JPH08130846A - Motor - Google Patents

Abstract

PURPOSE: To reduce production cost by easily manufacturing a case body by realizing a construction capable of easily attaching and fixing by a rectangular parallelepiped case body which can attach without increasing a motor installing area for a more compact motor. CONSTITUTION: This motor comprises a rectangular parallelepiped case body 1, a base 2 inserted and fixed to an opening portion la of the case body 1, a rotating shaft 3 housed inside the case body 1, and a rotor 4 and a stator 5. The case body 1 is formed by folding and bending a metal plate to a folded box shape by press work and then by caulking. A terminal piece conductively connected to a brush is attached to the base 2, and external terminals 21, 22, 23 and 24 respectively projected out and formed to neighboring two surfaces of the rectangular parallelepiped are provided for said terminal piece.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor, and more particularly to the structure of a motor having a case body formed in a rectangular parallelepiped shape.

[0002]

2. Description of the Related Art Conventionally, motors have been miniaturized in various fields of use, and at present, motors having a diameter of about 10 mm are manufactured. Most of these small motors are attached to a portable device, and for example, there is a vibration generating motor for notifying the call of a pager. These motors use a cylindrical case body that is as close as possible to the rotor diameter in order to reduce the size.Therefore, fix it via a bracket that clamps the cylinder for installation in the equipment. There is. On the other hand, in a similar small motor, for example, actual Kaihei 56-14777.
As in No. 5, a motor in which the case body is formed into a substantially rectangular parallelepiped shape has been proposed. In this case, the case body has a rectangular cross section or a drum shape, and the magnets housed inside are arranged to face each other in the longitudinal direction of the cross section.

[0003]

However, in the conventional small-sized motor described above, it is not easy to mount and fix the small-sized motor, especially when it is housed in a small-sized portable device, and the bending angle motor itself is reduced in size. Since the brackets and connecting wires used for this purpose are arranged around the motor, the installation volume increases, which hinders downsizing of the portable device and complicates the mounting work. Also, in the case of a cylindrical motor, 5 mm from the point of the volume of the magnet accommodated.
There is a problem in that it is impossible to form a dimension less than or equal to the diameter with the current technology, and there is a limit to miniaturization. On the other hand, a substantially rectangular parallelepiped motor is easier to miniaturize and easier to mount and fix than the above cylindrical motor, but it is difficult to process the case body into a rectangular parallelepiped shape, and it is manufactured by press drawing. However, there is a problem that the processing cost is high and the manufacturing cost cannot be reduced. Therefore, the present invention solves the above-mentioned problems, and an object thereof is to realize a structure that can be easily mounted without increasing the installation area of a downsized motor and reduce the manufacturing cost. Is to realize.

[0004]

Means for Solving the Problems In order to solve the above-mentioned problems, the means of the present invention is a motor in which a rotor and a stator are arranged in opposition to each other inside a case body so that the rotor is rotated by magnetic force. In the above, the case body is formed into a substantially rectangular parallelepiped shape by bending a plate-like body into a folding box shape.

In this case, it is preferable that the case body is formed of one plate-shaped body.

Further, it is preferable that the plate-like body is provided with a gear train support portion projecting from a substantially rectangular parallelepiped shape of the case body.

Alternatively, it is preferable that the plate-like body is provided with a mounting and fixing portion that projects from the substantially rectangular parallelepiped shape of the case body.

Further, the case body may have an opening on at least one surface of the rectangular parallelepiped shape, and a base portion having external terminals attached may be inserted and fixed in the opening.

In this case, the opening is formed so as to straddle a plurality of adjacent surfaces of the rectangular parallelepiped shape, and the base portion is provided with at least two exposed surfaces corresponding to at least two of the plurality of surfaces. It is desirable to provide the external terminals on each of the exposed surfaces.

[0010]

According to the first aspect of the present invention, the plate body is bent into a folding box shape to form the case body, which facilitates the processing and preliminarily forms the end shape and the like on the edge portion of the plate body. As a result, an arbitrary shape or structure can be easily formed, so that the manufacturing cost can be reduced.

According to the second aspect, since the case body is formed of a single plate-like body, the amount of work for joining the plate-like bodies can be reduced, so that the manufacturing cost can be further reduced. In this case, it is particularly preferable to join the peripheral portions of the plate-shaped bodies by caulking.

According to the third or fourth aspect of the present invention, since the gear train supporting portion or the mounting fixing portion projecting from the rectangular parallelepiped shape is provided, the gear can be supported and the motor can be fixed without mounting other parts. It is possible to reduce the cost and the installation area.

