JP2007068320A - Geared motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a geared motor that automatically drives the rotational center of an opening/closing member such as a door, and does not cause a cost increase and complication in handling by making the opening/closing member whose drive center is symmetrically operated so as to drive the door that is opened to the right and left also serve as a member for a common unit. <P>SOLUTION: The tip side of a cylindrical trunk 40a of an output gear 40 is rotatably supported to a bearing 38a formed on the plane surface 37c of a lower case 37 via a slide bearing 41, the other side face of the output gear 40 has a groove 40b that is continuously formed along the direction of a circumference for arranging therein a bearing 38b formed on the plane surface 35c of an upper case 35, and inner walls of the groove b are rotatably supported to inner walls of the bearing 38b. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a geared motor capable of opening and closing a door in a refrigerator or the like.

The door to the opening of a refrigerator or the like is attracted to the front surface of the opening frame by an attracting magnet in order to maintain a closed state. Therefore, a great deal of force is required in the initial operation of opening the door. Therefore, an operation assisting device that assists an initial operation requiring a great force has been proposed. This operation assisting device assists only the first operation of opening the door, and the door is configured to be manually opened and closed in principle. (For example, see Patent Document 1)
JP 2003-240424 A

However, in the case of the operation assisting device of Patent Document 1, since the door is manually opened and closed, in recent refrigerators in which the door itself has a large storage space, the door becomes very heavy when food is stored. However, children with weak power and the elderly have a problem that even if the first operation to open the door is good, the subsequent opening / closing operation becomes difficult.

  Therefore, the inventor of the present application has proposed to use a geared motor that automatically drives the center of rotation of an opening / closing member such as a door. Since the drive center operates symmetrically, a dedicated geared motor is required for each of the left and right doors, and there is a problem that the cost increases and the handling thereof becomes complicated. Here, the inventor of the present application proposes a geared motor that does not incur an increase in cost and complexity of handling by sharing a common unit even when the door is double-opened. Is.

  That is, an object of the present invention is a geared motor that automatically drives the rotation center of an opening / closing member such as a door, and the driving center of the opening / closing member operates symmetrically so as to drive a door that is double-opened. It is an object of the present invention to provide a geared motor that does not cause an increase in cost and complexity of handling by using an opening / closing member that is shared by a substantially common unit.

  In order to solve the above problems, the present invention comprises a geared motor having a motor and an output gear that outputs rotation from the motor, and includes a plurality of divided case bodies in which the motor and the output gear are provided. Each of the plurality of divided case bodies has a pair of parallel planes facing each other, and the pair of parallel planes includes a pair of parallel planes. An opening having support portions for supporting both ends and an output portion extending in an axial direction from the output gear and outputting the output of the output gear to the outside of the case is inserted on one side of the pair of parallel planes. The other side of the pair of parallel planes is characterized in that at least the axial direction of the output gear is closed by a closing portion so that the output gear is not exposed to the outside.

  In the present invention, the output gear extends in the axial direction at the center of rotation, and the output portion formed separately from the output gear is engaged by being inserted through the opening. It is preferable to have a cylindrical body having holes. At this time, the cylindrical body portion is formed in a bottomed cylindrical shape having a bottomed portion that opens on one side in the axial direction and closes the other side in the axial direction so that the engagement hole engages with the output portion. The bottomed portion is preferably in contact with the closing portion. If comprised in this way, even if it is a cylindrical trunk | drum by which the engagement hole was formed in the inside, rigidity can be improved by a bottomed part. In addition, since the bottomed portion is in contact with the closed portion, when the output portion is engaged with the engagement hole, the bottomed portion contacts the closed portion of the case even if the output portion and the engagement hole are in a press-fit relationship. In contact with it, it can receive the stress during press-fitting. Therefore, the output part and the engagement hole can be stably engaged.

