JP2017207154A - Housing and press-fitting method of press-fitting member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve accuracy of positioning of a press-fitting member to be press-fitted.SOLUTION: This invention relates to a resin housing 1 having a storing concavity 30 into which a press-fitting member with polygonal shape as seen from a top plan view is press-fitted and stored. The storing concavity 30 has a polygonal shape of which top plan view of its opening is similar to that of the press-fitting member. A partial inner surface of inner surfaces of the concavity 30 is provided with first protrusions 41 protruded to the inner side of the storing concavity 30 while being extended in an axial direction and at least two other non-parallel inner surfaces and oppositely facing against the inner surface provided with the first protrusions 41 are provided with the second protrusions 42 protruded inside the storing concavity 30. The first protrusions 41 are set to have a smaller width than that of the second protrusions 42 and crushed when the press-fitting member is press-fitted, the second protrusions 42 have a position setting part that is abutted against the press-fitting member in a planer direction crossing at a right angle in an axial direction with an outer peripheral surface of the press-fitting member when the press-fitting member is press-fitted.SELECTED DRAWING: Figure 2

Description

  The technology disclosed in this specification relates to a housing and a press-fitting method of a press-fitting member.

  2. Description of the Related Art Conventionally, a resin-made housing having an accommodation recess in which a press-fitting member such as a nut or a collar is press-fitted is provided with a plurality of protrusions provided on the inner surface of the accommodation recess. For example, Japanese Patent Application Laid-Open No. 2010-139018 (Patent Document 1) discloses a resin product having a through hole (accommodating recess) into which a collar is press-fitted, and a plurality of peaks (projections) formed in the through hole. It is disclosed. In this resin product, as the collar is press-fitted into the through hole, the plurality of crests are crushed by the collar, and the collar is pressed and clamped between the crushed crests by the reaction force, so that the collar is Effectively fixed.

JP 2010-139018 A

  However, in the resin product disclosed in Patent Document 1, a plurality of peaks may not be uniformly crushed due to work variations when the collar is press-fitted, and may be crushed in an uneven manner. When a plurality of peaks are crushed in a biased manner in this way, the collar is displaced from the design position in the plane direction perpendicular to the axial direction (press-fit direction) of the collar in the through hole, and the positioning accuracy of the collar in the through hole is improved. May decrease.

  The technology disclosed in the present specification has been created in view of the above-described problems, and an object thereof is to increase the positioning accuracy of a press-fitted member to be press-fitted.

  The technology disclosed in this specification is a resin-made housing having a housing recess in which a press-fitting member having a polygonal shape in plan view is press-fitted in the axial direction, and the housing recess is in plan view of the opening. Is a polygonal shape similar to the planar view of the press-fitting member, and a first part that protrudes inward of the housing recess in a form extending in the axial direction on a part of the inner surface of the housing recess. A second protrusion that protrudes inward of the receiving recess on an inner surface that is provided with a protrusion and that is at least two other non-parallel inner surfaces opposite to the inner surface provided with the first protrusion. The first projecting portion is crushed when the press-fitting member is press-fitted by making the width smaller than the second projecting portion, and the second projecting portion is the press-fitting member when the press-fitting member is press-fitted. Against the outer peripheral surface of the plate and the plane direction perpendicular to the axial direction. About housing having a positioning portion for positioning the piezoelectric penetration member in the planar direction by.

  In the housing described above, when the press-fitting member is press-fitted into the housing recess, the first protrusion is crushed and the outer peripheral surface of the press-fitting member abuts the positioning part of the second protrusion in the planar direction. At this time, since the second protrusion is provided on at least two non-parallel inner surfaces of the inner surface of the housing recess, the press-fitting member is positioned in the housing recess in at least two different directions in the plane direction by the positioning portion. Is done. By further press-fitting the press-fitting member into the housing recess from the state where the press-fitting member is positioned as described above, the press-fitting member is press-fitted while the movement of the press-fitting member in the plane direction is regulated by the positioning unit. The first protrusion is further crushed by the press-fitting member.

