阅读说明：本技术 端子台 (Terminal block ) 是由 工藤康弘 村井完 于 2018-06-15 设计创作，主要内容包括：一种端子台(1),具备：台座部(10),其呈板状,以开口的方式设置有套环安装孔(12)；和套环(20),其安装于套环安装孔(12),呈筒状,套环(20)的内表面呈内径从套环安装孔(12)的一方开口部(13)朝向套环安装孔(12)的另一方开口部(13)减小的锥形。(A terminal block (1) is provided with: a base part (10) which is plate-shaped and is provided with a collar mounting hole (12) in an opening manner; and a collar (20) that is attached to the collar attachment hole (12) and has a cylindrical shape, wherein the inner surface of the collar (20) has a tapered shape whose inner diameter decreases from one opening (13) of the collar attachment hole (12) toward the other opening (13) of the collar attachment hole (12).)

1. A terminal block is provided with:

a plate-shaped pedestal part provided with a collar mounting hole in an open manner; and

a collar mounted in the collar mounting hole and having a cylindrical shape,

the inner surface of the collar is tapered such that the inner diameter decreases from one opening of the collar mounting hole to the other opening of the collar mounting hole.

2. The terminal block of claim 1,

the inner surface of the collar is tapered such that the inner diameter decreases from the other opening toward the one opening.

3. The terminal block according to claim 1 or claim 2,

the collar has an embedding portion embedded in the pedestal portion,

the outer surface of the embedded portion is tapered such that the outer diameter increases from the one opening toward the other opening, and the outer diameter increases from the other opening toward the one opening.

4. The terminal block according to any one of claims 1 to 3,

the collar has one protruding portion protruding from the one opening portion in the axial direction of the collar, and another protruding portion protruding from the other opening portion in the axial direction of the collar,

the one protruding portion is tapered such that the outer diameter increases toward the opening edge of the one opening portion,

the other protruding portion is tapered such that the outer diameter increases toward the opening edge of the other opening portion.

Technical Field

The technology disclosed by the present specification relates to a terminal block.

Background

As an example of a conventional terminal block, a terminal block for a rotating electric machine described in japanese patent application laid-open No. 2011-160619 (patent document 1) is known. The terminal block for a rotating electric machine includes a plate-shaped base portion and a signal connector provided on the base portion. Four collars are embedded in four corners of the base by insert molding.

When four collars are embedded in the base portion by insert molding, generally, convex portions are provided in advance at four corners of a mold of the base portion. Then, the collars are inserted into the convex portions at the four corners of the mold in advance, and the resin is poured into the mold. Thereby, the four collars are buried in the pedestal portion.

Disclosure of Invention

Problems to be solved by the invention

Generally, when resin molding is performed, the amount of resin varies from portion to portion, and thus the plate-shaped base portion warps in either the upward or downward direction. In order to eliminate the warpage, the pedestal portion needs to be molded in advance in a state of warpage in a direction opposite to the warpage direction.

However, in order to mold the pedestal portion in a warped state, the pedestal portion of the mold needs to be inclined, but when the pedestal portion of the mold is inclined, the protrusions at the four corners of the mold also need to be inclined. Therefore, there are the following problems: when the resin is poured into a mold and is to be released after molding, the protrusion is caught by the collar and is difficult to release.

Means for solving the problems

The terminal block disclosed in the present specification includes: a plate-shaped pedestal part provided with a collar mounting hole in an open manner; and a collar that is attached to the collar attachment hole and has a cylindrical shape, wherein an inner surface of the collar has a tapered shape whose inner diameter decreases from one opening portion toward the other opening portion.

When the plate-shaped pedestal portion is formed by resin molding, the resin in the pedestal portion may be unevenly distributed, and the pedestal portion may be warped in either an upward direction or a downward direction. In order to eliminate such warpage, it is necessary to perform resin molding in advance with the pedestal portion facing in the direction opposite to the warpage direction. Therefore, the base portion can be warped in the opposite direction by inclining the mold of the base portion, but the protrusion portion of the insert collar of the mold also needs to be inclined at once. Therefore, if the tapered portion is not provided on the inner surface of the collar as in the conventional art, the protrusion of the mold is caught by the inner surface of the collar, and the collar cannot be pulled out from the protrusion of the mold. However, when the inner surface of the collar has the tapered portion as in the above configuration, the protrusion of the mold does not catch on the inner surface of the collar, and the collar can be pulled out from the protrusion.

