JP3378748B2 - motor - Google Patents

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 a small motor used for a portable small radio caller, a portable telephone or the like.

[0002]

2. Description of the Related Art As an example of a conventional motor,
JP-A-8-149744 and JP-A-8-27542
There is No. 7 publication. The motor disclosed in this publication has a motor case that houses a motor drive mechanism such as a rotor, and a bracket is fixed to the rear end of the motor case. The bracket is fixed with two terminals electrically connected to the brush, and is also provided with two locking portions for locking the lead wires soldered to the terminals. By fixing each lead wire so as to be hooked on each locking portion, even if an unreasonable tensile force is applied to the lead wire during the motor assembling work, the lead wire is less likely to break.

[0003]

However, since the conventional motor is constructed as described above, the following problems exist. That is, since the terminals protrude from the outer end surface of the bracket and the solder portion is exposed, there is a case where a tool or the like touches during assembly work and solder peeling trouble occurs. When the motor protrudes from the bracket, it may be disadvantageous in terms of space when assembling the motor to a device (for example, a mobile phone).

The present invention has been made in order to solve the above-mentioned problems, and particularly an object thereof is to provide a motor which has a good workability in assembling it to a device and which is unlikely to cause breakage of lead wires.

[0005]

According to a first aspect of the motor of the present invention, a bracket for fixing a terminal electrically connected to a brush is provided at the rear end of the motor case. A terminal accommodating recess formed on the outer end surface of the bracket for guiding the terminal connected to the brush to the outside, and an end of a lead wire formed on the outer end surface of the bracket and extending in communication with the terminal accommodating recess and fixed to the terminal A lead wire accommodating recess for accommodating a portion and a lead wire outlet formed on the outer end surface of the bracket and provided at the end of the lead wire accommodating recess for sandwiching and fixing the lead wire are provided near the end of the lead wire accommodating recess. And bra
Opening part of the lead wire accommodating recess that forms a part of the ket
Lead wire is pulled out by the protrusion protruding to the position facing the
The mouth is formed in a substantially C shape, and is a lead wire
The part pulled out from the outlet is the shaft of the motor.
Characterized by being oriented in a direction along the axis .

In this motor, the terminals can be exposed to the outside of the motor by exposing the ends of the terminals in the terminal accommodating recesses. Also, the tip of the terminal and the soldering part
It can be accommodated in the terminal accommodating recess so as not to protrude from the outer end surface of the bracket. Moreover, the end portion of the lead wire connected to the terminal can be laid in the lead wire accommodating recess. Therefore, it is possible to clean the outer end surface of the bracket, and it becomes easy to secure a space when assembling the motor to the device. Further, by providing a lead wire outlet for sandwiching and fixing the lead wire at the end of the lead wire accommodating recess, the lead wire crawled in the lead wire accommodating recess can be pulled out from the lead wire outlet. At the same time, caulking and fixing of the lead wire is achieved at this lead wire outlet. Moreover, it is a lead wire
The part pulled out from the outlet is the shaft of the motor.
It is oriented along the axis. Therefore, even if an unreasonable pulling force is applied to the lead wire during the assembling work, this force is not received by the lead wire outlet and is not transmitted to the lead wire in the lead wire accommodating recess. The influence of the force applied to the portion can be minimized, and the handleability of the motor is improved. Further, it is preferable that the lead wire outlet is formed into a substantially C-shape by a projecting portion that forms a part of the bracket near the end of the lead wire accommodating recess and projects to a position facing the open portion of the lead wire accommodating recess. When such a configuration is adopted, the lead wire outlet having a substantially C-shape can be formed by the protruding portion, so that the lead wire crawled in the lead wire accommodating recess can be easily inserted into the lead wire outlet. Can be inserted.

[0007]

Further, a plurality of ear pieces provided at the rear end of the motor case and capable of being bent inward, and a first ear piece accommodating recess communicating with the terminal accommodating recess and extending outward of the bracket. It is preferable that the bracket is caulked and fixed to the motor case in cooperation with a second ear piece accommodating recess that extends to the outside of the bracket and communicates with the end of the lead wire accommodating recess. When such a configuration is adopted, when the bracket is assembled and fixed to the motor case, the ear pieces are bent inward and are inserted into the first and second ear piece accommodating recesses, whereby the motor case is formed. The bracket can be firmly fixed to. Furthermore, in the case of an extremely small motor having a bracket diameter of 10 mm or less, particularly 6 mm to 8 mm, the terminal accommodating recess and the lead wire outlet are extremely small, which deteriorates the workability of soldering and lead wire drawing. Therefore, by expanding the terminal accommodating recess with the first earpiece accommodating recess and expanding the terminal end of the lead wire accommodating recess with the second earpiece accommodating recess, soldering of the terminal or lead wire to the lead wire outlet is possible. The workability of inserting is improved.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the motor according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view showing a main part of a motor according to this embodiment, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. It is sectional drawing which follows the III line. As shown in these drawings, the motor 1 is a cored motor and has a metal motor case 2. The motor case 2 has a diameter of about 6 mm and a length of about 1 c.
The motor 1 has a cylindrical shape of m and is intended to be downsized.
A stator 3 made of a permanent magnet having N and S poles is fixed to an inner wall surface 2a of the motor case 2, and a rotor 4 having a coil wound around an iron core is housed inside the motor case 2. ing. A shaft 5 is fixed to the center of the rotor 4, and the shaft 5 extends so as to penetrate the front end of the motor case 2 and is axially supported by a pair of front and rear bearings 6 and 7.