According to the fifth aspect, the motor can be easily assembled by housing the rotor and the stator after forming the case body and finally inserting the base portion.

According to the sixth aspect, the opening of the case body is formed so as to straddle a plurality of adjacent surfaces, and the external terminals are provided on the plurality of exposed surfaces of the base portion corresponding to the plurality of surfaces. The range of choices such as the motor mounting position and the mounting posture is increased, and the motor can be mounted in various places.

[0015]

Embodiments of the present invention will now be described with reference to the drawings. This embodiment has a rectangular parallelepiped outer shape as shown in FIG. 1, and this outer shape is inserted into a case body 1 made by processing a metal plate into a folding box shape and an opening 1a formed in the case body 1. It is composed of a fixed base 2.

Inside the motor, a rotor 4 connected to the rotating shaft 3 and having an electromagnetic coil 4a and a stator 5 composed of a pair of permanent magnets are housed, and the rotating shaft 3 is provided in the case body 1 and the base 2, respectively. It is rotatably supported by a bearing. A commutator attached to the end of the rotor 4 is housed inside the base 2, and a terminal piece described later connected to a brush that contacts the commutator is attached to the base 2. This terminal piece projects from the inside of the base 2, and two sets of external terminals 21, 22 and 23, 24 are exposed to the outside.

The base 2 is made of molded synthetic resin, and is equipped with a bearing portion for accommodating the above-mentioned commutator and for receiving a rotary shaft. A recess 25 on the outer end,
26 is formed, and the engaging claws 13a, 1 projecting from the side surface portions 13, 14 of the case body 1 are formed in the recesses 25, 26.
4a is engaged by being bent.

The case body 1 is formed by bending a single metal plate 10 as shown in FIG. The metal plate 10 is composed of an end surface portion 11 having a shaft hole 11a through which the rotary shaft 3 is inserted and five side surface portions 12, 13, 14, 15, and 16. The side surfaces 13 and 14 have the engaging claws 13a and 14a.
Are formed to project. Engagement recesses 15a and engagement protrusions 16a are formed on the side surface portions 15 and 16 so that they can be joined to each other by caulking, and further cutout portions 15b and 16b are formed so that the external terminals 21 and 22 can be led out. Has been done.

The metal plate 10 can be finally formed into a complete box shape by gradually bending the boundary lines between the end faces and the side faces shown by the dotted line of the metal plate 10 by multi-step pressing. . Here, the processed case body 1 has a substantially rectangular parallelepiped shape, but the remaining one surface out of the six surfaces of the rectangular parallelepiped is completely opened to form the opening 1a.

FIG. 3 shows another example of the case body in the above embodiment. The metal plate 30 for forming the case body has the side surface portions 33, 36 at the side surface portion 33,
U-shaped cut line 35c extending from the boundary with 34,
36c is provided for each pair, and the side surface portion 3 is formed without bending only the inside of the cut line during press working.
Molded so as to project along 3, 34. In this way, as shown in FIGS. 3B and 3C, a pair of four fixing claws 37 and 38 are projected from the bottom surface of the case body composed of the side surface portions 35 and 36, respectively. Can be configured as The fixing claws 37 and 38 can easily position and fix the motor by being inserted into a slit formed in a wiring board or a chassis and then bent at their tips.

FIG. 4 shows the structure of another case body. In this structure, the shape of the notch in the opening of the case body is omitted. This case body is a metal plate 40
The extension portion 47 is formed following the tip of the end surface portion 41. As shown in FIGS. 4B and 4C, this extension portion is in a state of protruding from the rectangular parallelepiped shape of the case body after the case body is formed. The projecting extension portion 47 can be used to pivotally support a rotary shaft 49a of a gear 49 that meshes with a pulley 48 attached to the rotary shaft 3 of the motor as shown in FIG. 4C, for example. The extension portion 47 has an end surface portion 41 as shown by a dotted line in the drawing.
Alternatively, it may be bent perpendicularly to, for example, a bevel gear may be pivotally supported.

FIG. 5 shows a modification of the case body shown in FIG. In the metal plate 50 forming the case body, the extension portion 57 is continuously formed on the side surface portion 56. When the metal plate 50 is assembled, as shown in FIG. 5B, the extension 57 can be projected and extended from the rectangular parallelepiped shape, so that the gear train is pivotally supported as in the case shown in FIG. In addition to being used for supporting and fixing members, this extension can also be used as a fixing plate for a motor base or the like.