Further, an inner surface of the collar may have a tapered shape whose inner diameter decreases from the other opening toward the one opening.

With this configuration, when the collar is fitted to the protrusion of the mold, the collar can be fitted regardless of the orientation of the collar, and workability in fitting the collar can be improved.

Further, the collar may have an embedded portion embedded in the pedestal portion, and an outer surface of the embedded portion may be tapered such that an outer diameter thereof increases from the one opening portion toward the other opening portion, and the outer surface may be tapered such that an outer diameter thereof increases from the other opening portion toward the one opening portion.

For example, even if stress is applied to the collar, the tapered portion provided on the outer surface of the embedded portion of the collar is hooked on the inner surface of the collar attachment hole, and the collar is held without being detached. By providing the tapered portion on the outer surface of the collar in this way, the retaining force of the collar can be improved.

In addition, the collar may have one protruding portion protruding from the one opening portion in the axial direction of the collar, and another protruding portion protruding from the other opening portion in the axial direction of the collar, the one protruding portion having a tapered shape in which an outer diameter increases toward an opening edge of the one opening portion, and the other protruding portion having a tapered shape in which an outer diameter increases toward an opening edge of the other opening portion.

In order to prevent the head portion of the screw from damaging the resin portion of the base portion when the screw is inserted into the collar and the terminal block is fixed, an end portion of the collar may protrude from an opening portion of the collar mounting hole. If the tapered portion is not provided in the projecting portion of the collar as in the conventional art, the collar is caught by the projecting portion of the mold, and the collar cannot be pulled out from the mold. However, by providing the tapered portion having an outer diameter increasing toward the opening edge of the opening portion in the projecting portion of the collar as in the above-described configuration, the collar can be pulled out from the protruding portion.

Effects of the invention

According to the terminal block disclosed in the present specification, even if the base portion to which the collar is attached is resin-molded in a state in which the base portion is warped upward or downward, the protrusion of the mold that passes through the collar can be prevented from being unable to be pulled out.

Drawings

Fig. 1 is a perspective view of a terminal block.

Fig. 2 is a plan view of the terminal block.

Fig. 3 is a sectional view a-a of the pedestal portion of fig. 3 in a state where the pedestal portion is not warped.

Fig. 4 is a sectional view a-a of the pedestal portion of fig. 3 in a state of being warped downward.

Fig. 5 is a sectional view a-a of the pedestal portion of fig. 3 in a state of being warped upward.

Fig. 6 is a cross-sectional view taken along line a-a of fig. 3, showing a change from a state in which the pedestal portion is warped upward to a state in which the pedestal portion is not warped.

Fig. 7 is a sectional view of the vicinity of the collar after resin is injected into the mold.

Fig. 8 is a cross-sectional view of the vicinity of the collar after resin is injected into the mold in the case of using a conventional collar.

Detailed Description

< embodiment >

The present embodiment will be described with reference to fig. 1 to 8.

As shown in fig. 1, the terminal block 1 of the present embodiment includes a base 10 and a housing 11. In the following description, the upper side of the drawing in fig. 3 is referred to as the upper side, and the right side is referred to as the right side.

As shown in fig. 1, the pedestal portion 10 has a rectangular plate shape. The housing 11 is rectangular in plan view and protrudes upward from the center of the base 10. The base 10 and the housing 11 are integrally formed by resin molding.

As shown in fig. 1, the pedestal portion 10 and the housing 11 immediately after the resin is injected into the mold 30 described later are parallel to each other, but if the resin is cured for a certain period of time due to unevenness of the resin in the terminal block 1, the resin warps in either the upward or downward direction. For example, in the present embodiment, as shown in fig. 4, base portion 10a and case 11a of terminal block 1a are formed to be warped downward. In order to eliminate this warpage, as shown in fig. 5, the base 10b and the housing 11b of the terminal block 1b are resin-molded in a shape warped upward in advance. Thus, when the resin is cured for a certain period of time, the base 10 and the housing 11 are parallel to each other as shown in fig. 6.

Collar mounting holes 12 are provided so as to be opened at four corners of the base portion 10. A metal collar 20 is attached to each collar attachment hole 12 by insert molding.