An annular commutator 8 is fixed to the rear end of the shaft 5, and a brush 9 is in sliding contact with the commutator 8. A plate-shaped terminal 10 is fixed to the brush 9, and a predetermined current is supplied to the brush 9 by the terminal 10. Then, a substantially semi-cylindrical weight member 11 is press-fitted into the tip of the shaft 5, and the weight of the weight member 11 is swung by the rotational force of the shaft 5 to vibrate the motor case 2 itself. Such a configuration is adopted when the housing is vibrated by a portable small radio calling device, a mobile phone, or the like.

Here, as shown in FIGS. 1, 2 and 4, a resin bracket 1 is provided at the rear end of the motor case 2.
2 is fixed, and a terminal accommodating recess 13 having a predetermined depth is formed on the outer end surface 12a of the bracket 12. At the bottom surface position of the terminal accommodating concave portion 13, the bracket 12 has a slit-shaped opening 14 extending in the axial direction of the shaft 5. Therefore, by inserting the terminal 10 into the opening 14, the terminal 10 is opened.
4 is wedge-engaged with the wall surface to prevent the terminal 10 from coming off and being fixed to the bracket 12. At this time, although the tip of the terminal 10 is exposed in the terminal accommodating recess 13, the tip of the terminal 10 is prevented from protruding from the outer end surface 12a of the bracket 12. The tip of the lead wire 15 covered with vinyl is soldered to the tip of the terminal 10.
In consideration of this soldering, the terminal accommodating recess 13 is
It has a size such that the solder portion 16 can be accommodated inside 0.

As shown in FIGS. 1, 3 and 4, the outer end surface 12a of the bracket 12 accommodates the end portion of the lead wire 15 which extends in communication with the terminal accommodating recess 13 and is fixed to the terminal 10. A lead wire accommodating recess 17 is formed.
The lead wire accommodating recess 17 extends for a predetermined length in the circumferential direction of the bracket 12, and has a width and a depth such that the lead wire 15 can be completely buried. Therefore, the end portion of the lead wire 15 can be laid in the lead wire accommodating recess 17 in the circumferential direction, and the end portion of the lead wire 15 extending from the terminal 10 to a lead wire outlet 18 described below can be reliably accommodated. , The outer end surface 12a of the bracket 12
Can be refreshed. Further, by creating the flat outer end surface 12a, it becomes easy to secure a space when the motor 1 is assembled to a device such as a mobile phone.

Further, a lead wire outlet 18 for sandwiching and fixing the lead wire 15 is formed on the outer end surface 12a of the bracket 12, and the lead wire outlet 18 is provided at the end of the lead wire accommodating recess 17 and is substantially formed. It has a C shape. The lead wire outlet 18 having such a shape is formed by a projecting portion 19 that projects so as to close the vicinity of the end of the opening 17 a in the lead wire housing recess 17. That is, the protrusion 19 is created by radially projecting from the peripheral wall surface of the lead wire accommodating recess 17 provided in the bracket 12 so as to face the opening 17a. Further, the lead wire outlet 18 is partially cut out to have a substantially C-shape, but by making the interval of the notches A smaller than the diameter of the lead wire 15, the lead wire outlet 18 is Since the lead wire 15 does not come out and the cutout portion A is used, the lead wire 15 can be easily pushed into the lead wire outlet 18 from the outside.

When the lead wire 15 that has been crawled in the lead wire accommodating recess 17 is pulled out from the lead wire outlet 18, the lead wire outlet 18 is used as the lead wire 1.
Since the lead wire 15 is formed to have a size such that the lead wire 15 is sandwiched, the lead wire 15 can be caulked and fixed. In this case, the lead wire 15
The portion pulled out from the outlet 18 is the chassis of the motor 1.
It is oriented along the axis of the shaft 5. Therefore,
Even if an unreasonable tensile force is applied to the lead wire 15 during the assembly work, this force is received by the lead wire outlet 18 and is not transmitted to the lead wire 15 in the lead wire accommodating recess 17. As a result, an unreasonable force is not applied to the solder portion 16, the disconnection is unlikely to occur in the solder portion 16, and the handleability of the motor 1 is improved.

As shown in FIGS. 1 to 4, the bracket 12
Is provided with a flange portion 20 having substantially the same diameter as the motor case 2, and the step portion 2 created by the flange portion 20 is provided.
The bracket 12 is fitted into the motor case 2 by bringing the rear end surface 2b of the motor case 2 into contact with the motor case 0a. Further, a plurality of bendable ear pieces 21 are integrally formed at the rear end of the motor case 2. And
Corresponding to the ear piece 21, the flange portion 20 of the bracket 12 communicates with the terminal accommodating recess 13 and the bracket 12
There is provided a first ear piece accommodating recess 22 that extends outwardly of the above, and a second ear piece accommodating recess 23 that communicates with the end of the lead wire accommodating recess 17 and extends outward of the bracket 12. The second ear piece accommodating concave portion 23 is provided at a position where the protruding portion 19 faces and communicates with the lead wire outlet 18. Therefore, the lead wire 15 is connected to the protrusion 19
When it is dipped under, the lead wire 15 can be easily routed, and the lead wire 15 can be easily pulled out from the lead wire outlet 18.