  And since the 2nd protrusion part is provided in the inner surface facing the inner surface in which the 1st protrusion part was provided, the 2nd protrusion part and crushing by the reaction force of the said 1st protrusion part being crushed The press-fitting member is pressed and clamped between the first projecting portion and the press-fitting member is fixed in the housing recess. For this reason, irrespective of the crushing mode of the first protrusion, the press-fitting member can be press-fitted and accommodated in the accommodating recess while the press-fitting member is positioned in the plane direction. As a result, in the housing described above, the positioning accuracy of the press-fitting member to be press-fitted can be increased.

  In the housing described above, the first projecting portion is inclined toward the bottom surface side from the opening side of the housing recess to the inside of the housing recess and has an inclined surface that contacts the press-fit member when the press-fit member is press-fitted. You may have on the side.

  According to this configuration, at the time of press-fitting the press-fitting member into the housing recess, first, the first projecting portion provided on the opening side of the housing recess is inclined while the press-fitting member is positioned in the planar direction by the positioning portion of the second projecting portion. The press-fitting member comes into contact with the surface. Then, by press-fitting the press-fitting member into the housing recess, the press-fitting member tends to be guided to the bottom surface side and the inner side of the housing recess by the inclined surface, so that the first protrusion is easily crushed by the press-fitting member. In this way, it is possible to provide a specific configuration for the first protrusion to be easily crushed while the press-fitting member is positioned in the planar direction by the second protrusion.

  In the housing described above, the second projecting portion may be provided so as to extend in the axial direction from the opening side to the bottom surface side of the housing recess.

  According to this configuration, the press-fitting member continuously contacts the positioning portion from the start of press-fitting of the press-fitting member into the housing recess and is positioned in the planar direction. For this reason, the positioning accuracy of the press-fitting member can be further increased.

  In the housing described above, the second projecting portion may be provided on at least two inner side surfaces orthogonal to each other among the inner side surfaces of the housing recess.

  According to this configuration, the press-fitting member that is press-fitted into the housing recess can be positioned at least in the vertical direction and the horizontal direction in the planar direction by the positioning portion of the second protrusion. For this reason, the positioning accuracy of the press-fitting member can be further increased.

  In the housing described above, the positioning portion may have a planar shape that comes into contact with the outer peripheral surface of the press-fitting member.

  According to this configuration, the press-fitting member can be effectively positioned as compared with the case where the positioning part is in contact with the outer peripheral surface of the press-fitting member at the time of press-fitting the press-fitting member into the housing recess.

  In the housing described above, a plurality of the second protrusions may be provided for one inner surface.

  For example, when one second projecting portion having a large width is provided on one inner surface, the dimensional accuracy of the positioning portion in the manufacturing process of the second projecting portion (for example, the flatness accuracy when the positioning portion is planar) It is difficult to ensure. According to said structure, the dimensional accuracy of a positioning part can be improved by providing the several 2nd protrusion part with a small width | variety on one inner surface, for example. As a result, the positioning accuracy of the press-fitting member can be further increased.

  Another technique disclosed in the present specification is a press-fitting method of a press-fitting member that press-fits a press-fitting member having a polygonal shape in a plan view in a housing concave portion provided in a resin-made housing in the axial direction thereof. The housing recess has a polygonal shape in which the plan view of the opening is similar to the plan view of the press-fitting member, and extends in the axial direction on a part of the inner surface of the housing recess. A first projecting portion projecting inward of the housing recess is provided, and the housing recess is formed on an inner surface that is at least two other non-parallel inner surfaces facing the inner surface provided with the first projecting portion. A second projecting portion projecting inwardly of the press-fit member, and when the press-fitting member is press-fitted, an outer peripheral surface of the press-fitting member is brought into contact with the second projecting portion so that the press-fitting member is perpendicular to the axial direction. The first protrusion is inserted into the press-fitting part while positioning On Pumping method for press-fitting member to be crushed by.

  According to the above press-fitting method of the press-fitting member, since the second projecting portion is provided on at least two non-parallel inner side surfaces of the inner side surface of the receiving recess, the press-fitting member is accommodated in the receiving recess when the press-fitting member is press-fitted. Can be positioned in at least two different directions in the plane direction by the positioning portion. Then, by pressing the press-fitting member into the housing recess while crushing the first projecting portion with the press-fitting member in a state where the press-fitting member is positioned in this way, the reaction force of the crushed first projecting portion causes the first The press-fitting member is pressed and clamped between the two projecting portions and the crushed first projecting portion, and the press-fitting member is fixed in the housing recess. For this reason, irrespective of the crushing mode of the first protrusion, the press-fitting member can be press-fitted into the housing recess while the press-fitting member is positioned in the plane direction, and the positioning accuracy of the press-fitted member to be press-fitted is increased. Can do.

  According to the technique disclosed in this specification, the positioning accuracy of the press-fitting member to be press-fitted can be increased.

The perspective view of the housing which concerns on Embodiment 1. FIG. Front view of housing The front view which expanded the accommodation recessed part in FIG. Sectional view of IV-IV section in Fig. 2 Perspective view of press-fitting member Front view of housing with press-fitted member Sectional view of VII-VII cross section in FIG. The front view which expanded the accommodation recessed part of the housing which concerns on Embodiment 2. FIG. The front view which expanded the accommodation recessed part of the housing which concerns on Embodiment 3. FIG. The front view which expanded the accommodation recessed part of the housing which concerns on Embodiment 4. FIG.

(Housing configuration)
Embodiments will be described with reference to the drawings. In the present embodiment, for example, in a hybrid vehicle or an electric vehicle, a housing 1 that constitutes a part of a terminal block that electrically connects between an inverter (not shown) and a motor (not shown) is illustrated. A part of each drawing shows an X axis, a Y axis, and a Z axis that are orthogonal to each other, and each axis direction is drawn in the direction shown in each drawing. In the following, the lower right side of FIG. 1 is the front, the X axis direction is the front-rear direction of the housing 1, the upper right side of FIG. 1 is the right side, the Y axis direction is the left and right direction of the housing 1, and the upper side of FIG. The Z-axis direction will be described as the vertical direction of the housing 1.

  The housing 1 of the present embodiment is made of a synthetic resin having excellent rigidity, and as shown in FIGS. 1 and 2, the upper portion thereof is a fitting portion 12 to be fitted with another housing or the like. The lower portion is a connecting portion 14 to which a connecting member extending from the inverter side is connected. The fitting portion 12 of the housing 1 is provided so as to protrude slightly forward from the connecting portion 14.

  As shown in FIG. 2, the connecting portion 14 of the housing 1 has a substantially square shape when viewed from the front, and a nut 20 (see FIG. 5, etc., which is an example of a press-fitting member) 20 having a substantially square shape in plan view is press-fitted. It has the accommodation recessed part 30 accommodated. In addition, a groove portion 14 </ b> A that extends in the vertical direction in a shape that opens forward is provided on the lower side of the housing recess 30. The lower end of the groove 14A can be fitted with a connector or the like extending from the inverter side.

  Here, the nut 20 housed in the housing recess 30 will be described first with reference to FIG. The nut 20 has a metal block shape, and has a substantially square shape in plan view with rounded corners. A fastening hole 22 penetrating in the axial direction (front-rear direction) of the nut 20 is provided in a substantially central portion of the nut 20. In this fastening hole 22, a plurality of bus bars (not shown) are arranged on the front surface 20A of the nut 20 and a bolt (not shown) is screwed after being inserted into an insertion hole provided in each bus bar. Each bus bar is bolted to the nut 20 and the bus bars are electrically connected to each other.

  Next, the configuration of the housing recess 30 will be described in detail. As shown in FIGS. 2 and 3, the housing recess 30 has a substantially square shape in which the plan view of the opening 30 </ b> A resembles a slightly larger shape than the plan view of the nut 20 to be housed. Accordingly, four inner side surfaces 30 </ b> B are provided in the accommodation recess 30. As shown in FIGS. 3 and 4, the bolt 20 is screwed into the fastening hole 22 of the nut 20 after the nut 20 is press-fitted into the housing recess 30 substantially at the center of the bottom surface 30 </ b> C of the housing recess 30. When this is done, a concave bolt housing portion 32 is provided in which the tip of the bolt that penetrates the fastening hole 22 is housed.

  As shown in FIG. 3, of the four inner side surfaces 30 </ b> B in the accommodation recess 30, two adjacent inner side surfaces 30 </ b> B (inner side surfaces located on the upper side and the right side in FIG. 3) are respectively located inside the accommodation recess 30. A plurality of first projecting portions 41 projecting slightly toward each other are provided apart from each other. On the other hand, among the four inner side surfaces 30B, the other two adjacent inner side surfaces 30B (inner side surfaces located on the lower side and the left side in FIG. 3) are a plurality that slightly protrude toward the inside of the housing recess 30 respectively. The second protrusions 42 are provided apart from each other. These two inner side surfaces 30B provided with the second projecting portions 42 are non-parallel because they are adjacent to each other at approximately 90 degrees, and face the inner side surfaces 30B provided with the first projecting portions 41, respectively. ing.

  As shown in FIGS. 3 and 4, the first protrusions 41 provided on the two inner side surfaces 30 </ b> B of the housing recess 30 are arranged in the front-rear direction (the above-described shaft) from the opening 30 </ b> A side to the bottom surface 30 </ b> C side of the housing recess 30. Direction) and protrudes toward the inside of the housing recess 30 and has a tapered tip with a rounded tip. Further, as shown in FIG. 1, each first protrusion 41 has a portion of the receiving recess 30 that is located on the opening 30 </ b> A side from the opening 30 </ b> A side of the receiving recess 30 toward the bottom surface 30 </ b> C. An inclined surface 41A that is inclined inward is provided. The operation of the inclined surface 41A and the operation of each first protrusion 41 will be described in detail later.

  As shown in FIGS. 3 and 4, each of the second protrusions 42 provided on the other two inner side surfaces 30 </ b> B of the housing recess 30 extends in the front-rear direction (from the opening 30 </ b> A side to the bottom surface 30 </ b> C side). It extends in the above-mentioned axial direction) and has a substantially rectangular shape that is horizontally long in plan view. In each of the second projecting portions 42, a portion directed toward the inside of the housing recess 30 is a positioning portion 42A having a planar shape (see FIG. 1). Specifically, the positioning portion 42 </ b> A of each second protrusion 42 is a flat surface facing the outer peripheral surface 20 </ b> B of the nut 20 in parallel when the nut 20 is press-fitted into the housing recess 30, and the opening 30 </ b> A of the housing recess 30. It is provided from the side to the bottom surface 30C side. The operation of the positioning portion 42A and the operation of each second protrusion 42 will be described in detail later.

  As shown in FIG. 3, each first projecting portion 41 has a width, in other words, a dimension in a direction perpendicular to both the projecting direction and the extending direction, from the width of each second projecting portion 42. Also, the nut 20 is crushed by being pressed by the nut 20 when the nut 20 is press-fitted into the housing recess 30. Further, as shown in FIG. 3, the first projecting portions 41 and the second projecting portions 42 are provided so as to face each other in the housing recess 30.

(Housing action)
The above is the structure of the housing 1 which concerns on this embodiment, and the effect | action is demonstrated continuously. The nut 20 having a substantially square shape in plan view is press-fitted into the housing recess 30 of the housing 1 with its axial direction (front-rear direction) as the press-fitting direction. When the nut 20 is press-fitted and accommodated in the accommodation recess 30, first, on the opening 30 </ b> A side of the accommodation recess 30, a part of two adjacent outer peripheral surfaces 20 </ b> B of the nut 20 is respectively positioned on the positioning portions 42 </ b> A of the second protrusions 42. Abut with the surface. Thereby, the nut 20 is positioned in the up-down direction and the left-right direction by the positioning portions 42 </ b> A in the housing recess 30.

  Further, in the state where the nut 20 is positioned by the positioning portions 42A on the opening 30A side of the housing recess 30 as described above, a part of the two adjacent outer peripheral surfaces 20B of the nut 20 that does not come into contact with the positioning portions 42A. Are in contact with the inclined surfaces 41A of the first protrusions 41, respectively. Then, when the nut 20 is press-fitted backward (from the bottom surface 30C side of the housing recess 30) from this state, the nut 20 is moved by the inclined surface 41A while the movement of the nut 20 in the vertical and horizontal directions is restricted by the positioning portion 42A. 20 tends to be guided toward the bottom surface 30 </ b> C side and the inside of the housing recess 30.

  When the nut 20 is press-fitted rearward while the nut 20 is being guided by the inclined surface 41A in this way, as the nut 20 is press-fitted, the nut 20 starts from the back side (rear side) of the inclined surface 41A. A strong pressing force is applied to the first protrusion 41 and each first protrusion 41 is crushed by the nut 20. And since each 2nd protrusion part 42 is provided in the inner surface 30B opposite to the inner surface 30B in which each 1st protrusion part 41 was provided, by the reaction force of the said 1st protrusion part 41 being crushed, The nut 20 is pressed and clamped between the second projecting portion 42 and the crushed first projecting portion 41, and the nut 20 is fixed in the housing recess 30 as shown in FIGS. 6 and 7.

(Effect of this embodiment)
As described above, in the housing 1 of the present embodiment, when the nut 20 is press-fitted into the housing recess 30 provided in the housing 1, the nut 20 is moved vertically and horizontally by the positioning portions 42 </ b> A of the second protrusions 42. While being positioned, each first protrusion 41 is crushed by the nut 20, and the nut 20 is fixed in the housing recess 30. For this reason, the nut 20 can be press-fitted and accommodated in the accommodation recess 30 in a state in which the nut 20 is positioned in the up-down direction and the left-right direction regardless of the crushing mode of each first protrusion. As a result, the positioning accuracy of the press-fitted nut 20 can be increased.

  In the housing 1 of the present embodiment, the inclined surfaces 41 </ b> A are provided on the first protrusions 41 on the opening 30 </ b> A side of the housing recess 30. As a result, when the nut 20 is press-fitted into the housing recess 30, the nut 20 tends to be guided to the bottom surface 30 </ b> C side and the inside of the housing recess 30 by the inclined surface 41 </ b> A, and thus such an inclined surface 41 </ b> A is not provided. Compared to the case, the first protrusion 41 is easily crushed by the nut 20.

  Moreover, in the housing 1 of this embodiment, each 2nd protrusion part 42 is provided in the form extended in the front-back direction ranging from the opening 30A side of the accommodating recessed part 30 to the bottom face 30C side. With such a configuration, the nut 20 continuously contacts the positioning portions 42A from the start of press-fitting of the nut 20 into the housing recess 30 until the end of press-fitting, and is positioned in the vertical and horizontal directions. For this reason, the positioning accuracy of the nut 20 can be further increased.

  Further, in the housing 1 of the present embodiment, each second projecting portion 42 is provided on two inner side surfaces 30 </ b> B that are orthogonal to each other among the inner side surfaces 30 </ b> B of the housing recess 30. For this reason, the nut 20 press-fitted into the housing recess 30 can be positioned in the vertical direction and the horizontal direction by the positioning portion 42A of the second protrusion 42, and the positioning accuracy of the nut 20 can be further enhanced.

  Further, in the housing 1 of the present embodiment, the positioning portions 42 </ b> A of the respective second protrusions 42 have a planar shape that comes into contact with the outer peripheral surface 20 </ b> B of the nut 20. With such a configuration, the nut 20 can be effectively positioned as compared with the case where the positioning portion 42 </ b> A is in contact with the outer peripheral surface 20 </ b> B of the nut 20 when the nut 20 is press-fitted into the housing recess 30. it can.

  For example, when one second projecting portion 42 having a large width is provided on one inner side surface 30B of the accommodating recess 30, the dimensional accuracy of the positioning portion 42A in the manufacturing process of the second projecting portion 42, in other words, the flatness is flat. It is difficult to ensure accuracy. On the other hand, in the structure of this embodiment, since the two 2nd protrusion parts 42 with small width are provided with respect to one inner side surface 30B of the accommodation recessed part 30, the dimensional accuracy of positioning part 42A can be improved. . As a result, the positioning accuracy of the nut 20 can be further increased.

<Embodiment 2>
The second embodiment will be described with reference to FIG. The second embodiment is different from the first embodiment in the shape of the opening 130 </ b> A of the housing recess 130. Since the other configuration is the same as that of the first embodiment, the description of the configuration and operation is omitted. In FIG. 8, the part indicated by the reference numeral obtained by adding 100 to the numeral part of the reference numeral in FIG. 3 is the same as the part described in the first embodiment.

  In the housing according to the second embodiment, as illustrated in FIG. 8, the opening 130 </ b> A of the housing recess 130 has a substantially regular octagonal shape in plan view. Therefore, a substantially regular octagonal nut in a plan view is press-fitted and accommodated in the accommodating recess 130. The first protrusion 141 is provided on each of the five adjacent inner faces 130B of the inner recess 130B of the housing recess 130, and the second protrusion 142 is provided on each of the other three inner faces 130B. Is provided. The shape and arrangement of each first protrusion 141 and each second protrusion 142 are the same as those in the first embodiment.

  Even in the configuration of the present embodiment, when the nut is press-fitted into the housing recess 130, the positioning portion 142A of each second protrusion 142 causes the nut to move in the vertical direction, the horizontal direction, and the diagonal direction (upper right direction and lower left direction in FIG. 8). Direction). Then, while the nut is positioned in this manner, each first protrusion 141 is crushed by the nut as the nut is press-fitted, and the nut is fixed in the housing recess 130. As a result, the positioning accuracy of the press-fit nut can be increased.

<Embodiment 3>
The third embodiment will be described with reference to FIG. The third embodiment is different from that of the first embodiment in the shape of the second protrusion 242 provided on the inner side surface 230 </ b> B of the housing recess 230. Since the other configuration is the same as that of the first embodiment, the description of the configuration and operation is omitted. In FIG. 9, a part indicated by a reference numeral obtained by adding 200 to the numerical part of the reference numeral in FIG. 3 is the same as the part described in the first embodiment.

  In the housing according to the third embodiment, as shown in FIG. 9, the shape of the second projecting portion 242 provided on the inner side surface 230 </ b> B of the housing recess 230 is such that the arc side faces the inside of the housing recess 230 in plan view. It is almost semicircular. For this reason, the positioning portion 242A of the second projecting portion 242 contacts the outer peripheral surface of the nut on a line parallel to the front-rear direction when the nut is press-fitted into the housing recess 230. The shape, arrangement, etc. of each first protrusion 241 and the arrangement, etc. of each second protrusion 242 are the same as those in the first embodiment.

  Also in the configuration as in the present embodiment, when the nut is press-fitted into the housing recess 230, the positioning portion 242A of each second protrusion 242 that is semicircular in plan view, that is, the substantially central portion of the arc-shaped portion Thus, the nut is positioned in the vertical direction and the horizontal direction. Then, while the nut is positioned in this manner, each first protrusion 241 is crushed by the nut as the nut is press-fitted, and the nut is fixed in the housing recess 230. As a result, the positioning accuracy of the press-fit nut can be increased.

<Embodiment 4>
A fourth embodiment will be described with reference to FIG. In the fourth embodiment, the size of the second projecting portion 342 provided on the inner side surface 330 </ b> B of the housing recess 330 is different from that of the first embodiment. Since the other configuration is the same as that of the first embodiment, the description of the configuration and operation is omitted. In FIG. 10, the part indicated by the reference numeral obtained by adding 300 to the numeral part of the reference numeral in FIG. 3 is the same as the part described in the first embodiment.

  In the housing according to the fourth embodiment, as shown in FIG. 10, one second projecting portion 342 is provided for one inner side surface 330 </ b> B of the housing recess 330. Moreover, the 2nd protrusion part 242 is provided over the substantially whole region of the inner surface 330B, and the width | variety is large compared with the thing of Embodiment 1. FIG. For this reason, the area in which the positioning portion 342A of the second projecting portion 342 contacts the outer peripheral surface of the nut when the nut is press-fitted into the housing recess 330 is larger than that in the first embodiment. The shape, arrangement mode, and the like of each first protrusion 341 are the same as those in the first embodiment.

  Also in the configuration as in the present embodiment, when the nut is press-fitted into the accommodation recess 330, the positioning portion 342A of each second projecting portion 342 abuts most of the two outer peripheral surfaces of the nut, thereby the positioning portion 342A. The nut is effectively positioned in the vertical direction and the horizontal direction. Then, while the nut is positioned in this way, as the nut is press-fitted, each first protrusion 341 is crushed by the nut, and the nut is fixed in the accommodation recess 330. As a result, the positioning accuracy of the press-fit nut can be increased.

The modifications of the above embodiments are listed below.
(1) In each of the above embodiments, a metal nut is illustrated as an example of a press-fit member. However, the press-fit member is not limited to a nut, and may be a metal collar or the like, for example.

