JP2007215287A - Vibrating motor and mounting body of vibrating motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibrating motor that can prevent the front fall-down of the motor when mounted to a base board, and can increase a vibration amount without receiving the regulation of a placing position and without increasing the weight of an eccentric weight. <P>SOLUTION: The vibrating motor 1 comprises: a motor case 10; a motor shaft 11 that is attached with the eccentric weight 13 at its top that is protruded from the front end of the motor case 10; an end lid 16 that closes the rear end of the motor case 10; and a current-applying terminal 14 that is drawn out of the motor case 10 to the outside from the end lid 16. A relay terminal piece 20 connected to a connecting terminal (not shown in Fig.) that is formed on the base board 30 is connected to the current-applying terminal 14. The vibrating motor 1 accommodates a part of the motor case 10 in a hole 31 of the base board 30, and is slantly fixed in a state that the eccentric weight 13 is obliquely and upwardly oriented. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vibration motor having an eccentric weight used for a mobile phone or the like and a mounting body thereof.

  Conventionally, as disclosed in, for example, Japanese Patent Application Laid-Open No. 2004-88918, a vibration motor is composed of a motor body with a brush and an eccentric weight attached to a motor shaft protruding from the motor body. It is mounted in a recumbent posture on a substrate built into the board.

JP 2004-88918

  However, due to the trend toward larger (weighted) eccentric weights or smaller motor bodies, the center of gravity of the vibration motor is positioned closer to the eccentric weight, and the vibration motor is soldered to the substrate using a reflow furnace. In the case of fixing, when the vibration motor is placed on the substrate, the motor main body floats from the substrate on the rear end side and tilts toward the eccentric weight side, and the vibration motor is tilted forward. In the vibration motor in the forward tilted position, the motor terminal and the conductive pattern on the substrate do not adhere to each other, and the substrate cannot be fed into the reflow furnace as it is.

  In order to amplify the vibration amount of the vibration motor, besides increasing the size of the eccentric weight (weighting), a method of increasing the rotation radius of the eccentric weight is effective. It is difficult to make the rotational radius of the eccentric weight larger than the diameter of the motor. However, if the vibration motor is placed on the end of the substrate and the eccentric weight is taken out of the substrate, the rotational radius of the eccentric weight can be increased. Will be subject to regulations.

  Therefore, in view of the above problems, an object of the present invention is to provide a vibration motor that can prevent forward tilting when mounted on a substrate, and can increase the rotational radius of an eccentric weight without being restricted by the mounting position. And providing an implementation thereof.

  In order to solve the above-described problem, the vibration motor according to the present invention has an eccentric weight attached to the tip of the motor shaft protruding from the front end of the motor case, and the rear end of the motor case is closed by the end cover. A vibration motor with an energization terminal drawn out to the outside, a relay terminal piece connected to the energization terminal is fixed to the rear side of the end cover, and the relay terminal piece has an attachment portion facing the end cover, It has a plate-shaped protrusion part protruded further back from the attachment part, It is characterized by the above-mentioned.

  The mounting portion faces the end lid in a plane substantially perpendicular to the motor shaft, and the plate surface of the projecting portion forms an obtuse opening angle with respect to the facing surface of the mounting portion and the end lid. Features.

  Furthermore, in the mounting body of the vibration motor according to the present invention, an eccentric weight is attached to the tip of the motor shaft protruding from the front end of the motor case, and the rear end of the motor case is blocked by the end lid, Is a mounting body of a vibration motor on which a vibration motor from which a current-carrying terminal is drawn out is mounted on a substrate, and a relay terminal piece connected to the current-carrying terminal is fixed to the rear side of the end cover. It has a mounting part facing the end lid and a plate-shaped protruding part that protrudes further rearward from the mounting part, and a part of the motor case is accommodated in a hole formed in the substrate, and the plate surface of the protruding part Is connected so as to face a connection terminal formed on the substrate.

  Further, the mounting portion faces the end cover in a plane substantially perpendicular to the motor shaft, and the plate surface of the projecting portion forms an obtuse opening angle with respect to the facing surface of the mounting portion and the end cover. Is inclined with respect to the plate surface of the substrate.

  Further, the motor case is characterized in that it is in contact with a part of the peripheral edge of the hole at a location away from the connection terminal on the substrate.

  When the vibration motor is fixed to the hole, the vibration motor is fixed obliquely with the eccentric weight directed obliquely upward, so that the vibration motor can be prevented from falling forward. In addition, since the eccentric weight faces obliquely upward, a space can be secured between the eccentric weight and the rotation radius of the eccentric weight can be increased accordingly.

