Opening / closing body motor unit

Abstract

To provide an opening / closing body motor unit for operating a door vehicle door lock, which is in particular configured to reduce its operation noise.SOLUTION: A an opening / closing body motor unit for operating a door vehicle door lock features such that a housing of the opening / closing body motor unit is made up of a case and a cover, a motor and a speed reduction mechanism including a worm wheel are arranged in the case, the motor and the speed reduction mechanism are respectively housed in a concave portion for the motor and a concave portion for the speed reduction mechanism formed in the case, the direction of the axis of the motor and the direction of advance and retreat of a transmission member linked to the speed reduction mechanism are the same, and a reinforcing rib is provided in a portion which does not overlap the concave portion for the speed reduction mechanism on the outer surface of the case.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a motor unit for an opening / closing body that operates a door lock of a vehicle door, and more particularly to a motor unit for an opening / closing body that reduces its own operating noise. [Background technology]

[0002] Conventionally, a motor unit has been disclosed as a winding device for a vehicle seat, as in Patent Document 1. In Patent Document 1, a motor 110, a first worm 120, a first worm wheel 130, and a second worm 140 are housed in a case body 101 and a cover 102. However, no measures are taken to reduce the operating noise of the motor unit itself.

[0003] Furthermore, as a motor unit, Patent Document 2 discloses an electric drive unit 3. Patent Document 2 discloses a configuration in which a buffer member 13 is used to block the transmission of vibration from a reduction gear device 9 to a base 8, i.e., to a swing door 1. However, as in Patent Document 1, it is difficult to say that measures are taken to reduce the operating noise of the motor unit itself. Meanwhile, as opening and closing bodies are increasingly being electrified, there is a demand for reducing the operating noise of the opening and closing body motor unit itself that operates the door lock. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2015-120455 A [Patent Document 2] JP 2000-080838 A Summary of the Invention [Problem to be solved by the invention]

[0005] In view of the above problems, the present invention relates to a motor unit for an opening / closing body that operates a door lock of a vehicle door, and in particular, has an object to provide a motor unit for an opening / closing body that reduces its own operating noise. [Means for solving the problem]

[0006] According to the present invention, the above problems are solved as follows. (1) A first aspect of the present invention is a motor unit for an opening / closing body that operates a door lock of a vehicle door, the housing of the motor unit for an opening / closing body being composed of a case and a cover, A motor and a reduction mechanism including a worm wheel are disposed in the case, the motor and the reduction mechanism are accommodated in a motor recess and a reduction mechanism recess formed in the case, respectively, and a motor axial direction and a forward and backward direction of a transmission member linked to the reduction mechanism are the same; The motor unit for an opening / closing body is characterized in that a reinforcing rib is provided on the outer surface of the case in a portion that does not overlap with the recess for the reduction mechanism.

[0007] When the motor inputs power, the flat surface of the case will vibrate greatly, but by providing reinforcing ribs on the outer surface of the case that make up the flat surface as a whole excluding the recess for the reduction mechanism, rigidity can be increased and the housing can be prevented from resonating with the motor, thereby effectively suppressing vibrations and reducing the operating noise of the motor unit for the opening / closing body itself.

[0008] (2) A second invention is a motor unit for an opening / closing body as described in (1) above, characterized in that the reinforcing rib provided on the outer surface of the case is provided at a position connecting the vicinity of a plurality of vehicle panel fastening points at which the housing is fastened to the vehicle panel, and / or connecting the vicinity of the vehicle panel fastening points with the vicinity of the outlet of the transmission member.

[0009] Vibrations can be more effectively suppressed by placing reinforcing ribs between the vicinity of the vehicle panel fastening points which serve as fixed points, and / or at positions connecting the vicinity of the vehicle panel fastening points which serve as fixed points and the vicinity of the outlet of the transmission member which has no fixed points.

[0010] (3) A third aspect of the present invention is a motor unit for an opening / closing body that operates a door lock of a vehicle door, the housing of the motor unit for an opening / closing body being composed of a case and a cover, A motor and a reduction mechanism including a worm wheel are disposed in the case, and the cover is provided with a motor protrusion for covering the motor and a reduction mechanism support point center protrusion for covering a reduction mechanism support point center which is an element for supporting a rotation shaft of the reduction mechanism, and the motor axial direction and the forward and backward direction of a transmission member linked to the reduction mechanism are configured to be the same, This motor unit for an opening / closing body is characterized in that the reinforcing ribs provided on the outer surface of the cover are arranged radially from the central protrusion of the reduction mechanism support point of the cover to connect the vicinity of multiple vehicle panel fastening points where the housing is fastened to the vehicle panel, and / or are arranged to pass near the exit of the transmission member.