  The geared motor according to the present invention has a pair of parallel planes that face each other when the split case bodies are integrated with each other, and the pair of parallel planes support both ends of the output gear. It has a supporting part. Moreover, on one side of the pair of parallel planes, there is an opening that extends in the axial direction from the output gear and through which an output portion that outputs the output of the output gear to the outside of the case is inserted. Therefore, since both ends of the output gear are respectively supported by the support portion, the output portion can be output from any of the pair of parallel planes. Therefore, in the opening and closing member on the left side of the opening and closing member whose left and right opening and closing members operate so as to drive the door that is double-opened, the output portion is output from one side of the pair of parallel planes. By using a geared motor and using a geared motor with the output part output from the other side of the pair of parallel planes on the right open / close member, the output of the output part is hardly changed. By simply changing the direction, it is possible to drive the opening / closing member whose rotational center moves symmetrically. Therefore, even if the opening / closing member operates so that the rotation center of the opening / closing member is bilaterally symmetric, it can be shared by a substantially common unit. Therefore, there is no cost increase and complicated handling. Furthermore, since the side where the output part is not output among the pair of parallel planes is closed at least in the axial direction of the output gear so that the output gear is not exposed to the outside, the geared motor due to dust intrusion or entrainment In addition to preventing malfunctions, the external appearance is not impaired even if it is exposed to the outside.

  Embodiments of the present invention will be described below with reference to the drawings.

[First embodiment]
(overall structure)
FIGS. 1A and 1B are a perspective view of a refrigerator provided with a geared motor to which the present invention is applied as viewed obliquely from above, and an enlarged view showing a part thereof. 2A, 2B, and 2C are a front view, a right side view, and a rear view, respectively, of the geared motor according to the first embodiment to which the present invention is applied.

In FIG. 1, the refrigerator 1 of this embodiment has a pair of double-open doors 5 and 6 that open and close the opening 7. Moreover, in the refrigerator 1 of this form, the geared motor 10 for performing the opening / closing operation | movement automatically with respect to the door 5 is comprised in the upper surface. That is, the door 5 is connected to the refrigerator main body 2 via the geared motor 10 so that the opening 7 of the refrigerator main body 2 can be opened and closed. As shown in FIG. 2, the geared motor 10 has a substantially L portion having a portion 10b extending in the lateral direction and a rising portion 10a extending upward therefrom when viewed from the front (in the axial direction of the cylindrical body 40a). It has a letter-shaped case 36, and an L-shaped laterally extending portion 10b is fixed to the refrigerator body.

In the case 36, an engagement hole 11 is formed at the center of the upper end of the rising portion 10a to engage a rotation shaft (not shown) connected to the doors 5 and 6, and the doors 5 and 6 are engaged. Hole 11
Can be rotated around the center of rotation.

  In FIG. 1, the geared motor 10 of the present embodiment is fixed to the refrigerator main body with the engagement hole 11 facing upward, and the engagement hole 11 connected to a shaft (not shown) as an output unit fixed to the door 5 has its axis line. The door is driven to open and close by rotating around.

(Internal structure of geared motor)
FIG. 3 is an explanatory view of the geared motor shown in FIG. 2 when the layout of various parts constituting the drive mechanism excluding the DC motor is viewed from the front side. 4 is an AA development view of various parts constituting the drive mechanism shown in FIG. 3 in the geared motor shown in FIG. FIGS. 5A and 5B show the geared motor shown in FIG. 2 when the case body is removed by AA shown in FIG. 3 and various components constituting the drive mechanism are viewed obliquely from above. It is the perspective view which shows a mode, and the oblique view which shows a mode when it sees from the diagonal lower surface side.

  As shown in FIGS. 3 and 4, the geared motor 10 according to the first embodiment to which the present invention is applied includes a DC motor 60 that can rotate in both forward and reverse directions as a drive source, and the rotation of the DC motor 60. A speed reduction wheel train that decelerates and transmits the output wheel and an output vehicle 40 that is rotationally driven via the speed reduction wheel train are disposed inside a case 36 that is a divided case body of an upper case 35 and a lower case 37. Yes. The upper case 35 is divided into an upper case body 35a and a cover 35b. The upper case 35 and the lower case 37 have a pair of parallel flat surfaces 35c and 37c (see FIG. 4) that face each other when the case bodies 35 and 37 are integrated.