  Here, if the peripheral edge of the hole portion of the substrate has a width substantially equal to the width of the motor case, it is possible to suppress lateral blur when the vibration motor is fixed, and it is possible to attach with high accuracy. .

  In addition, if the periphery of the hole of the board has a trapezoidal shape or a triangular shape where the lateral width gradually decreases at a location away from the connection terminal, the motor case is fixed to the connection terminal and the base when the vibration motor is fixed. Since the three-point contact is fixed to both ends of the shape (triangular) width, the fixing strength and fixing accuracy of the motor are improved.

  Furthermore, if the periphery of the hole of the board has a semi-elliptical shape at a location away from the connection terminal, the contact between the motor case and the board becomes surface contact when the motor case is circular, so the motor The fixing strength and fixing accuracy are further improved.

  In addition, when the plate surface of the protruding portion of the relay terminal piece is formed so as to be opposed to the connection terminal when the vibration motor is fixed to the hole portion, the contact between the protruding portion and the connection terminal of the substrate is good. Thus, the fixing strength and fixing accuracy of the motor are improved, and the soldering strength is also improved.

  The plate surface of the protruding portion of the relay terminal piece is formed so as to form an acute opening angle with respect to the opposing surface of the mounting portion and the end lid, and the plate surface of the protruding portion and the connection terminal of the substrate are soldered, It is also possible to fix the motor in a slanting manner, in which case it is not necessary to form a hole in the board, but considering the fixing strength of the motor, the space in the height direction, ease of installation, etc. It is preferable to adopt the configuration of the present invention.

  In the present invention, since the vibration motor is fixed obliquely with the eccentric weight directed obliquely upward, the vibration motor can be prevented from falling forward. In addition, since the eccentric weight faces obliquely upward, a space can be secured between the eccentric weight and the rotation radius of the eccentric weight can be increased accordingly, and the vibration motor can be increased without increasing the weight of the eccentric weight. The amount of vibration can be increased without being restricted by the mounting position.

  Furthermore, the peripheral edge of the hole of the substrate has a rectangular shape whose lateral width is substantially equal to the lateral width of the motor case, has a trapezoidal shape or a triangular shape, or has a semi-elliptical shape. Fixing accuracy is improved.

  In addition, if the plate surface of the protruding portion of the relay terminal piece of the vibration motor is formed so as to be opposed to the connection terminal when the vibration motor is fixed to the hole, the fixing strength and fixing accuracy of the motor are improved. Also, the soldering strength is improved.

  Next, embodiments of the present invention will be described with reference to the accompanying drawings.

  1A is an assembled perspective view showing a vibration motor and a relay terminal piece according to an embodiment of the present invention, FIG. 1B is a plan view in which the relay terminal piece is connected to the vibration motor, and FIG. a) is a perspective view showing a state in which the vibration motor is mounted on a substrate, FIG. 2B is a cross-sectional view showing the state, FIG. 3A is a front view of a relay terminal piece of the vibration motor, FIG. 3B is a side view of the relay terminal piece.

  The vibration motor 1 of the present embodiment includes a motor case 10, a motor shaft 11 having an eccentric weight 13 attached to a tip protruding from the front end of the motor case, an end cover 16 that closes the rear end of the motor case 10, It has a current-carrying terminal 14 drawn out of the motor case 10 from the end lid 16. A relay terminal piece 20 connected to the energizing terminal 14 is fixed to the rear side of the end cover 16, and the relay terminal piece 20 includes a mounting portion 20 a facing the end cover 16 and a plate protruding further rearward from the mounting portion 20 a. The mounting portion 20a is opposed to the end lid 16 in a plane substantially perpendicular to the motor shaft 11, and the plate surface of the protruding portion 20b is connected to the mounting portion 20a and the end lid 16. An obtuse angle is formed with respect to the opposite surface.

  The plate surface of the protruding portion 20b is connected so as to face a connection terminal (not shown) formed on the substrate 30. Reference numeral 15 denotes a protrusion for positioning when the relay terminal piece 20 is fixed to the end cover 16, and 21 is a hole for fitting the protrusion 15.

  A hole 31 is formed in the substrate 30, and the vibration motor 1 accommodates a part of the motor case 10 in the hole 31 and makes the plate surface of the protruding portion 20 b face a connection terminal (not shown). Are connected and fixed.

  When the vibration motor 1 is fixed to the hole 31, the motor shaft 11 is inclined with respect to the plate surface of the substrate 30.