FIG. 6 shows an example in which support fixing portions projecting from a rectangular parallelepiped shape are provided at various places. The metal plate 60 forming the case body has a plurality of protrusions 61P, 62 on the periphery.
P, 65P, 66P are provided, and each part can be used as a fixing claw part. The advantage of the rectangular parallelepiped motor is that the flat surface portion formed on the surface can be used as the installation surface. In this example, three surfaces out of the five flat surface portions are used as the installation surface and which surface is used. Also in the above, it is possible to fix by using the protruding portion as a fixing nail portion. The protrusions 65a, 66 formed on the side surfaces 65, 66
Since a is formed so as to come into contact with each other after the case body is formed, it can be used as a joint portion for forming the case body.

FIG. 7 shows another example of the case body. In this example, four of the five surfaces of the case body are made of metal plates 70, and the other one is made of a metal plate 75.
It is configured by. After the boundaries of the metal plate 70 are bent by press working, the recesses 73a and 74a of the metal plate 75 are formed in the projections 75a and 75
It is crimped in the state of being fitted to b. This way,
The processing itself of the case body increases the number of steps and takes time and effort for manufacturing, but it is necessary to assemble the stator and rotor to be housed inside.
The base can be easily assembled and the assembly can be easily automated.

Next, the base 2 used in the motor of this embodiment
The terminal piece attached to will be described. The base 2 is designed to be inserted through the opening 1a as shown in FIG. 1. However, the opening 1a is formed over two adjacent rectangular parallelepiped surfaces by the notches 15b and 16b of the metal plate 10 shown in FIG. Therefore, the base 2 is in a state in which the end surface 2a and the side surface 2b are exposed to the outside. FIG. 8 shows the terminal piece 20 attached to the base 2.

The terminal piece 20 is formed of a conductive metal body, and is integrally formed into a bent terminal member 20A.
And two brushes 20B and 20C fixed to the terminal member 20A by silver brazing or the like. Terminal member 2
The external terminal 21 (or 22) set to project from the side surface of the base 2 and the external terminal 23 (or 24) set to project from the end surface of the base 2 are formed in 0A. . Here, a protrusion 23a (or 24a, not shown) for fitting and fixing in a later-described fitting groove of the base 2 is formed at the base of the external terminal 23.

As shown in FIG. 9, the base 2 has a round hole 27 formed to accommodate the rotary shaft 3 and the commutator 3a.
Is provided, and the pair of terminal fitting holes 2 is provided at the edge of the round hole 27.
7 are formed. The terminal fitting hole 27 is an inner hole portion 28 that receives the L-shaped cross section of the terminal member 20A from the inside.
a and an outer hole portion 28b formed corresponding to the external terminal 23 or 24 so as to penetrate to the end surface of the base 2 following the inner hole portion 28a. By inserting the terminal piece 20 into the terminal fitting hole 28 of the base 2 in the extension direction of the external terminal 23 or 24, the terminal piece 20 is mounted as shown in FIG. 9B. Here, the protrusion 23 of the external terminal 23 or 24
The a or 24a is fitted into the outer hole 28b, and in this state, the root portion of the external terminal 21 or 22 abuts against the opening edge of the outer hole 28b and is fixed.

In the embodiment described above, first, the case body 1 having a rectangular parallelepiped shape is formed into a box shape by bending the metal plate, so that the case body 1 can be formed extremely easily and the manufacturing cost can be reduced. In particular, the number of steps is reduced as compared with the conventionally used manufacturing method by drawing a press, and the cost required for forming a mold in each step is about half the cost, which is extremely effective in manufacturing. Further, by processing the peripheral shape of the metal plate into various shapes in advance as described in each of the above embodiments, various attachment structures and accessory structures can be easily formed.

Further, by forming the shape of the metal plate in advance so as to provide a portion projecting from the rectangular parallelepiped, it is possible to support a claw portion for fixing a motor, a gear train, etc. without providing a mounting step or a joining step of parts. The parts can be configured. In addition, since the opening 1a of the case body 1 is formed up to a portion corresponding to the end face and a part of the side face adjacent to the end face, the adjacent two
Since the base 2 is inserted here and the terminal piece is provided with two external terminals formed so as to simultaneously project from two adjacent surfaces of the base 2, a rectangular parallelepiped shape is formed. Since the external terminals can be formed so as to project from the two surfaces, the range of choices for the motor mounting posture can be widened. In this case, the exposed surface of the base may be provided on three or more adjacent surfaces, and the external terminals may be provided on each of the three or more surfaces.

[0030]

As described above, the present invention has the following effects.

According to the first aspect of the present invention, the plate body is bent into a folding box shape to form the case body, which facilitates the processing and preliminarily forms the end shape and the like on the edge portion of the plate body. As a result, an arbitrary shape or structure can be easily formed, so that the manufacturing cost can be reduced.