[0011] Since the cover deforms from the protrusion for supporting the reduction mechanism at the center, by arranging the reinforcing ribs radially from the protrusion for supporting the reduction mechanism at the center, the rigidity of the cover is increased and vibrations are more effectively suppressed.

[0012] (4) The fourth invention is a motor unit for an opening / closing body as described in (3) above, characterized in that a housing fastening point for fastening to the case is provided on the cover side at a position that does not overlap with the reduction mechanism and the motor, and the reinforcing rib is arranged on the outer surface of the cover so as to straddle the housing fastening point.

[0013] By providing a housing fastening point on the outer surface of the cover on a flat portion that does not overlap the reduction mechanism and the motor, and by arranging a reinforcing rib across this housing fastening point, the rigidity of the cover can be more effectively increased.

[0014] (5) The fifth invention is a motor unit for an opening / closing body as described in (1) or (2), characterized in that the height of the reinforcing rib provided on the outer surface of the case is set so as not to exceed the height of the recess for the reduction mechanism of the case.

[0015] By setting the height of the reinforcing ribs on the outer surface of the case so as not to exceed the height of the recess for the reduction gear mechanism in the case, the rigidity of the case can be increased without sacrificing the ability to be mounted in a vehicle.

[0016] (6) The sixth invention is a motor unit for an opening / closing body as described in (3) or (4) above, characterized in that the height of the reinforcing rib provided on the outer surface of the cover is set so as not to exceed the height of the motor protrusion of the cover.

[0017] By setting the height of the reinforcing ribs provided on the outer surface of the cover so as not to exceed the height of the motor projection of the cover, the rigidity of the cover can be increased without sacrificing mountability in a vehicle.

[0018] (7) The seventh invention is a motor unit for an opening / closing body as described in (2) above, characterized in that a cushioning member is provided around the vehicle panel fastening point, and the cushioning member has a vehicle panel contact surface extending radially from the vehicle panel fastening point to reduce the contact area with the vehicle panel.

[0019] By reducing the contact area between the motor unit for the opening / closing body and the vehicle panel, the sound transmitted to the vehicle panel can be reduced, and the sound emitted from the vehicle panel can be reduced, improving quietness. Effect of the Invention

[0020] According to the motor unit for an opening / closing body of the present invention, the flat surface of the case vibrates greatly in response to the input of the motor, but by providing reinforcing ribs on the flat surface of the case other than the recess for the reduction mechanism on the outer surface of the case, the rigidity of the case can be increased and the case can be prevented from resonating with the motor. Furthermore, since the outer surface of the cover deforms from the convex part for the support point of the reduction mechanism, by providing reinforcing ribs radially from the convex part for the support point of the reduction mechanism, the rigidity of the cover can be increased and the cover can be prevented from resonating with the motor. In this way, the vibration of the case and cover can be effectively suppressed and the operating noise of the motor unit for an opening / closing body itself can be reduced. [Brief description of the drawings]

[0021] [Figure 1] 13 is a diagram showing the internal configuration of the motor unit for opening / closing body when the case is removed and the motor unit is placed in the cover. FIG. [Diagram 2] 13 is a diagram showing the internal configuration of the motor unit for opening / closing body when the cover is removed and the motor unit is placed in the case. FIG. [Diagram 3] 1A to 1C are diagrams showing an embodiment of reinforcing ribs on the case side of a motor unit for an opening / closing body according to the present invention. [Figure 4] 1A to 1C are diagrams showing an embodiment of reinforcing ribs on the cover side of a motor unit for an opening / closing body according to the present invention. [Diagram 5] 4 is a diagram showing the height relationship between a reinforcing rib and a reduction gear mechanism recess shown in FIG. 3. FIG. [Figure 6] 5 is a diagram showing the height relationship between the reinforcing ribs on the cover side and the motor convex portion shown in FIG. 4. [Figure 7] 13 is a diagram showing the cushioning member and the vehicle panel contact surface on the inside of the bush mount of one of the three vehicle panel fastening points on the case side. FIG. [Figure 8] 8 is a vertical sectional side view showing the configuration of the buffer member and the vehicle panel contact surface shown in FIG. 7, and a fastening member attached from the vehicle panel side. FIG. [Figure 9] FIG. 1 is a diagram showing a contact state between a motor and a transmission member installed in a housing of the prior art and their surroundings. [Figure 10]In the cross-sectional view taken along line BB in FIG. 2, (a) shows the relationship between the rotating shaft and its surroundings when rotating under no load, and (b) shows the relationship between the rotating shaft and its surroundings when rotating under load. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiment described below, and includes appropriate modifications of the embodiment described below within the scope obvious to those skilled in the art.