As shown in fig. 1 and 3, the collar 20 is cylindrical and includes a protruding portion 21 protruding vertically from the upper and lower openings 13 of the collar mounting hole 12, and an embedded portion 22 embedded in the collar mounting hole 12.

As shown in fig. 3, an inner surface tapered portion 23 having an inner diameter decreasing downward from an upper end portion 25 of the collar 20 is provided on the inner surface of the collar 20. Further, an inner surface tapered portion 23 having an inner diameter decreasing upward from an end portion 25 on the lower side of the collar 20 is provided on the inner surface of the collar 20. With this configuration, when the collar 20 is fitted to the projection 51 of the lower die 50 described later, the collar 20 can be fitted regardless of the orientation of the collar 20, and workability in fitting the collar 20 to the lower die 50 can be improved.

As shown in fig. 3, an outer surface tapered portion 24 having an outer diameter that increases downward from an upper end portion 25 of the collar 20 is provided on the outer surface of the collar 20. Further, an outer surface tapered portion 24 having an outer diameter that increases upward from a lower end portion 25 of the collar 20 is provided on the outer surface of the collar 20. With this configuration, for example, even if stress is applied to the collar 20, the outer surface tapered portion 24 is hooked on the inner surface of the collar mounting hole 12, and the collar 20 is held without being detached. By providing the outer surface tapered portion 24 in this way, the holding force of the collar 20 can be improved.

The inclination angle of the inner surface tapered portion 23 and the inclination angle of the outer surface tapered portion 24 are larger than the inclination angle of the pedestal portion 10b in the upwardly warped state. Thus, when resin molding of the terminal block 1 is performed, the protrusion 41 of the upper mold 40 and the protrusion 51 of the lower mold 50, which will be described later, inserted into the collar 20 can be pulled out from the collar 20.

As shown in fig. 7, the resin molding of the terminal block 1 is performed by injecting resin into the mold 30. The mold 30 is composed of an upper mold 40 and a lower mold 50.

The base surface 52 of the lower die 50 forming the base portion 10 is slightly inclined so as to warp the base portion 10 upward. The lower die 50 is provided with a protrusion 51 protruding from the platen surface 52 in the normal direction. Further, a groove-shaped recess 53 recessed from the pedestal surface 52 is provided around the base end of the protrusion 51.

The protrusion 51 of the lower die 50 has a truncated cone shape that tapers upward toward the normal direction of the platen surface 52. The recess 53 of the lower die 50 has an inner circumferential surface 54 radially opposed to the outer circumferential surface of the protrusion 51, and the inner circumferential surface 54 is tapered such that the diameter decreases toward the lower side in the normal direction of the pedestal surface 52.

The upper mold 40 and the lower mold 50 are vertically symmetrical, and the upper mold 40 is also provided with the protrusion 41, the seating surface 42, and the recess 43, as in the lower mold 50. The recess 43 of the upper die 40 has an inner circumferential surface 44 radially opposed to the outer circumferential surface of the protrusion 41, similarly to the recess 53 of the lower die 50.

Next, the operation of the present embodiment will be described.

As shown in fig. 7, when the collar 20 is inserted into the protrusion 51 of the lower die 50, the lower end 25 of the collar 20 abuts against the bottom surface of the recess 53 of the lower die 50. The lower outer tapered portion 24 of the collar 20 abuts against the inner circumferential surface 54 of the recess 53 of the lower die 50, and the lower inner tapered portion 23 abuts against the outer circumferential surface of the protrusion 51 of the lower die 50.

Next, the upper die 40 is lowered downward, and when the protrusion 41 of the upper die 40 is inserted into the collar 20, the upper end 25 of the collar 20 abuts against the top surface of the recess 43 of the upper die 40. The upper outer tapered portion 24 of the collar 20 abuts against the inner peripheral surface 44 of the recess 43 of the upper die 40, and the upper inner tapered portion 23 abuts against the outer peripheral surface of the projection 41 of the upper die 40.

Next, a resin is injected into the mold 30. After the resin is cured, the upper mold 40 is lifted. At this time, since the collar 20 is provided with the inner surface tapered portion 23 and the outer surface tapered portion 24, the projecting portion 41 of the upper die 40 can be pulled out from the collar 20 without undercut (undercut). Similarly, the protrusion 51 of the lower mold 50 can be pulled out from the collar 20. When the terminal block 1b is pulled out from the mold 30 and a predetermined time elapses, as shown in fig. 6, the base portion 10b and the housing 11b of the terminal block 1b are warped downward and become parallel to each other (the shapes of the base portion 10 and the housing 11).

