotational force is input to the first gear group,
A damper device in which a governor for suppressing the rotational speed of the second gear group is drivingly connected to the second gear group. 4. The damper device according to claim 3, wherein the first gear group has a small diameter gear portion and a large diameter gear portion,
The damper device, wherein the second gear group has a large-diameter gear portion that can mesh with the small-diameter gear portion of the first gear group and a small-diameter gear portion that can mesh with the large-diameter gear portion of the first gear group. 5. The damper device according to claim 3 or 4, wherein when the rotational force is for rotating the first gear group in one direction, the rotational force is transmitted in the middle of the path until the rotational force is transmitted to the governor. A one-way clutch that transmits the force to the governor and stops the transmission of the rotational force when rotating in the other direction is provided, and the one-way clutch has a rotational force between the gear portions of the first and second gear groups. When in the transmission state, the gears are configured to mesh with each other in the order of increasing gear diameter ratio on the first gear group side until at least one gear group of the first and second gear groups makes one rotation. Damper device characterized by.