[0023] Fig. 1 shows the internal structure of the motor unit 1 for an opening / closing body when the case 100 is removed and the motor unit 1 is housed in the case 200, and Fig. 2 shows the internal structure of the motor unit 1 for an opening / closing body when the cover 200 is removed and the motor unit 1 is housed in the case 100. The motor unit 1 for an opening / closing body is made up of the case 100 and the cover 200, which form a housing. The case 100 and the cover 200 are made of a resin material. The cover 200 is made of a softer material than the case 100. The case 100 is made of, for example, PBT (polybutyleneterephtalate), and the cover 200 is made of, for example, PP (polypropylene).

[0024] Case 100 is made of a slightly hard PBT and houses the reduction gear mechanism (worm 22, worm wheel 23, relay gear 24, output gear 25) described below, and has the strength to support them and to attach them to the vehicle panel via vehicle panel fastening points 171, 172, 173. Cover 200 also supports the gears, but provides secondary support in terms of strength compared to case 100. Cover 200 is made of PP, which is softer than case 100, and can absorb vibrations and noise. It can also be made lighter.

[0025] A motor 11, a rotating shaft 21, a worm 22, a worm wheel 23, a relay gear 24, and an output gear 25 are provided inside a housing formed by the case 100 and the cover 200. Fig. 1 shows the internal configuration of the motor unit 1 for an opening / closing body when the case 100 is removed, but during actual assembly, it is placed in the case 100 shown in Fig. 2.

[0026] The worm wheel 23 is driven by the worm 22 of the motor 11. The intermediate gear 24 is coaxial with the worm wheel 23 and rotates integrally with the worm wheel 23. The output gear 25 is driven by the intermediate gear 24. The transmission member 31 is linked to the output gear 25, and the transmission member 31 is sent out or wound in the forward and backward directions by the rotation of the output gear 25. The forward and backward movement of the transmission member 31 is achieved by the rotation of the motor 11 being reduced in speed and transmitted by the worm wheel 23 and the output gear 25. As shown in Figs. 1 and 2, a configuration is adopted in which the direction of the rotating shaft 21 of the motor 11 and the forward and backward direction of the transmission member 21 linked to the output gear 25 are the same.

[0027] Here, the conventional technology adopted in the present application when installing a motor inside a housing composed of a case and a cover will be described. FIG. 9 shows the internal configuration of the case 34 in FIG. 7 of JP 2021-195795 A. Paragraph

[0034] of the specification of JP 2021-195795 A states, "The main body storage chamber 62 and the arc-shaped protrusion 64 are also provided in the cover 36 (see FIG. 4). The main body storage chambers 62 of the case 34 and the cover 36 are combined to store the entire main body 52. ​​The arc-shaped protrusions 64 of the case 34 and the cover 36 abut against a wide range of the circumferential surface of the main body 52, preventing the main body 52 from moving or vibrating in the circumferential direction. In addition, the arc-shaped protrusions 64 improve the rigidity of the case 34 and the cover 36, preventing vibration and resonance due to the motor 38 or other external forces."

[0028] Furthermore, with regard to the support of the rotating shaft 54 ​​of the motor 38, paragraph

[0040] of the specification of JP 2021-195795 A states, "A pair of third support pieces (shaft tip support portions) 72 are integrally molded with the case 34. The pair of third support pieces 72, together with a bottom portion 74a between them, support three sides of the tip of the rotating shaft 54. The pair of third support pieces 72 and the bottom portion 74a may be arc-shaped recesses along the circumferential surface of the rotating shaft 54. The third support pieces 72 and the bottom portion 74a lightly contact the rotating shaft 54 ​​or have a small gap therebetween."

[0029] Thus, in the prior art for installing a motor inside a housing formed by a case and a cover, as shown in the lower part of Figure 9, the motor body is configured within the main body storage chamber 62 formed by the case 34 and the cover 36, with the sides abutting the main body storage chamber 62 but the upper and lower parts not abutting the main body storage chamber 62, and the rotating shaft 54 ​​not abutting the third support piece 72 or the bottom 74a. 10, in the present application, during unloaded rotation in which no load is applied to the motor 11 and the reduction gear mechanism, the rotating shaft 21 does not abut against the third support piece 372 and the bottom 374a, as in the above-mentioned JP 2021-195795 A. However, by abutting the rotating shaft 21 against the third support piece 372 during loaded rotation, the force applied to the teeth of the worm 22 and the worm wheel 23 causes the rotating shaft 21 to bend, thereby preventing the worm 22 from escaping from the worm wheel 23.

[0030] 3 shows one embodiment of reinforcing ribs on the case 100 side of the motor unit 1 for an opening / closing body according to the present invention. The present invention proposes providing reinforcing ribs on the outer surface of the case 100 in order to provide a motor unit 1 for an opening / closing body that reduces the operating noise of the motor unit itself.

[0031] The shape of the outer surface of the case 100 is such that a reduction mechanism recess 121 for accommodating the relay gear 24 and the output gear 25 is raised from the outer surface of the case 100, and the rest of the outer surface of the case 100 is flat, although a motor recess 122 for accommodating the motor 11 is slightly raised from the outer surface of the case 100 (see FIG. 5). The reinforcing ribs are provided on the flat portions excluding the reduction mechanism recess 121.

[0032] The reason why the reinforcing ribs are provided on the flat surface is that when inputting to the motor, the flat surface of the case vibrates significantly, so by providing the reinforcing ribs on the flat surface other than the reduction mechanism recess 121 in which the output gear 25 is housed, the rigidity of the flat surface is increased, thereby preventing the housing from resonating with the motor. This effectively suppresses the vibration of the motor unit 1 for opening / closing body, thereby reducing the operating noise.

[0033] In a configuration in which the motor axial direction A1 in the case 100 and the advancing / retreating direction A2 of the transmission member 31 linked to the output gear 25 are the same, the reinforcing rib is provided on a flat surface portion that does not overlap with the reduction mechanism recess 121. The reinforcing ribs are divided into a plurality of case-side horizontal reinforcing ribs 151 and a plurality of case-side inclined reinforcing ribs 155, 157.

[0034] Case-side horizontal reinforcing ribs 151 are provided at approximately equal intervals on the flat surface portion. The horizontal reinforcing ribs are provided to reinforce the entire case.

[0035] Case-side inclined reinforcement rib 155 is provided at a position connecting the vicinity of vehicle panel fastening points 171, 173 (fixed points) (however, it is not provided in reduction mechanism recess 121). Case-side inclined reinforcement rib 157 is provided connecting the vicinity of vehicle panel fastening point 172 (fixed point) to the vicinity of the outlet of transmission member 31 (see FIG. 1) that has no fixed point. The inclined reinforcement rib is provided to reinforce weak parts of the case.

[0036] 5, the height of the reinforcing ribs on the case side is set so as not to exceed the height of the reduction gear mechanism recess 121 of the case 100. By setting the height of the reinforcing ribs provided on the outer surface of the case so as not to exceed the height of the reduction gear mechanism recess 121, the rigidity of the case 100 can be increased without sacrificing the mountability in a vehicle.

[0037] 4 shows one embodiment of a reinforcing rib on the cover 200 side of the motor unit 1 for an opening / closing body according to the present invention. The present invention proposes providing a reinforcing rib on the cover 200 side as well in order to provide a motor unit 1 for an opening / closing body that reduces the operating noise of the motor unit itself.

[0038] The shape of the outer surface of the cover 200 is such that a reduction mechanism support point center protrusion 221 that covers the reduction mechanism support point center as an element that supports the rotation shaft of the output gear 25 that constitutes one of the reduction mechanism, and a motor protrusion 222 that covers the motor 11 are raised on the outer surface of the cover 200, and the rest of the outer surface of the cover 200 forms a flat surface as a whole (see FIG. 6). The reinforcing ribs are provided on this flat surface.