According to the second aspect, since the case body is formed of one plate-shaped body, the amount of work for joining the plate-shaped bodies can be reduced, so that the manufacturing cost can be further reduced. In this case, it is particularly preferable to join the peripheral portions of the plate-shaped bodies by caulking.

According to the third or fourth aspect of the present invention, since the gear train supporting portion or the mounting and fixing portion protruding from the rectangular parallelepiped shape is provided, the gear can be supported and the motor can be fixed without mounting other parts. It is possible to reduce the cost and the installation area.

According to the fifth aspect, the motor can be easily assembled by housing the rotor and the stator after forming the case body and finally inserting the base portion.

According to the sixth aspect, the opening of the case body is formed so as to straddle a plurality of adjacent surfaces, and the external terminals are provided on the plurality of exposed surfaces of the base portion corresponding to the plurality of surfaces. The range of choices such as the motor mounting position and the mounting posture is increased, and the motor can be mounted in various places.

[Brief description of drawings]

FIG. 1 is a perspective view (a) showing an embodiment of a motor according to the present invention and a sectional view (b) showing an internal structure.

FIG. 2 is a developed plan view showing a metal plate constituting the case body of the embodiment.

FIG. 3 is a developed plan view (a), a bottom view (b) and a side view (c) showing another embodiment of the case body.

FIG. 4 is a developed plan view (a), a bottom view (b) and a side view (c) showing still another embodiment of the case body.

FIG. 5 is a developed plan view (a), a bottom view (b) and a side view (c) showing still another embodiment of the case body.

FIG. 6 is a developed plan view (a), a bottom view (b) and a side view (c) showing still another embodiment of the case body.

FIG. 7 is a developed plan view (a), a bottom view (b) and a side view (c) showing a further embodiment of the case body.

FIG. 8 is a plan view (a), a front view (b) and a right side view (c) showing the shape of the terminal piece.

FIG. 9 is an inner front view (a) and a vertical sectional view (b) showing the structure of the base.

[Explanation of symbols]

 1 case body 2 base 3 rotary shaft 4 rotor 5 stator 10, 30, 40, 50, 60, 70 metal plate 20 terminal piece 21, 22, 23, 24 external terminal 47, 57 extension 61P, 62P, 65P, 66P protrusion

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] March 1, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a perspective view (a) showing an embodiment of a motor according to the present invention and a sectional view (b) showing an internal structure.

FIG. 2 is a developed plan view showing a metal plate constituting the case body of the embodiment.

FIG. 3 is a developed plan view (a), a bottom view (b) and a side view (c) showing another embodiment of the case body.

FIG. 4 is a developed plan view (a), a bottom view (b) and a side view (c) showing still another embodiment of the case body.

FIG. 5 is a developed plan view (a) and a side view (b) showing still another embodiment of the case body.

FIG. 6 is a developed plan view (a) and a side view (b) for showing still another embodiment of the case body.

FIG. 7 is a developed plan view (a) and (b) showing still another embodiment of the case body.

FIG. 8 is a plan view (a), a front view (b) and a right side view (c) showing the shape of the terminal piece.

FIG. 9 is an inner front view (a) and a vertical sectional view (b) showing the structure of the base.

[Explanation of reference numerals] 1 case body 2 base 3 rotating shaft 4 rotor 5 stator 10, 30, 40, 50, 60, 70 metal plate 20 terminal piece 21, 22, 23, 24 external terminal 47, 57 extension 61P, 62P , 65P, 66P protrusion

Claims (6)

[Claims] 1. A motor in which a rotor and a stator are arranged to face each other inside a case body so that the rotor is rotated by magnetic force, wherein the case body is a substantially rectangular parallelepiped formed by bending a plate-like body into a folding box shape. A motor having a shape. 2. The case body according to claim 1, wherein
A motor characterized by being formed of one of the plate-shaped bodies. 3. The motor according to claim 1, wherein the plate-shaped body includes a gear train support portion protruding from the substantially rectangular parallelepiped shape of the case body. 4. The motor according to claim 1, wherein the plate-shaped body includes a mounting and fixing portion that projects from a substantially rectangular parallelepiped shape of the case body. 5. The motor according to claim 1, wherein the case body has an opening in at least one surface of the rectangular parallelepiped shape, and a base portion having an external terminal attached is inserted and fixed in the opening. . 6. The opening according to claim 5, wherein the opening is formed across a plurality of adjacent surfaces of the rectangular parallelepiped shape, and the base portion has an exposed surface corresponding to at least two surfaces of the plurality of surfaces. A motor, wherein the external terminal is provided on each of the exposed surfaces.