(2) In each of the above embodiments, the configuration in which the opening of each housing recess has a substantially square shape in plan view or a substantially regular octagonal shape in plan view is illustrated. However, the shape resembles a polygonal nut in plan view. The shape of the opening of each housing recess is not limited.

(3) In each of the above embodiments, the configuration in which the inclined surface is provided in each first protrusion is illustrated, but the configuration in which the inclined surface is not provided in each first protrusion may be employed.

(4) In each of the above embodiments, a plurality of first protrusions are provided for one inner surface of the housing recess, and a plurality or one second protrusion is provided for one inner surface of the housing recess. However, the number of first protrusions and second protrusions provided on one inner surface of the housing recess is not limited.

(5) In each of the above-described embodiments, the configuration in which each second protrusion provided on the inner side surface of the housing recess has a substantially rectangular shape in plan view or a substantially semicircular shape in plan view is exemplified. Need only have a positioning portion that can position the nut in the planar direction when the nut is press-fitted into the housing recess, and the shape thereof is not limited. For example, each 2nd protrusion part may become the taper shape which protrudes toward the inner side of an accommodation recessed part like each 1st protrusion part illustrated by each embodiment.

(6) In the above embodiment, the housing that constitutes a part of the terminal block that connects the inverter and the motor is exemplified, but the housing may be used for other purposes.

  Each embodiment has been described in detail above, but these are merely examples, and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.

DESCRIPTION OF SYMBOLS 1 ... Housing 20 ... Nut 30 ... Housing recessed part 30A ... Opening 30B ... Inner side surface 41 ... 1st protrusion part 41A ... Inclined surface 42 ... 2nd protrusion part 42A ... Positioning part

Claims (7)

A resin-made housing having an accommodation recess in which a press-fitting member having a polygonal shape in plan view is accommodated by being press-fitted in its axial direction,
The accommodation recess has a polygonal shape in which the plan view of the opening is similar to the plan view of the press-fitting member,
Of the inner surface of the receiving recess, a part of the inner surface is provided with a first protruding portion that protrudes inward of the receiving recess so as to extend in the axial direction, and at least two other non-parallel surfaces A second projecting portion projecting to the inside of the housing recess is provided on an inner surface opposite to the inner surface provided with the first projecting portion;
The first projecting portion is crushed when the press-fitting member is press-fitted by making the width smaller than the second projecting portion,
The housing having a positioning portion for positioning the press-fitting member in the plane direction by contacting the outer peripheral surface of the press-fitting member with a plane direction orthogonal to the axial direction when the press-fitting member is press-fitted.   The first projecting portion has an inclined surface on the opening side that inclines toward the inside of the housing recess from the opening side of the housing recess toward the bottom surface and contacts the press-fit member when the press-fit member is press-fitted. Item 2. The housing according to Item 1.   The housing according to claim 1, wherein the second projecting portion is provided so as to extend in the axial direction from the opening side to the bottom surface side of the housing recess.   4. The housing according to claim 1, wherein the second protrusion is provided on at least two inner surfaces orthogonal to each other among the inner surfaces of the housing recess.   The housing according to any one of claims 1 to 4, wherein the positioning portion has a flat shape that comes into contact with an outer peripheral surface of the press-fitting member.   The housing according to any one of claims 1 to 5, wherein a plurality of the second projecting portions are provided with respect to one inner surface. A press-fitting method of a press-fitting member for press-fitting a press-fitting member having a polygonal shape in a plan view into a housing recess provided in a resin-made housing in its axial direction,
The accommodation recess has a polygonal shape in which the plan view of the opening is similar to the plan view of the press-fitting member,
Among the inner surfaces of the receiving recess, a part of the inner surface is provided with a first protruding portion that protrudes inward of the receiving recess so as to extend in the axial direction, and at least two other non-parallel A second projecting portion projecting to the inside of the housing recess is provided on an inner surface opposite to the inner surface provided with the first projecting portion,
At the time of press-fitting of the press-fitting member, the first projecting part is inserted into the press-fitting while positioning the press-fitting member in a plane direction orthogonal to the axial direction by bringing the outer peripheral surface of the press-fitting member into contact with the second projecting part. A press-fitting method of a press-fitting member that is crushed by a member.

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