[0039] The reason why the reinforcing ribs are provided on this flat surface is that, like the case 100, the flat surface of the cover vibrates significantly when inputting power to the motor, so providing the reinforcing ribs on the flat surface other than the reduction mechanism support point center protrusion 221 and the motor protrusion 222 increases the rigidity of the flat surface, thereby preventing the housing from resonating with the motor. This effectively suppresses the vibration of the opening / closing body motor unit 1, reducing the operating noise.

[0040] As with the case 100 side, in a configuration in which the motor axial direction A1 in the cover 200 is the same as the advancing and retreating direction A2 of the transmission member 31 (see FIG. 2) linked to the output gear 25, the reinforcing ribs are provided radially from the reduction mechanism support point center convex portion 221 to connect the vicinity of the vehicle panel fastening points 171, 172, 173, and / or are provided to pass through the vicinity of the transmission member. The types of reinforcing ribs are divided into cover side horizontal reinforcing rib 251 and cover side inclined reinforcing ribs 255, 256, 257.

[0041] A plurality of cover-side horizontal reinforcing ribs 251 are provided at approximately equal intervals on the flat surface portion. The horizontal reinforcing ribs are provided to reinforce the entire case.

[0042] The cover-side inclined reinforcement ribs 256, 257 are arranged so as to straddle the housing fastening point 225 or its vicinity. The housing fastening point 225 refers to a fastening point with the case 100 provided on the outer surface of the cover 200 that does not overlap with the output gear 25 and the motor 11 in the cover 200. By arranging the inclined reinforcement ribs so as to straddle the housing fastening point 225 or its vicinity, the rigidity of the cover can be increased more effectively. The cover-side inclined reinforcement rib 257 is arranged so as to pass near the transmission member 31 that does not have a fixed point, and can reinforce weak parts of the cover more effectively.

[0043] The cover-side inclined reinforcing ribs 255 are a plurality of inclined reinforcing ribs provided radially from the reduction mechanism support point center protrusion 221 to connect the vicinity of the vehicle panel fastening points 171, 172, and 173 on the case side. Since the cover 200 deforms from the reduction mechanism support center 221 to which the case 100 is connected, by arranging the reinforcing ribs radially from the reduction mechanism support center 221, the rigidity of the cover can be increased and vibration can be effectively suppressed.

[0044] 6, the height of the reinforcing rib on the cover side is set so as not to exceed the height of the motor protrusion 222 of the cover 200. By setting the height of the reinforcing rib provided on the outer surface of the cover 200 so as not to exceed the height of the motor protrusion 222 of the cover 200, the rigidity of the cover 200 can be increased without sacrificing the mountability in the vehicle.

[0045] Fig. 7 shows a buffer member 182 and a vehicle panel contact surface 183 on the inside of a bush mount 181 of one vehicle panel fastening point 172 out of three vehicle panel fastening points on the case 100 side. Fig. 8 is a vertical cross-sectional side view showing the configuration of the bush mount 181, the buffer member 182, the vehicle panel contact surface 183, and a fastening screw 185 attached from the vehicle panel 2 side in Fig. 7. The bush mount 181 is threaded, and is screwed into the fastening screw 185 attached from the vehicle panel 2 side to fasten the opening / closing body motor unit 1 to the vehicle panel 2. Note that various rubber materials can be used for the buffer member 182 and the vehicle panel contact surface 183 as long as they are elastic.

[0046] By providing the buffer member 182 around the vehicle panel fastening point, it is possible to prevent the transmission of vibration from the opening / closing body motor unit 1 to the vehicle panel 2. Furthermore, the buffer member 182 is provided with vehicle panel contact surfaces 183 extending radially on the surface of the buffer member 182 in order to reduce the contact area with the bush mount 181 fastened to the vehicle panel 2. In FIG. 7, four vehicle panel contact surfaces 183 extending radially are provided on the surface of the buffer member 182. By providing the vehicle panel contact surfaces 183, the contact area between the bush mount 181 fastened to the vehicle panel 2 and the buffer member 182 is reduced, and the buffer member 182 becomes more flexible, thereby reducing the spring constant, and therefore the sound transmitted to the vehicle panel 2 can be reduced, improving quietness.

[0047] Although the embodiment of the present invention has been described above, the following various modifications, changes, and combinations can be made to the above embodiment without departing from the gist of the present invention.

[0048] The range and number of horizontal reinforcing ribs provided on the case and cover can be changed as appropriate. For example, horizontal reinforcing ribs can be provided only on the upper part of the outer surface of the case and cover, or the intervals between the ribs can be increased or decreased.