On the other hand, when the resin molding is performed by attaching the collar 20a, which has no structure of the inner surface tapered portion 23 and the outer surface tapered portion 24, to the mold 30a as in the related art, the protrusion 41a and the recess 43a of the upper mold 40a are caught by the inner surface and the outer surface of the collar 20a as shown in fig. 8, and therefore the upper mold 40a cannot be pulled out from the collar 20 a. Similarly, the protrusion 51a of the lower die 50a cannot be pulled out of the collar 20 a.

As described above, according to the present embodiment, when the plate-shaped pedestal portion 10 is formed by resin molding, the resin in the pedestal portion 10 may be unevenly distributed, and the pedestal portion may be warped in either the upward direction or the downward direction. In order to eliminate such warpage, it is necessary to perform resin molding by warping the base 10 in a direction opposite to the warping direction. Therefore, the mold 30 of the pedestal portion 10 is inclined, so that the pedestal portion 10 can be warped in the opposite direction, but it is necessary to incline the protrusions 41 and 51 of the insert collar 20 of the mold 30 as well. Therefore, if the tapered portion is not provided on the inner surface of the collar 20a as in the conventional art, the protrusion portions 41a and 51a of the mold 30a are caught on the inner surface of the collar 20a, and the collar 20a cannot be pulled out from the protrusion portions 41a and 51a of the mold 30 a. However, if the inner surface of the collar 20 is tapered (inner surface tapered portion 23) as in the above-described configuration, the projections 41 and 51 of the mold 30 are not caught by the inner surface of the collar 20, and the collar 20 can be pulled out from the projections 41 and 51.

Further, when the collar 20 is fitted to the protrusion 51 of the die 30, the collar 20 can be fitted regardless of the orientation of the collar 20, and workability in fitting the collar 20 can be improved.

For example, even if stress is applied to the collar 20, the tapered portion (outer surface tapered portion 24) provided on the outer surface of the embedded portion 22 of the collar 20 is hooked on the inner surface of the collar attachment hole 12, whereby the collar 20 is held without being detached. By providing the tapered portion (outer surface tapered portion 24) on the outer surface of the collar 20 in this way, the holding force of the collar 20 can be improved.

In addition, in order to prevent the head portion of the screw from damaging the resin portion of the base 10 when the screw is inserted into the collar 20 to fix the terminal block 1, the end portion 25 of the collar 20 may protrude from the opening 13 of the collar mounting hole 12. If the tapered portion is not provided in the projecting portion 21a of the grommet 20a as in the conventional case, the grommet 20a is caught by the projecting portions 41a and 51a of the mold 30a, and the grommet 20a cannot be pulled out from the mold 30 a. However, by providing the tapered portion (outer surface tapered portion 24) whose outer diameter increases toward the opening edge 14 of the opening 13 in the projecting portion 21 of the collar 20 as in the above-described configuration, the collar 20 can be pulled out from the protruding portions 41 and 51.

< other embodiment >

The technology disclosed in the present specification is not limited to the embodiments described above and illustrated in the drawings, and includes, for example, the following various embodiments.

(1) In the above embodiment, the collar 20 has the projecting portions 21 projecting upward and downward from the upper and lower openings 13 of the collar attachment hole 12, respectively, but may be configured so as not to project.

(2) In the above embodiment, the outer surface of the embedded portion 22 of the collar 20 is tapered, but a configuration may be adopted in which no tapered portion is provided regardless of the shape of the outer surface of the embedded portion. In order to secure the holding force of the collar to the pedestal portion, a flange may be provided on the outer surface of the embedded portion to improve the holding force of the collar.

(3) The inner surface tapered portion 23 of the collar 20 has an inner diameter that decreases downward from the upper end 25 and decreases upward from the lower end 25, but may have an inner diameter that decreases only from either the upper side or the lower side toward the other side.

Description of the reference numerals

1. 1a, 1 b: terminal block

10. 10a, 10 b: seat part

12: mounting hole for lantern ring

13: opening part

14: opening edge

20. 20 a: lantern ring

21. 21 a: projection part

22: embedding part