Before assembling the bracket 12 and the motor case 2, each ear piece 21 projects so as to extend straight in the axial direction of the shaft 5. Therefore, each ear piece 21 and the first and second ear piece housing recesses 22,
After aligning 23 and 23 with each other, the ear piece 21 is bent inward, so that the flange portion 20 is pressed against the rear end surface 2b of the motor case 2, and the bracket 12 is fixed to the motor case 2 by caulking. By adopting such a configuration, the bracket 12 can be easily assembled to the motor case 2, and the bracket 12 can be firmly fixed to the motor case 2.

Further, in the case of an extremely small motor 1 in which the diameter of the bracket 12 is 10 mm or less, especially 4 mm to 8 mm, the terminal accommodating recess 13 and the lead wire outlet 18 are extremely small, and the soldering and the lead wire 15 are not provided. The workability of pulling out and drawing becomes poor. Therefore, the terminal accommodating recess 13 is expanded by the first ear piece accommodating recess 22, and the lead wire accommodating recess 1 is formed.
By expanding the terminal end of 7 (the portion where the protruding portion 19 is provided) with the second earpiece accommodating recess 23, it is possible to solder the terminal 10 or insert the lead wire 15 into the lead wire outlet 18. It will be easier.

In the above-described embodiment, since two terminals 10 and two lead wires 15 are assumed, the bracket 12 has the lead wire accommodating recess 17 and the terminal accommodating recess 1.
3 and two lead wire outlets 18 are formed, and further two first and second ear piece accommodating recesses 22 and 23 are provided, so that four ear pieces are required. Further, each ear piece 21 is evenly arranged with a phase angle of 90 °.

[0020]

Since the motor according to the present invention is constructed as described above, the following effects can be obtained. That is,
In a motor in which a bracket for fixing the terminal electrically connected to the brush is arranged at the rear end of the motor case, the bracket is formed on the outer end surface of the bracket and is a terminal for leading the terminal connected to the brush to the outside. An accommodating recess, a lead wire accommodating recess formed on the outer end surface of the bracket and extending in communication with the terminal accommodating recess and accommodating an end portion of a lead wire fixed to the terminal, and a lead wire formed on the outer end surface of the bracket. and a lead wire lead-out opening for sandwiching fixing the lead wire with provided at the end of the housing recess, Lee
Part of the bracket near the end of the recess
At the position facing the open part of the lead wire accommodating recess
Due to the protruding part, the lead wire outlet is approximately C-shaped
The lead wire is formed on the
The drawn part is along the axis of the motor shaft
By being oriented in the direction, the workability of assembling the device is good, and the breakage of the lead wire is less likely to occur.

[Brief description of drawings]

FIG. 1 is a perspective view showing an appearance of a bracket forming a main part of a motor according to the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a plan view showing a state in which a lead wire is laid around a bracket.

[Explanation of symbols]

1 ... Motor, 2 ... motor case, 5 ... shaft, 9 ... brush, 10 ... terminal, 12 ... bracket, the outer end face of 12a ... bracket 13 ... pin accommodating recess 15 ... lead wire,
17 ... Lead wire accommodating recess, 18 ... Lead wire outlet, 1
9 ... Projection part, 21 ... Ear piece, 22 ... 1st ear piece accommodation recessed part,
23 ... 2nd ear piece accommodation recessed part.

Claims (2)

(57) [Claims] 1. A motor in which a bracket for fixing a terminal electrically connected to a brush is disposed at a rear end of a motor case, wherein the bracket is formed on an outer end surface of the bracket and is connected to the brush. A terminal accommodating recess for guiding the terminal to the outside, and a lead wire accommodating recess formed in the outer end surface of the bracket for communicating with the terminal accommodating recess and accommodating an end portion of a lead wire fixed to the terminal. A recess and a lead wire outlet formed at the outer end surface of the bracket, provided at the end of the lead wire accommodating recess and sandwiching and fixing the lead wire, and in the vicinity of the end of the lead wire accommodating recess. , The above
It forms a part of the bracket and
Due to the protruding portion protruding to the position facing the open part,
The lead wire outlet is formed in a substantially C shape and is the lead wire, and is drawn from the lead wire outlet.
The exposed part is the direction along the axis of the motor shaft.
A motor characterized by being directed to . 2. A plurality of ear pieces that are provided at the rear end of the motor case and can be bent inward, and a first ear that communicates with the terminal accommodating recess and extends outward of the bracket. The bracket is caulked and fixed to the motor case by the cooperation of the one-piece accommodating recess and the second ear piece accommodating recess that communicates with the end of the lead wire accommodating recess and extends outward of the bracket. The motor according to claim 1, wherein: