Lead wire holding structure and motor

Abstract

A holding portion structure for holding a lead (4) between a first component (1) and a second component (2) assembled with the first component (1) and leading the lead (4) outward from the interior of the first component (1) and the second component (2) comprises: two first recesses (6) arranged in parallel and separated from each other along the extending direction of the lead (4) and having a groove (6G) extending in the extending direction; and a second recess (7) located between the two first recesses (6) in the assembled state of the first component (1) and the second component (2) and having a groove (7G) extending in the extending direction in the opposite direction to the groove (6G) of the first recess (6). In the assembled state, the lead (4) arranged in the groove (6G) of the first recess (6) and the groove (7G) of the second recess (7) is bent and held by the first recess (6) and the second recess (7).

Description

Technical Field

[0001] The present application relates to a holding portion structure for holding a lead wire and a motor to which the holding portion structure is applied. Background Art

[0002] In electronic devices using leads, structures for retaining the leads extending from the interior of the device to the exterior have been proposed. For example, Patent Document 1 discloses an electric motor having a structure for extending leads connected to a circuit board to the exterior via a bushing. The bushing in Patent Document 1 includes a pair of retaining plates that clamp the leads from both sides to retain them. One retaining plate is provided with a retaining groove that holds each lead individually. Furthermore, the other retaining plate is provided with an engaging protrusion that securely holds the lead by pressing a portion of the periphery of the lead received in the retaining groove.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent No. 5967349 Summary of the Invention

[0006] Problems to be solved by the invention

[0007] However, in the structure of the above-mentioned patent document 1, the end of the lead connected to the circuit substrate is retained in the retaining groove of the bushing and the lead led out to the outside extends roughly in a straight line. When a pulling force is applied in the long side direction (extended setting direction) of the lead, the pulling force acts on the connection end connected to the circuit substrate. Therefore, depending on the magnitude of the pulling force, there is a risk that the connection end will fall off from the circuit substrate and break. Therefore, there is room for improvement in the structure of the part that leads the lead to the outside of the device. It should be noted that this issue is not limited to electric motors such as patent document 1, but also occurs in electronic equipment that uses leads.

[0008] The lead holding portion structure and motor of the present application are proposed in view of such a problem, and therefore one of its purposes is to prevent the breakage of the lead wire. It should be noted that this purpose is not limited to the present invention, and another purpose of the present invention is to achieve the effects brought about by the various structures shown in the specific embodiments described below and which cannot be achieved by conventional technologies.

[0009] Solutions to Problems

[0010] The disclosed lead holding structure and motor can be implemented as the following solutions (application examples) to solve at least part of the above-mentioned problems. Solutions 2 to 6 and solutions 8 to 9 are all solutions that can be added as appropriate and can be omitted. Solutions 2 to 6 and solutions 8 to 9 do not disclose any solutions or structures that are essential to the present invention.

[0011] Solution 1. The disclosed lead holding portion structure is a holding portion structure that holds a lead between a first component and a second component combined with the first component and leads the lead outward from the inside of the first component and the second component, wherein the lead holding portion structure comprises: two first recesses, which are arranged in parallel and separated from each other along the extension direction of the lead and have a groove extending in the extension direction; and a second recess, which is located between the two first recesses in the combined state of the first component and the second component and has a groove that is opposite to the groove of the first recess and extends in the extension direction, and in the combined state, the lead arranged in the groove of the first recess and the groove of the second recess is bent and held by the first recess and the second recess.

[0012] Option 2. Based on the above-mentioned Option 1, it is preferred that, in the combined state, the lead is maintained by using one or both of the two opposing corners of the first recess and the second recess on one side and the two opposing corners of the first recess and the second recess on the other side.

[0013] Option 3. Based on the above-mentioned Option 1 or 2, it is preferred that one of the first recess and the second recess is arranged on the first component side, and the other is arranged on the second component side, and the groove width of the recess arranged on the component side where the lead is arranged in the first component and the second component is narrower than that of the recess arranged on the component side where the lead is not arranged.

[0014] Solution 4. In any one of the above-mentioned solutions 1 to 3, preferably, at least one of the first recess and the second recess has a protrusion protruding from the inner surface of the groove.

[0015] Solution 5. In the above-mentioned solution 4, preferably, the protrusion is provided on one or both of two mutually opposing side surfaces of the inner surface of the groove.

[0016] Solution 6. In the above solution 4 or 5, it is preferred that the protrusion has a shape that becomes thinner from the base end toward the tip end.