  In a driving force transmission path from the pinion 61 fixed to the rotor shaft of the DC motor 60 to the output gear 40, a reduction gear train that decelerates the rotation of the DC motor 60 and transmits it to the output gear 40 is disposed. The reduction gear train includes a first reduction gear 70 having a large-diameter gear that meshes with the pinion gear 61, and a second reduction gear 71 having a large-diameter gear that meshes with a small-diameter gear of the first reduction gear 70. A third reduction gear 72 having a large diameter gear meshing with the small diameter gear of the second reduction gear 71 and a fourth diameter gear having a large diameter gear meshing with the small diameter gear of the third reduction gear 72. A reduction gear 73 and a fifth reduction gear 74 having a large diameter gear meshing with the small diameter gear of the fourth reduction gear 73 are provided. The small diameter gear of the fifth reduction gear 74 is the output gear 40. Is engaged. Further, in the first embodiment, the output gear 40 is integrally formed with a cylindrical body 40a extending in the axial direction from one side surface thereof, and the tip end side thereof is a flat surface 37c of the lower case 37. A bearing 38 a serving as a support portion is rotatably supported via a slide bearing 41.

  On the other hand, the other side surface of the output gear 40 has a groove 40b formed continuously along the circumferential direction for providing a bearing portion 38b as a support portion formed on the flat surface 35c of the upper case body 35. The inner wall of the groove 40b is rotatably supported on the inner wall of the bearing portion 38b via an O-ring 42. The cylindrical body 40a is formed in a bottomed cylindrical shape in which the other side surface of the output gear 40 is opened, and the engagement hole 11 is configured. That is, the cylindrical body portion 40a has the proximal end side of the output gear 40 that is one side in the axial direction opened so that the engagement hole 11 is engaged with the output portion, and the distal end of the output gear 40 that is the other side in the axial direction. It is formed in a bottomed cylindrical shape having a bottomed portion 40 c that is closed on the side, and this bottomed portion 40 c is in contact with a closed portion 37 d of the lower case 37.

  The first reduction gear 70 includes a large-diameter gear member 70a in which a large-diameter gear is formed, a small-diameter gear member 70b in which a small-diameter gear is formed, and a pair of leaf springs 70c. The small-diameter gear member 70b is formed in a columnar shape. A small-diameter gear is formed on the outer peripheral surface on one side in the axial direction, and a large-diameter gear member formed in a cylindrical shape on the outer peripheral surface on the other side. The inner peripheral surface of 70a is a support portion that is rotatably supported.

The large-diameter gear member 70a is formed in a cylindrical shape, a through hole penetrating in the axial direction is formed at the center in the radial direction, and a pair of leaf springs 70c are fixed to the inner peripheral surface side thereof. . The pair of leaf springs 70c are opposed to each other in the radial direction via a gap of a predetermined interval, and a support portion for the small-diameter gear member 70b is disposed in the gap, so that the pair of leaf springs 70c.
It is pinched by. That is, the gap is formed below the outer diameter of the support portion of the small diameter gear member 70b. Therefore, the small diameter gear member 70b can be rotated integrally with the large diameter gear member 70a by sandwiching the support portion of the small diameter gear member 70b in the gap. On the other hand, when the small-diameter gear member 70b is overloaded and locked, the large-diameter gear member 70a is allowed to rotate against the frictional force between the support portion of the small-diameter gear member 70b and the pair of leaf springs 70c. It is like that. As described above, the first reduction gear 70 is normally formed of the small-diameter gear member 7.
0b and the large-diameter gear member 70a are rotated together and function as one gear of the reduction gear train, but when the small-diameter gear member 70b is overloaded and locked, it can be rotated only by the large-diameter gear member 70a. It is a gear that also functions as a torque limiter.

  Further, the second reduction gear 71 and the fourth reduction gear 73 are overlapped in the axial direction, and both ends are parallel to the pair of parallel cases of the case bodies 35 and 37 in the hollow portions formed in both the reduction gears 71 and 73, respectively. A support shaft 32 supported by the planes 35c and 37c is inserted, and both reduction gears 71 and 73 are rotatably supported around the support shaft 32. Further, the third reduction gear 72 and the fifth reduction gear 74 are superposed in the axial direction, and both ends are parallel to a pair of parallel cases of the case bodies 35 and 37 in the hollow portions formed in both the reduction gears 72 and 74, respectively. A bearing shaft 33 that is pivotally supported on the flat surfaces 35c and 37c is inserted, and both gears 72 and 74 are supported around the bearing shaft 33 so as to be rotatable. Note that the support shaft 31 having both ends supported by a pair of parallel planes 35c and 37c of the case bodies 35 and 37 is inserted into the hollow portion formed in the first reduction gear 70. It is supported so that it can rotate around. In the case of this embodiment, the support shafts 31, 32, and 33 are all arranged in parallel. The bearing shaft 32 and the bearing shaft 33 are formed in the same shape.