[0049] Also, instead of the horizontal reinforcing ribs, vertical reinforcing ribs are employed, or horizontal reinforcing ribs and vertical reinforcing ribs are employed simultaneously.

[0050] The range and number of inclined reinforcing ribs provided on the case side and cover side can be changed as appropriate. For example, more inclined reinforcing ribs can be provided on the upper part of the outer surface of the case and cover, or the intervals between the ribs can be increased or decreased.

[0051] The heights of the horizontal reinforcing ribs and the inclined reinforcing ribs are appropriately changed on the case side within a range not exceeding the height of the reduction gear recess, and on the cover side within a range not exceeding the height of the motor protrusion. Also, several different heights of reinforcing ribs are used on the case side and on the cover side. [Explanation of symbols]

[0052] 1 Motor unit for opening and closing body 2 Vehicle Panel 11 Motor 21 Rotation axis 22 Worm (reduction mechanism) 23 Worm wheel (reduction mechanism) 24 Relay gear (reduction mechanism) 25 Output gear (reduction mechanism) 31 Transmission components 100 cases 121 Recess for reduction mechanism 122 Motor recess 151 Case side horizontal reinforcement rib 155, 157 Case side inclined reinforcement rib 171, 172, 173 Vehicle panel fastening points 181 Bush Mount 182 Cushioning material 183 Vehicle panel contact surface 185 Fastening screw 200 Cover 221 Reduction mechanism support point center protrusion 222 Motor protrusion 225 Housing fastening point 251 Cover side horizontal reinforcement rib 255, 256, 257 Cover side inclined reinforcement rib 372 Third support piece 374a bottom A1 Motor shaft direction A2 Transmission member forward / backward direction

Claims

1. In a motor unit for an opening / closing body that operates a door lock of a vehicle door, a housing of the motor unit for an opening / closing body is composed of a case and a cover, A motor and a reduction mechanism including a worm wheel are disposed in the case, the motor and the reduction mechanism are accommodated in a motor recess and a reduction mechanism recess formed in the case, respectively, and a motor axial direction and a forward and backward direction of a transmission member linked to the reduction mechanism are the same; A motor unit for an opening / closing body, characterized in that a reinforcing rib is provided on an outer surface of the case in a portion that does not overlap with the recess for the reduction mechanism.

2. A motor unit for an opening / closing body as described in claim 1, characterized in that the reinforcing rib provided on the outer surface of the case is provided near a plurality of vehicle panel fastening points where the housing is fastened to a vehicle panel, and / or at a position connecting the vicinity of the vehicle panel fastening points and the vicinity of the outlet of the transmission member.

3. In a motor unit for an opening / closing body that operates a door lock of a vehicle door, a housing of the motor unit for an opening / closing body is composed of a case and a cover, A motor and a reduction mechanism including a worm wheel are disposed in the case, and the cover is provided with a motor protrusion for covering the motor and a reduction mechanism support point center protrusion for covering a reduction mechanism support point center which is an element for supporting a rotation shaft of the reduction mechanism, and the motor axial direction and the forward and backward direction of a transmission member linked to the reduction mechanism are configured to be the same, A motor unit for an opening / closing body, characterized in that the reinforcing ribs provided on the outer surface of the cover are arranged radially from the central protrusion of the reduction mechanism support point of the cover to connect the vicinity of multiple vehicle panel fastening points where the housing is fastened to the vehicle panel, and / or are arranged to pass near the exit of the transmission member.

4. A motor unit for an opening / closing body as described in claim 3, characterized in that a housing fastening point for fastening to the case is provided on the cover side at a position that does not overlap with the reduction mechanism and the motor, and the reinforcing rib is arranged on the outer surface of the cover so as to straddle the housing fastening point.

5. 3. The door latch striker according to claim 1, wherein the height of the reinforcing rib provided on the outer surface of the case is set so as not to exceed the height of the reduction gear mechanism recess of the case.

6. 5. The door latch striker according to claim 3, wherein the height of the reinforcing rib provided on the outer surface of the cover is set so as not to exceed the height of the motor projection of the cover.

7. A motor unit for an opening / closing body as described in claim 2, characterized in that a cushioning member is provided around the vehicle panel fastening point, and the cushioning member has a vehicle panel contact surface extending radially from the vehicle panel fastening point to reduce the contact area with the vehicle panel.

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