[0017] Solution 7. The disclosed motor is a motor that applies the lead holding portion structure described in any one of the above-mentioned solutions 1 to 6, wherein the first component is a housing in which the connection object of the lead is arranged, and the second component is an end cover combined with the opening of the housing.

[0018] Solution 8. Based on the above-mentioned Solution 7, preferably, the first recess and / or the second recess are integrally provided on the shell and / or the end cover.

[0019] Solution 9. Based on the above-mentioned Solution 7, it is preferred that the first recess and / or the second recess is provided in a component other than the shell and the end cover, and the other component is respectively assembled on the shell and the end cover.

[0020] Effects of the Invention

[0021] According to the disclosed lead holding structure and motor, the leads are bent and held by the first and second recesses, so even if a pulling force is applied in the extending direction (longitudinal direction) of the leads, breakage of the leads can be suppressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a cross-sectional view for explaining the structure of the lead holding portion according to the embodiment, and is cut along the longitudinal direction of the lead.

[0023] Figure 2 This is an exploded perspective view for explaining the structure of the lead holding portion according to the embodiment, with the leads omitted.

[0024] Figure 3 The figures show a motor to which the lead wire holding portion structure according to the embodiment is applied, (a) is a top view, and (b) is a Figure 3 (a) is a cross-sectional view taken along the AA line.

[0025] Figure 4 It shows Figure 3 Figure 1 shows the main parts of the motor housing, (a) is a top view, (b) is a Figure 4 (a) is a cross-sectional view taken along the line BB.

[0026] Figure 5 It shows Figure 3 Figure 1 shows the main parts of the motor end shield, (a) is a top view, (b) is Figure 5 (a) Cross-sectional view taken along the CC direction.

[0027] Figure 6 The leads are shown by the Figure 3 A cross-sectional view of a motor lead holding structure holding state. DETAILED DESCRIPTION

[0028] Referring to the accompanying drawings, the lead retaining structure and motor according to an embodiment are described. The embodiments described below are merely illustrative and are not intended to exclude various modifications or technical applications not explicitly described in the following embodiments. The various structures of this embodiment can be modified and implemented in various ways without departing from the main purpose. Furthermore, these structures can be selected or discarded as needed, or appropriately combined.

[0029] [1. Lead Wire Retention Structure]

[0030] Figure 1 as well as Figure 2 This is a diagram for explaining the lead wire holding portion structure (hereinafter referred to as "holding portion structure"). Figure 1 As shown, the retaining portion structure is a structure that retains the lead 4 between the first component 1 and the second component 2 combined with the first component 1 and leads the lead 4 outward from the inside of the first component 1 and the second component 2. The end 4a of the lead 4 is connected to a component (hereinafter referred to as the "connection object 5") arranged inside the first component 1 and the second component 2. There is no particular restriction on the number of leads 4. When one lead 4 is connected to the connection object 5, one retaining portion structure is provided. In addition, when multiple leads 4 are connected to the connection object 5, the same number of retaining portion structures as the number of leads 4 are provided. That is, the retaining portion structure is provided for each lead 4.

[0031] The connection object 5 is a component to which the end 4a of the lead wire 4 is connected, and examples thereof include a coil and a circuit substrate. The first component 1 of the present embodiment is a component for configuring (accommodating, assembling) the connection object 5. On the other hand, the second component 2 is a component that is combined (installed, engaged, assembled) with the first component 1, and is a component different from the first component 1. It should be noted that the connection object 5 may also be configured with a second component 2 side. In the state where the first component 1 and the second component 2 are combined (hereinafter referred to as the "combined state"), a docking surface 3 is formed by two surfaces of the two components 1 and 2 that are opposite to or in contact with each other (the surface on the first component 1 side and the surface on the second component 2 side). In the embodiment, the connection object 5 is a component for arranging (accommodating, assembling) the connection object 5. On the other hand, the second component 2 is a component that is combined (installed, engaged, assembled) with the first component 1, and is a component different from the first component 1. It should be noted that the connection object 5 may also be configured with a second component 2 side. In the state where the first component 1 and the second component 2 are combined (hereinafter referred to as the "combined state"), a docking surface 3 is formed by two surfaces of the two components 1 and 2 that are opposite to or in contact with each other (the surface on the first component 1 side and the surface on the second component 2 side). Figure 1 In the figure, the mating surface 3 is schematically shown by a two-dot chain line. It should be noted that the mating surface 3 is not limited to a flat surface but can also be a curved surface. Furthermore, it is not limited to being coplanar and can also be a stepped surface or an inclined surface. The retaining structure is, for example, provided on a portion of the mating surface 3. In this case, a gap is provided in this portion to allow at least the lead wire 4 to pass through.

[0032] like Figure 1 as well as Figure 2As shown, the retaining structure includes two first recesses 6 spaced apart and arranged side by side along the extension direction of the leads 4, and a second recess 7 located between the two first recesses 6 when the first component 1 and the second component 2 are assembled. The "extension direction" referred to here refers to the direction in which the leads 4 extend outward from their end portions 4a at the location where the retaining structure is located (the longitudinal direction of the leads 4 at the location of the retaining structure). Because the second recess 7 is located between the two first recesses 6, the distance separating the two first recesses 6 is set to be longer than the dimension of the second recess 7 in the extension direction.

[0033] The two first recesses 6 are formed by cutting away a portion of a predetermined component (the first component 1, the second component 2, or a component other than these), and each has a groove 6G extending in the extending direction and open in the extending direction. The two first recesses 6 are formed so that each groove 6G is located on a substantially straight line. The lead 4 is arranged in the groove 6G. Figure 2 As shown, each groove 6G is formed by two side surfaces 6Gs and a bottom surface 6Gb facing each other. Figure 2 Each groove 6G shown is formed by connecting the lower ends of two flat side surfaces 6Gs in the figure with a downwardly convex curved bottom surface 6Gb. However, the shape of the groove 6G is not limited to this.

[0034] The second recess 7 is formed by cutting away a portion of a predetermined component (the first component 1, the second component 2, or a component separate from these) relative to the component in which the first recess 6 is provided, and has a groove 7G extending in the extending direction and open in the extending direction. The lead 4 is also disposed in this groove 7G. The groove 7G is formed by two opposing side surfaces 7Gs and a bottom surface 7Gb. Figure 2 The groove 7G shown has a shape in which the upper ends of two planar side surfaces 7Gs in the figure are connected by an upwardly convex curved bottom surface 7Gb, but the shape of the groove 7G is not limited to this.

[0035] The retaining structure is arranged so that the two grooves 6G and 7G are opposite to each other. Figure 1As shown, in the combined state, the lead 4 arranged in the groove 6G and the groove 7G is bent and maintained by the first recess 6 and the second recess 7. That is, when observed from the direction in which the lead 4 is extended and which is orthogonal to the depth direction of the grooves 6G and 7G, the lead 4 is maintained in a state bent into a U-shape. Thus, even when a pulling force is applied to the lead 4 from the outside, the breakage of the lead 4 (for example, the falling off or breaking of the end 4a) can be suppressed. It should be noted that the "reverse" mentioned here means that the depth direction of the groove 6G toward the bottom surface 6Gb is 180 degrees different from the depth direction of the groove 7G toward the bottom surface 7Gb (flipped).

[0036] exist Figure 1 as well as Figure 2 In the embodiment, two first recesses 6 are provided on the first component 1 side, and a second recess 7 is provided on the second component 2 side. Therefore, when the first component 1 and the second component 2 are assembled, with the lead 4 arranged in the grooves 6G of the two first recesses 6, the lead 4 is located in the groove 7G of the second recess 7 and is pressed by the bottom surface 7Gb of the groove 7G. In other words, the lead 4 is sandwiched between the grooves 6G and 7G of the two recesses 6 and 7 from two directions offset by 180 degrees, as shown in FIG. Figure 1 As shown, it is kept bent in a U shape.

[0037] It should be noted that the second recess 7 may be provided on the first component 1 side, and two first recesses 6 may be provided on the second component 2 side. In this case, as described above, the lead 4 is clamped by the grooves 6G and 7G of the two recesses 6 and 7 from two directions offset by 180 degrees, and is thus maintained in a U-shaped bend. In addition, the first recess 6 may not be directly formed in the first component 1 or the second component 2. For example, the first recess 6 may be pre-set in a component other than the above-mentioned components 1 and 2 (not shown in the figure), and the component is assembled to the first component 1 or the second component 2. The same applies to the second recess 7. That is, the second recess 7 may not be directly formed in the first component 1 or the second component 2. For example, the second recess 7 may be pre-set in a component other than the above-mentioned components 1 and 2 (not shown in the figure), and the component is assembled to the first component 1 or the second component 2 (the component not provided with the first recess 6).

[0038] In the holding portion structure, in the assembled state, it is preferable to use the corners 6E and 7E of the recesses 6 and 7 to hold the lead 4. Specifically, it is preferable to use the first recess 6 (for example, Figure 1 The first concave portion 6 on the left) and the second concave portion 7 are opposite to each other at two corners 6E and 7E and the first concave portion 6 on the other side ( Figure 1Lead 4 is held in the first recess 6G and the second recess 7 on the right side of the groove 6G. Opposing corners 6E and 7E of the grooves 6G and 7G are used to hold lead 4. It should be noted that "corner" refers to the edge of each groove 6G and 7G that is open in the direction of its extension. Furthermore, it is more preferable that each corner 6E and 7E sink into lead 4. Lead 4 is more securely held in these corners 6E and 7E. Corners 6E and 7E may also have a so-called C-chamfered shape.

[0039] In the retaining portion structure, one of the first recess 6 and the second recess 7 is provided on the first component 1 side, and the other of the first recess 6 and the second recess 7 is provided on the second component 2 side. However, it is preferred that the groove width of the recess 6 or 7 provided on the side of the component where the lead 4 is provided (here, the first component 1) is narrower than that of the recess 7 or 6 provided on the side of the component where the lead 4 is not provided (here, the second component 2). The "groove width" mentioned here refers to the separation distance between the two side surfaces forming the groove. Figure 1 as well as Figure 2 In the embodiment, the first recess 6 is provided on the first component 1 side where the lead 4 is arranged, and the second recess 7 is provided on the second component 2 side. Therefore, the groove width of the first recess 6 is preferably narrower than the groove width of the second recess 7. It should be noted that in the case of the reverse structure, the size relationship of the groove width is also preferably reversed.

[0040] When connecting the lead 4 to the connection object 5 disposed on the first component 1, the second component 2 is assembled with the first component 1 while the lead 4 is positioned within the groove of the recessed portion (e.g., first recessed portion 6) on the first component 1 side. Therefore, for example, if the groove width of the first recessed portion 6 is narrower than the groove width of the recessed portion (in this case, second recessed portion 7) on the second component 2 side, the lead 4 can more easily enter the groove 7G of the second recessed portion 7 when bending the lead 4, thereby improving assembly efficiency. Furthermore, if the groove width of the recessed portion (e.g., first recessed portion 6) on the first component 1 side is equal to or slightly larger than the outer diameter of the lead 4, this recessed portion can be used to position the lead 4, further improving assembly efficiency.

[0041] In addition, if Figure 2 As shown, in the retaining portion structure, it is preferred that at least one of the first recess 6 and the second recess 7 has a protrusion 6P, 7P protruding from the inner surface of the groove 6G, 7G. The protrusion 6P, 7P has the function of more firmly retaining the lead 4 by sinking into the lead 4 arranged in the groove 6G, 7G (the same function as the corners 6E, 7E). Figure 2In the example shown, the protrusion 6P is provided on the first recess 6 closer to the connection object 5, and the protrusion 7P is also provided on the second recess 7. In other words, the protrusion 6P is not provided on the first recess 6 farther from the connection object 5 (located further outward). Therefore, when the first component 1 and the second component 2 are assembled (when the lead 4 is bent), the lead 4 in the first recess 6 without the protrusion 6P can slide within the groove 6G, thereby preventing the bending deformation of the lead 4.

[0042] The protrusion 6P is preferably provided on a portion of the inner surface of the groove 6G in the extending direction (in the Figure 2 The center portion of the projection 6P is preferably located on one or both of the two opposing side surfaces 6Gs of the inner surface (in other words, not on the bottom surface 6Gb). This prevents the lead 4 from being pushed up from the bottom surface 6Gb when the first and second components 1 and 2 are assembled (when the lead 4 is bent), thereby preventing the second component 2 from floating relative to the first component 1, ensuring good assembly. Furthermore, the projection 6P preferably has a shape that tapers from the base end (the end in contact with the inner surface) toward the tip. This allows the tip to easily sink into the lead 4, improving retention.

[0043] The same is true for the protrusion 7P. That is, the protrusion 7P is preferably provided in a portion of the inner surface of the groove 7G in the extending direction (in the Figure 2 The protrusion 7P preferably has a central portion in the extending direction and is preferably provided on one or both of the two opposing side surfaces 7Gs of the inner surface (not provided on the bottom surface 7Gb). Furthermore, the protrusion 7P preferably has a shape that tapers from the base end (the end in contact with the inner surface) toward the tip. It should be noted that the protrusion 6P may be provided on both first recesses 6, or only on one of the first recess 6 and the second recess 7.

[0044] [2. Motor]

[0045] Next, a motor 10 to which the holding portion structure is applied will be described as an embodiment of the holding portion structure described above. Figure 3 (a) is a top view of the motor 10, Figure 3 (b) is an axial cross-sectional view of the motor 10 through the retaining structure. Figure 3 AA sectional view of (a). Figure 3As shown in (b), the motor 10 is an inner rotor type brushless motor, comprising a rotor 20 that rotates integrally with a shaft 21 and a stator 30 located radially outside (hereinafter simply referred to as "outside") of the rotor 20, which are housed within a housing 11. The motor 10 of this embodiment has an impeller (not shown) fixed to the shaft 21, and functions as a drive source for a blower.

[0046] The rotor 20 includes a magnet 22 fixed to a shaft 21 and two balancers 23 that sandwich the magnet 22 axially. The rotor 20 is fixed by bearings 24 so as to be rotatable relative to the housing 11 and the end shield 12. The stator 30 includes a stator core 31 fixed to the inner circumference of the housing 11 and a coil 35 wound around the stator core 31 via an insulator 32. Lead wires 14 are connected to the ends of the coils 35.

[0047] The housing 11 includes a bottomed cylindrical portion 11A that defines a space for the rotor 20 and stator 3, and an annular portion 11B that defines a space for the impeller between the housing 11A and a cover member (not shown). The annular portion 11B extends continuously outward from the outer circumference of the sidewall 11c of the bottomed cylindrical portion 11A. The upper end of the annular portion 11B functions as a flange 11f that extends outward from the sidewall 11c.

[0048] The bottom 11d of the bottomed cylindrical portion 11A is provided with a through-hole for inserting the shaft 21 and a stepped portion 11e for securing the bearing 24 and O-ring 25. The opening of the bottomed cylindrical portion 11A (an opening formed at the upper edge of the side wall portion 11c) is covered by an end cap 12. The end cap 12 is a cover member assembled with the housing 11. In this embodiment, the outer peripheral end 12a of the end cap 12 is placed on the flange portion 11f of the housing 11, and the end cap 12 is fixed to the housing 11.

[0049] That is, in this embodiment, the housing 11 corresponds to the first component 1 described above, the end cap 12 combined with the opening of the housing 11 corresponds to the second component 2, and the lead wire 14 is held between the housing 11 and the end cap 12 and is led outward from the interior of the housing 11 and the end cap 12. In addition, the coil 35 to which the end of the lead wire 14 is connected corresponds to the connection object 5 described above, and the surfaces facing each other in the flange portion 11f and the outer peripheral end portion 12a correspond to the docking surface 3 described above. Figure 3 As shown in (a), the retaining structure of this embodiment is provided on a circumferential portion of the opposing surface (the portion where the leads 14 are drawn out). It should be noted that in this embodiment, five leads 14 are arranged in parallel, and therefore five retaining structures are arranged in parallel. All five retaining structures are identically constructed, so in the following description, unless otherwise specified, a single retaining structure will be referenced.

[0050] Next, use Figure 4(a) and (b) Figure 5 (a) and (b) Figure 6 The structure of the holding portion of this embodiment will be described. Figure 4 (a) and (b) are a plan view and a cross-sectional view showing the main part of the housing 11. Figure 4 (a) BB-view cross-sectional view, Figure 5 (a) and (b) are a plan view and a cross-sectional view showing the main part of the end shield 12. Figure 5 (a) CC cross-sectional view]. Figure 6 1 is a cross-sectional view showing a state where the lead wire 14 is held by the holding portion structure. Figure 4 Only one lead 14 is shown in (a).

[0051] like Figure 4 As shown in (b), the end surface (upper surface in the figure) of the flange portion 11f of the housing 11 on the side of the end shield 12 is not flat, but rather has axially convex and concave shapes. For convenience, the surface on the side of the end shield 12 (the surface facing the end shield 12) will be referred to as the "upper end surface" below. Specifically, when the axial position of the upper end surface of the sidewall portion 11c is set to the reference position X, two annular protrusions 11h protruding toward the end shield 12 relative to the reference position X and two annular recesses 11g recessed away from the end shield 12 relative to the reference position X are provided. Each annular protrusion 11h and each annular recess 11g form a concentric annular shape centered about the axis of the shaft 21 when viewed axially. From the radially inner side (hereinafter simply referred to as the "inner side"), the annular recess 11g, annular protrusion 11h, annular recess 11g, and annular protrusion 11h are arranged alternately in this order.

[0052] In this embodiment, the first recesses 16 corresponding to the first recesses 6 are formed in the two annular protrusions 11h. That is, the two first recesses 16 are integrally provided in the housing 11. Figure 4 As shown in (a), one first recess 16 is formed by cutting away the upper end surface of the inner annular protrusion 11h, and the other first recess 16 is formed by cutting away the upper end surface of the outer annular protrusion 11h. Each first recess 16 has a groove 16G extending in the direction in which the lead 14 extends.

[0053] It should be noted that, in this embodiment, Figure 4As shown in (b), the outer annular protrusion 11h protrudes more from the reference position X than the inner annular protrusion 11h, but the bottom surface positions (axial positions of the bottom surfaces) of the grooves 16G of the two first recesses 16 are approximately the same. In other words, the depth of the groove 16G of the outer first recess 16 is formed deeper. It should be noted that the groove widths of the two first recesses 16 are approximately the same. In addition, as shown in FIG. Figure 4 As shown in (a), the outer first recess 16 is provided with a protrusion 16P corresponding to the above-mentioned protrusion 6P.

[0054] like Figure 5 As shown in (b), for the outer peripheral end portion 12a of the end cover 12, the end surface on the housing 11 side (the lower surface in the figure) is not a flat surface, but a surface that is convex and concave in the axial direction. Hereinafter, for convenience, the surface on the housing 11 side (the surface facing the housing 11) is referred to as the "lower end surface". The lower end surface of the outer peripheral end portion 12a has a concave and convex shape that matches the shape of the upper end surface of the flange portion 11f. Specifically, there are provided a supporting surface 12b of the annular convex portion 11h that is supported (contacted) on the outside of the flange portion 11f, an annular convex portion 12c that enters the outer annular concave portion 11g, and an opposing surface 12d that is opposite to the inner annular convex portion 11h.

[0055] An annular protrusion 12c is provided protruding from the housing 11 side relative to the mounting surface 12b. The radial dimensions of the annular protrusion 12c are set such that, when the mounting surface 12b is mounted on the annular protrusion 11h (i.e., in the aforementioned combined state), the annular protrusion 12c does not contact the annular recess 11g, and a gap equal to or slightly smaller than the outer diameter of the lead 14 is formed between the annular protrusions 11h and the two annular protrusions 11h. The amount of protrusion of the annular protrusion 12c from the mounting surface 12b is set such that, in the combined state, the annular protrusion 12c does not contact the annular recess 11g. The mounting surface 12b, the annular protrusion 12c, and the facing surface 12d all form concentric annular shapes centered about the axis of the shaft 21 when viewed from the axial direction, and are arranged in this order from the outside.

[0056] In this embodiment, a second recess 17 corresponding to the second recess 7 is formed in the annular convex portion 12c. That is, the second recess 17 is integrally provided in the end cover 12. In this embodiment, as shown in FIG. Figure 5 As shown in (a), second recess 17 is formed by cutting away the upper end surface of annular projection 12c. Second recess 17 includes groove 17G extending in the direction in which lead 14 extends. The depth of groove 17G is determined based on the outer diameter of lead 14, the size of annular projection 12c relative to annular recess 11g, the depth of groove 16G in first recess 16, and other factors. Furthermore, the width of groove 17G is set slightly smaller than the width of groove 16G.

[0057] like Figure 6 As shown, in the assembled state of the end cap 12 and the housing 11, the lead wire 14 disposed in the groove 16G of the first recess 16 and the groove 17G of the second recess 17 is bent and retained by the first recess 16 and the second recess 17. Furthermore, the lead wire 14 is retained by two opposing corners 16E and 17E of the first recess 16 and the second recess 17 on one side and two opposing corners 16E and 17E of the first recess 16 and the second recess 17 on the other side.

[0058] [3. Effect]

[0059] (1) In the above-mentioned holding portion structure, if Figure 1 As shown, the lead 4 is held between the first component 1 and the second component 2 and is led outward from the interiors of the first and second components 1 and 2. Since the lead 4 is bent and held by the two first recesses 6 and the one second recess 7, even when a pulling force is applied in the longitudinal direction (the direction in which it extends) of the lead 4, breakage of the lead 4 is suppressed. For example, when the lead 4 is connected to the connection object 5 disposed inside the first and second components 1 and 2, the pulling force is less likely to act on the connection portion, thereby suppressing breakage of the lead 4.

[0060] (2) In the above-described holding portion structure, when the first component 1 and the second component 2 are assembled, the lead 4 can be held by two opposing corners 6E and 7E of the first recess 6 and the second recess 7 on one side, and by two opposing corners 6E and 7E of the first recess 6 and the second recess 7 on the other side. In this case, the lead 4 can be firmly held by the four corners 6E and 7E. Thus, even if a pulling force is applied to the lead 4 in the longitudinal direction, breakage of the lead 4 can be suppressed.