  In the first embodiment, of the pair of parallel planes 35c and 37c that face each other when the upper case 35 and the lower case 37 are integrated, a bearing that supports one end of the support shafts 32 and 33 on the plane 35c side. It has the support part 34b with which the rear-end side of the DC motor 60 arrange | positioned close | similarly has the parts 36b and 37b. Further, the flat surface 37c includes support portions 36a and 37a that support the other ends of the support shafts 32 and 33, and a support portion 34a that supports the front end side of the DC motor 60 that is disposed in the vicinity. Therefore, the DC motor 60 is disposed such that its rotor shaft is parallel to the support shafts 32 and 33. In this embodiment, the upper case 35 is divided into an upper case body 35a and a cover 35b, and support portions 36b and 37b for supporting one end of the support shafts 32 and 33 are provided on the plane side of the upper case body 35a. And a support portion 34b for supporting the rear end side of the DC motor on the plane side of the cover 35b.

  As shown in FIG. 4, a sensor gear 75 that meshes with the small-diameter gear of the fourth reduction gear 73 is disposed on the side wall side of the DC motor 60. The sensor gear 75 is integrally formed with a support shaft 80, and one end of the support shaft 80 projects from the substrate 76 to the back side. One end of the protruding support shaft 80 has a D-shaped cross section, and a D-shaped hole of the potentiometer 77 is fitted therein. Therefore, when the support shaft 80 of the sensor gear 75 rotates, a rotary unit (not shown) of the potentiometer 77 rotates integrally. One of the support shafts 80 of the sensor gear 75 is supported by a bearing portion 39a formed on a center plate 79 disposed in the case body 36, and the other is supported by a bearing portion 39b formed on the cover 35b. Thus, the sensor gear 75 is rotatable. The center plate 79 is formed in parallel with the pair of parallel planes 35c and 37c, and is formed integrally with the upper case body 35a in consideration of improvement in assembling workability. Note that one end side of the support shaft 31 that pivotally supports the first reduction gear 70 is pivotally supported by a bearing portion 30 b formed on the center plate 79.

Here, the sensor gear 75 is configured with the number of teeth so that the rotation of the sensor gear 75 can be accommodated in less than one rotation while the toilet lid 6 drives the entire range by the output gear 40. Therefore, potentiometer 7
7 outputs a signal corresponding to the angular position of the support shaft 80 of the sensor gear 75, so that the rotational position of the cylindrical trunk 40a, that is, the rotational position of the toilet lid 6 can be detected.

(Layout of each mechanical component and its effect)
In disposing such a drive mechanism in the case body 35, in the first embodiment, as shown in FIG. 3, the first reduction gear 70 supported on the support shaft 31 of the reduction gear train, the support shaft, as shown in FIG. The second and fourth reduction gears 71 and 73 supported by the shaft 32, the third and fifth reduction gears 72 and 74 supported by the support shaft 33, and the output gear 40 are directed toward the output gear 40 located above the second and fourth reduction gears 71 and 73. The columns are arranged in this order from the bottom. Therefore, the first reduction gear 70, the second and fourth reduction gears 71 and 73, the third and fifth reduction gears 72 and 74, and the output gear 40 are output gears as is apparent from FIG. When viewed from the axial direction of the 40 cylindrical body portions 40a, they are arranged in a space having a width dimension substantially the same as the outer diameter dimension of the lower case 37.

  Accordingly, in the lower case 37, the first reduction gear 70, the second and fourth reduction gears 71, 73, the third and the second reduction gears are formed on the rising portion 10a having a narrow width when viewed from the axial direction of the cylindrical body 40a. Five reduction gears 72 and 74 and the output gear 40 can be accommodated. Therefore, as shown in FIG. 1, since it does not protrude greatly in the width direction (W) in the refrigerator compartment, it is possible to improve the degree of freedom of design such as storage in the cabinet and enhance the design in the cabinet without impairing the aesthetics. Can do.

Further, the second and fourth reduction gears 71 and 73, and the third and fifth reduction gears 72 and 74 are arranged in a narrow rising portion 10a having a width dimension substantially the same as the outer diameter dimension of these reduction gears. At that time, the height dimension (vertical direction in FIG. 3) of the lower case 37 becomes longer as it is,
In the present embodiment, as described below, each component is arranged compactly in the height dimension of the lower case 37, so that the height dimension can be compressed even when the case body 35 including the rising portion 10a is used.

That is, the second reduction gear 71 and the fourth reduction gear 73 are overlapped in the axial direction, and the third reduction gear 72 and the fifth reduction gear 74 are overlapped in the axial direction. Therefore,
In this embodiment, by utilizing such an overlap, each component is arranged compactly in the height dimension of the lower case 37, and the height dimension is compressed.

(Geared motor assembly procedure)
6A, 6B, 6C, and 6D are explanatory diagrams for explaining the assembly procedure of the geared motor shown in FIG.

  The assembly procedure for assembling the geared motor according to the first embodiment is as follows. That is, as shown in FIG. 6 (A), bearing shafts 31, 32, 33 are pivotally supported on bearing portions 30a, 36a, 37a of the flat surface 37c of the lower case 37, respectively, and thereafter, the bearing shafts 31, 32, 33 are The first reduction gear 70, the second reduction gear 71, and the third reduction gear 72 are supported in this order.

Next, as shown in FIG. 6B, the fourth reduction gear 73 and the fifth reduction gear 74 are
The support shafts 32 and 33 are supported in this order, and then the output gear 40 is moved to the bearing portion 38 of the lower case 37.
Drop it into a.

Thereafter, as shown in FIG. 6C, after covering the upper case body 35a from above the lower case 37, the sensor gear 75 is dropped into the bearing portion 39a formed on the center plate 79 and the DC motor 60 is lowered. Drop into the support portion 34 a of the case 37.

Finally, as shown in FIG. 6D, the substrate 76 on which the potentiometer 77 is mounted is dropped, covered with the cover 35b, and the upper case body 35a and the cover 35b are fixed to the lower case 37 using the tapping screws 78. The assembly of the geared motor 10 is completed.

[Second Embodiment]
FIG. 7 is a developed view showing the layout of various components constituting the drive mechanism in the geared motor according to the second embodiment to which the present invention is applied, in accordance with FIG.

  Next, a second embodiment will be described. In addition, the same code | symbol is attached | subjected to the member same as the member in 1st Embodiment, and the description is abbreviate | omitted.

  In the first embodiment, the cylindrical body 40a of the output gear 40 is formed in a bottomed cylindrical shape with the other side surface of the output gear 40 opened to form the engagement hole 11. In the second embodiment shown in FIG. 7, on the contrary, the engagement hole 11 ′ is formed by forming a cylindrical body with a bottom opening the front end side of the cylindrical body 40a ′. That is, the cylindrical body 40a ′ has an opening on the tip side of the output gear 40 ′ that is the other side in the axial direction and the output gear 40 that is on one side in the axial direction because the engagement hole 11 ′ is engaged with the output portion. It is formed in a bottomed cylindrical shape having a bottomed portion 40 c ′ whose base end side is closed, and this bottomed portion 40 c ′ is in contact with a closed portion 37 d ′ of the upper case 35. The configuration when such an output gear 40 ′ is used is the same as that of the first embodiment except for the configuration around the output gear 40 ′ and its bearing portion.

  The bearing portions 38a ′ and 38b ′ of the second embodiment are different from the first embodiment in that the outer wall on the front end side of the cylindrical body portion 40a ′ is the O-ring 42 on the inner wall of the bearing 38a ′. It is pivotally supported via '. On the other hand, the inner wall of the bottomed cylindrical portion 40b ′ formed on the other side surface of the output gear 40 is rotatably supported on the outer wall of the bearing 38b ′ via a slide bearing 41 ′. Here, geared motor 10 'of 2nd Embodiment is being fixed in the upper surface of the refrigerator 1 shown in FIG. 1 so that the door 6 may be opened and closed automatically although it is not illustrated. That is, the door 6 is connected to the refrigerator main body 2 via the geared motor 10 'so that the opening 7 of the refrigerator main body 2 can be opened and closed. The geared motor 10 ′ is fixed to the refrigerator body with the engagement hole 11 facing upward like the geared motor 1 of the first embodiment, and is illustrated as an output unit fixed to the door 6. The engagement hole 11 ′ to which the shaft not to be connected is rotationally driven around its axis to open / close the door.

(Main effects of the first embodiment and the second embodiment)
As described above, each of the upper case 35 and the lower case 37 has a pair of parallel planes 35c and 37c facing each other when the upper case 35 and the lower case 37 are integrated, and the pair of parallel planes 35c, 37c has support portions for supporting both ends of the output gear 40, respectively. Specifically, in the first embodiment, the distal end side of the cylindrical body portion 40 a of the output gear 40 is pivotally supported via the slide bearing 41 on the bearing portion 38 a formed on the flat surface 37 c of the lower case 37. On the other hand, the other side surface of the output gear 40 has a groove 40b continuously formed along the circumferential direction for internally installing a bearing portion 38b formed on the flat surface 35c of the upper case body 35. The inner wall is pivotally supported on the inner wall of the bearing portion 38b. Further, in the second embodiment, the bearing portions 38a ′ and 38b ′ are supported on the inner wall of the bearing 38a ′ with the outer wall on the front end side of the cylindrical body 40a ′ opposite to the first embodiment. Has been. On the other hand, the inner wall of the bottomed cylindrical portion 40b ′ formed on the other side surface of the output gear 40 is rotatably supported on the outer wall of the bearing 38b ′ via a slide bearing 41 ′. Moreover, in the case of the first embodiment, an opening 35d through which the output portion is inserted is formed in the parallel plane 35c, and in the case of the second embodiment, an opening 35d in which the output portion is inserted through the parallel plane 37c. 'Is formed.

  Therefore, since both ends of the output gears 40 and 40 'are respectively supported by the support portions, as shown in the first and second embodiments, the output portion is any surface of the pair of parallel planes 35c and 37c. Can also be output. Therefore, even if the drive center operates symmetrically as in the case of the doors 5 and 6 that are double-opened, the geared motor 10 shown in the first embodiment is used for the output portion of the right door 5. Use the geared motor 10 shown in the first embodiment and the second embodiment by using the geared motor 10 ′ shown in the second embodiment as the output portion in the left door 6. With the shown geared motor 10 ′, the doors 5 and 6 can be driven by changing the output direction of the output unit without changing the internal configuration of the geared motor 10, 10 ′. Therefore, even when the rotation center operates symmetrically as in the case of the doors 5 and 6, the cost is not increased and the handling thereof is not complicated by using the almost common common unit.

  Furthermore, in the geared motors 10 and 10 'shown in the first and second embodiments, the output gears 40 and 40' are exposed to the outside on the side of the pair of parallel planes 35c and 37c where the output portion is not output. Therefore, at least the axial direction of the output gears 40, 40 ′ is closed by the closing portions 37d, 37d ′, so that malfunction due to intrusion and entrainment of dust is prevented and the appearance and appearance are not impaired. Moreover, even if it is used around water, such as in the kitchen or sanitary field, it is possible to prevent moisture from entering.

  In both the first and second embodiments, the output gears 40, 40 ′ are formed in the axial direction at the center of rotation and separately from the output gears 40, 450 ′. The output portion has cylindrical body portions 40a and 40a ′ having engagement holes 11 and 11 ′ to be inserted and engaged through the openings 35d and 35d ′, and the cylindrical body portions 40a and 40a ′. Has bottomed portions 40c and 40c ′ in which the axial ends of the engagement holes 11 and 11 ′ are closed, and the bottomed portions 40c and 40c ′ are in contact with the closed portions 37d and 37d ′. Therefore, even if it is cylindrical trunk | drum 40a, 40a 'by which engagement hole 11, 11' was formed in the inside, rigidity can be improved by bottomed part 40c, 40c '. Moreover, since the bottomed portions 40c and 40c ′ are in contact with the closed portions 37d and 37d ′, when the output portion is engaged with the engagement holes 11 and 11 ′, the output portion and the engagement holes 11 and 11 ′ are formed. Even in the press-fitting relationship, the bottomed portions 40c and 40c ′ can contact the closing portions 37d and 37d ′ of the case 36 as a rigid body, and can receive stress during press-fitting. Therefore, the output portion and the engagement holes 11 and 11 ′ can be stably engaged.

(Other embodiments)
In the above embodiment, the L-shaped case 36 is used when viewed from the axial direction of the cylindrical body portions 40a, 40a ′. However, the case 36 is not limited to the L-shape. Moreover, in the said form, although it has comprised so that the doors 5 and 6 of the refrigerator 1 may be opened and closed by the geared motors 10 and 10 ', it is not limited to the doors 5 and 6 of the refrigerator 1, It can be used for various purposes in which the drive center operates symmetrically. For example, you may comprise so that the rotating shaft for opening and closing the door of storage shelves, such as a system kitchen and a cupboard, may be driven. In addition, in the said form, although the engagement holes 11 and 11 'are formed in the geared motors 10 and 10' side, an engagement hole is formed in the doors 5 and 6 side, and the rotation engaged with this engagement hole is carried out. The shaft may be formed on the geared motor 10, 10 'side.

(A), (B) is the perspective view which looked at the refrigerator provided with the geared motor to which this invention was applied from diagonally upward, and the enlarged view which extracts and shows the part. (A), (B), (C) is a front view, a right side view, and a rear view, respectively, of the geared motor according to the first embodiment to which the present invention is applied. In the geared motor shown in FIG. 2, it is explanatory drawing when the layout of the various components which comprise the drive mechanism except a DC motor is seen from the front side. FIG. 4 is an AA development view of various components constituting the drive mechanism shown in FIG. 3 in the geared motor shown in FIG. 2. (A) and (B) are perspective views showing the geared motor shown in FIG. 2 when the case body is removed by AA shown in FIG. 3 and various components constituting the drive mechanism are viewed obliquely from above. It is an oblique view which shows a figure when it sees from a figure and the diagonally lower surface side. (A), (B), (C), (D) is explanatory drawing for demonstrating the assembly procedure in the geared motor shown in FIG. FIG. 5 is a developed view showing the layout of various components constituting the drive mechanism in the geared motor according to the second embodiment to which the present invention is applied, in accordance with FIG. 4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Refrigerator main body 5, 6 Door 7 Opening 10, 10 'Geared motor 11 Engagement hole 31, 32, 33 Bearing shaft 35 Upper case (divided case body)
35a upper case body 35b cover 35c plane 35d, 35d 'opening 36 case 37 lower case (divided case body)
37c Plane 37d, 37d 'Closure part 38a, 38b, 38a', 38b 'Bearing part (support part)
40 Output gear 40a, 40a 'Cylindrical body part 40c, 40c' Bottomed part 60 DC motor (motor)

Claims (3)

In a geared motor having a motor and an output gear that outputs rotation from the motor,
A pair of divided case bodies internally having the motor and the output gear; and the divided case bodies are integrated into each of the plurality of divided case bodies; The pair of parallel planes have support portions that respectively support both ends of the output gear, and one side of the pair of parallel planes extends from the output gear in the axial direction, and the output An output portion for outputting the output of the gear to the outside of the case is inserted, and at least the axial direction of the output gear is closed so that the output gear is not exposed to the outside on the other side of the pair of parallel planes Geared motor characterized by being closed by a part.   3. The output gear according to claim 1, wherein the output gear extends in the axial direction at the center of rotation thereof, and the output portion formed separately from the output gear is inserted and engaged through the opening. A geared motor comprising a cylindrical body having a joint hole. 3. The bottomed cylindrical body according to claim 2, wherein the cylindrical body portion has a bottomed portion that opens on one side in the axial direction and closes the other side in the axial direction so that the engagement hole engages with the output portion. A geared motor formed, wherein the bottomed portion is in contact with the closing portion.

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