[0061] (3) In the above-mentioned retaining portion structure, the groove width of the recess (first recess 6 or second recess 7) provided on the side of the component (first component 1) where the lead 4 is provided may be narrower than the groove width of the recess (second recess 7 or first recess 6) provided on the side of the component (second component 2) where the lead 4 is not provided. In this case, when the lead 4 provided in the recess on the side of the second component 2 is bent, the lead 4 easily enters the groove of the recess on the side of the second component 2, thereby improving assembly efficiency. In particular, when the dimensional tolerance of the groove width of the recess provided on the side of the first component 1 and the dimensional tolerance of the wire diameter of the lead 4 overlap, and the groove width of the recess provided on the side of the second component 2 is set wider than the range within which the lead 4 can finally be provided in the first component 1, the dimensional tolerance of each component can be absorbed simply by assembling the second component 2 to the first component 1, thereby facilitating assembly.

[0062] (4) In the above-described retaining portion structure, at least one of the first recess 6 and the second recess 7 may include a protrusion 6P or 7P protruding from the inner surface of the groove 6G or 7G. In this case, the protrusions 6P or 7P can securely retain the lead 4. Thus, even if a pulling force is applied in the longitudinal direction of the lead 4, the pulling force is prevented from acting on the connection portion between the lead 4 and the connection object 5, thereby preventing wire breakage. Alternatively, the protrusion 6P or 7P may be provided in only one of the first recess 6 or the second recess 7. In this case, compared to a case where the protrusion 6P or 7P is provided in both the first recess 6 and the second recess 7, the protrusion 6P or 7P is less likely to sink into the lead 4 during assembly, thereby suppressing the repulsive force on the lead 4 caused by the sinking, thereby facilitating assembly of the components into the desired positions.

[0063] (5) The protrusions 6P and 7P may be provided on one or both of the two opposing side surfaces 6Gs and 7Gs of the inner surface of the grooves 6G and 7G. In this case, the lead 4 will not be lifted by the protrusions 6P and 7P and can be firmly held.

[0064] (6) The projections 6P and 7P may be tapered from the base to the tip. In this case, the tips of the projections 6P and 7P can easily sink into the lead 4, thereby holding the lead 4 more firmly.

[0065] (7) The aforementioned retaining structure is applied to the aforementioned motor 10. Specifically, the aforementioned retaining structure is applied when the coil 35, which is the object to be connected to the lead wire 14, is arranged in the housing 11, which is the first component 1, and the end shield 12, which is the second component 2, is combined with the housing 11 to retain the lead wire 14 between the housing 11 and the end shield 12. This achieves the effects of (1) to (6) above, thereby ensuring resistance to the lead wire 14 extending outward from the interior of the housing 11 and the end shield 12 to fall out, and suppressing wire breakage within the motor 10.

[0066] (8) Furthermore, in the motor 10 described above, the first recess 16 is integrally formed in the housing 11, and the second recess 17 is integrally formed in the end shield 12. This improves assemblability without increasing the number of components. It should be noted that it is also possible to adopt only one of the configurations in which the first recess 16 is integrally formed in the housing or the configuration in which the second recess 17 is integrally formed in the end shield.

[0067] [4. Others]

[0068] The above-mentioned motor 10 is only an example and is not limited to the above-mentioned structure. For example, the first recess 16 and the second recess 17 may be provided in separate components relative to both the housing 11 and the end shield 12. In this case, it is possible to provide portions (such as recesses or openings) for mounting the separate components in advance on the housing 11 and the end shield 12, respectively, so that the same effects as those of the above-mentioned motor 10 can be obtained by separately assembling the separate components. Although the shapes of the first recess 16 and the second recess 17 need to be set according to the thickness of the lead 14, if this structure is adopted, it is only necessary to assemble the separate components on the housing 11 and the end shield 12. Therefore, the housing 11 and the end shield 12, which are the main components of the motor 10, can be shared regardless of the thickness of the lead 14.

[0069] It should be noted that one of the first recess 16 and the second recess 17 may be integrally provided in the housing, while the other may be provided separately from the end shield. Alternatively, one of the first recess 16 and the second recess 17 may be provided separately from the housing, while the other may be integrally provided in the end shield.

[0070] In the motor 10 described above, the first recess 16 is provided on the housing 11 side, and the second recess 17 is provided on the end shield 12 side. However, this may be reversed. For example, even when the first recess 16 is integrally provided in the end shield 12 and the second recess 17 is integrally provided in the housing 11, the same effect as described in (8) above can be obtained.

[0071] In the above-mentioned motor 10, the second recess 17 is not provided with a protrusion, but may be provided with a protrusion. Figure 2 The protrusion 7P shown in FIG. Figure 1 as well as Figure 2 All of the holding portion structures described above can be applied to motors.

[0072] It should be noted that in the above-described motor 10, the lead wire 14 is connected to the coil 35. However, the connection object is not limited to this and may also be a substrate, for example. Furthermore, the motor type is not limited to inner rotor brushless motors and may also be applied to outer rotor motors. In the case of using lead wires, the motor may also be applied to brushed motors.

[0073] The application of the holding portion structure described above is not limited to motors, but can also be applied to electronic devices other than motors.

[0074] Description of Reference Numerals

[0075] 1: First component, 2: Second component, 4: Lead, 6: First recess, 6E: Corner, 6G: Groove, 6Gs: Side, 6P: Protrusion, 7: Second recess, 7E: Corner, 7G: Groove, 7Gs: Side, 7P: Protrusion, 10: Motor, 11: Housing (first component), 12: End shield (second component), 14: Lead, 16: First recess, 16E: Corner, 16G: Groove, 16P: Protrusion, 17: Second recess, 17E: Corner, 17G: Groove, 35: Coil (connection object).

Claims

1. A lead holding structure that holds a lead between a first component and a second component assembled with the first component and leads the lead outward from inside the first component and the second component, characterized in that: The lead holding portion structure comprises: two first recesses, which are arranged in parallel and separated from each other along the extending direction of the lead and have a groove extending in the extending direction; as well as The second recessed portion is located between the two first recessed portions when the first component and the second component are combined, and has a groove that is opposite to the groove of the first recessed portion and extends in the extending direction. One of the first recess and the second recess is provided on the first component side, and the other is provided on the second component side. In the combined state, the lead wires arranged in the grooves of the first recess and the second recess are bent and held by the first recess and the second recess. The recessed portion provided on the side of the first member and the second member where the lead is arranged has a narrower groove width than the recessed portion provided on the side of the member where the lead is not arranged.

2. The lead holding portion structure according to claim 1, wherein: The lead holding portion structure comprises: a first corner portion formed at one of the two first recessed portions; a second corner portion formed at a position in the second recessed portion opposite to the first corner portion; a third corner portion formed at the other of the two first recessed portions; as well as a fourth corner portion formed at a position in the second recessed portion opposite to the third corner portion, In the combined state, the lead is held between the first corner and the second corner, and / or the lead is held between the third corner and the fourth corner.

3. A lead holding structure that holds a lead between a first component and a second component combined with the first component and leads the lead outward from inside the first component and the second component, characterized in that: The lead holding portion structure comprises: two first recesses, which are arranged in parallel and separated from each other along the extending direction of the lead and have a groove extending in the extending direction; as well as The second recessed portion is located between the two first recessed portions when the first component and the second component are combined, and has a groove that is opposite to the groove of the first recessed portion and extends in the extending direction. In the combined state, the lead wires arranged in the grooves of the first recess and the second recess are bent and held by the first recess and the second recess. The first recess has a protrusion protruding from an inner surface of the groove of the first recess, and / or the second recess has a protrusion protruding from an inner surface of the groove of the second recess.

4. The lead wire holding portion structure according to claim 3, wherein: The lead holding portion structure comprises: a first corner portion formed at one of the two first recessed portions; a second corner portion formed at a position in the second recessed portion opposite to the first corner portion; a third corner portion formed at the other of the two first recessed portions; as well as a fourth corner portion formed at a position in the second recessed portion opposite to the third corner portion, In the combined state, the lead is held between the first corner and the second corner, and / or the lead is held between the third corner and the fourth corner.

5. The lead wire holding portion structure according to claim 3, wherein: The protrusion is provided on one or both of two mutually opposing side surfaces of the inner surface of the groove in which the protrusion is provided.

6. The lead holding portion structure according to claim 3, wherein: The protrusion is shaped so as to become thinner from the base end toward the front end.

7. A motor to which the lead wire holding portion structure according to any one of claims 1 to 6 is applied, characterized in that: The first component is a housing of a connection target object on which the lead wire is disposed. The second component is an end cap combined with the opening of the housing.

8. The motor according to claim 7, characterized in that The first recess and / or the second recess are integrally provided on the housing and / or the end shield.

9. The motor according to claim 7, characterized in that The first recess and / or the second recess is provided on a component other than the housing and the end shield. The other components are respectively assembled to the housing and the end shield.

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