Therefore, the vibration motor 1 is fixed obliquely with the eccentric weight 13 directed obliquely upward. Thereby, it is possible to prevent the vibration motor 1 from falling forward. Further, since the eccentric weight 13 faces obliquely upward, a space can be secured between the eccentric weight 13 and the rotation radius of the eccentric weight 13 can be increased correspondingly. Since the vibration motor 1 can be molded in place, the vibration motor 1 can increase the amount of vibration without increasing the weight of the eccentric weight 13 and without being restricted by the placement position of the substrate 30. .
Further, if the relay terminal piece 20 has the protruding portion 20b as described above, the contact area between the protruding portion 20b and a connection terminal (not shown) formed on the substrate 30 is increased, and the vibration motor 1 is stabilized. Therefore, the fixing strength and fixing accuracy of the vibration motor 1 are improved, and the soldering strength between the vibration motor 1 and the substrate 30 is also improved.

  In addition, in this example, although the protrusion part 20b protrudes from the end of the attachment part 20a, this example is not limited to this, For example, the structure made to protrude from the center part of the attachment part 20a is also possible.

  FIG. 4A is a perspective view showing a substrate (hole) according to Embodiment 2 of the present invention.

  In this embodiment, the peripheral edge of the hole 41 of the substrate 40 has a rectangular shape in which the width N is substantially equal to the width of the motor case 10, and the vibration motor 1 is fixed when the vibration motor 1 is fixed to the hole 41. Lateral blurring can be suppressed, and high-precision mounting becomes possible.

  FIG. 4B is a perspective view showing a substrate (hole) according to Embodiment 3 of the present invention.

  In the present embodiment, the peripheral edge 51a of the hole 51 of the substrate 50 has a trapezoidal shape in which the lateral width N ′ is gradually narrowed away from the connection terminal (not shown). At the time of fixing, the motor case 10 is fixed by contact at three points between a connection terminal (not shown) and both ends of the trapezoidal peripheral edge 51a, so that the fixing strength and fixing accuracy of the vibration motor 1 are improved.

  In addition, although the peripheral edge 51a of the hole 51 of the present embodiment has a trapezoidal shape, for example, a similar effect can be expected even in a triangular shape.

  FIG.4 (c) is a perspective view which shows the board | substrate (hole part) concerning Example 4 of this invention.

  In this embodiment, the peripheral edge 61a of the hole 61 of the substrate 60 has a semi-elliptical shape at a position away from the connection terminal (not shown), and the contact between the circular motor case 10 and the peripheral edge 61a is surface. Since contact is made, the fixing strength and fixing accuracy of the vibration motor 1 are further improved.

(A) is an assembly perspective view which shows the vibration motor and relay terminal piece concerning the Example of this invention, (b) is the top view which connected the relay terminal piece to the vibration motor. (A) is a perspective view which shows the state which mounted the vibration motor on the board | substrate, (b) is sectional drawing which shows the same state. (A) is a front view of the relay terminal piece of the vibration motor, and (b) is a side view of the relay terminal piece. (A) is a perspective view which shows the board | substrate (hole part) concerning Example 2 of this invention, (b) is a perspective view which shows the board | substrate (hole part) concerning Example 3 of this invention, (c) is this invention. It is a perspective view which shows the board | substrate (hole part) concerning the Example 4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Vibration motor 10 ... Motor case 11 ... Motor shaft 13 ... Eccentric weight 14 ... Current supply terminal 15 ... Protrusion 16 ... End cover 20 ... Relay terminal piece 20a ... Mounting part 20b ... Projection part 21 ... Hole 30, 40, 50, 60 ... Substrate 31, 41, 51, 61 ... Hole 51a, 61a ... Periphery

Claims (7)

This is a vibration motor in which an eccentric weight is attached to the tip of a motor shaft protruding from the front end of the motor case, the rear end of the motor case is closed by an end cover, and an energizing terminal is drawn out of the motor case. And
A relay terminal piece connected to the energizing terminal is fixed to the rear side of the end lid,
The relay terminal piece includes a mounting portion facing the end cover, and a plate-shaped protruding portion that protrudes further rearward from the mounting portion. The mounting portion is opposed to the end lid on a surface substantially perpendicular to the motor shaft,
The vibration motor according to claim 1, wherein the plate surface of the projecting portion forms an obtuse open angle with respect to a facing surface between the mounting portion and the end lid. A vibration motor in which an eccentric weight is attached to the tip of the motor shaft protruding from the front end of the motor case, the rear end of the motor case is closed by an end cover, and an energization terminal is drawn out of the motor case, A mounting body of a vibration motor mounted on a wiring board,
A relay terminal piece connected to the energizing terminal is fixed to the rear side of the end lid,
The relay terminal piece has a mounting portion facing the end lid, and a plate-shaped protruding portion that protrudes further rearward from the mounting portion,
A part of the motor case is accommodated in a hole formed in the wiring board,
A mounting body of a vibration motor, wherein a plate surface of the protruding portion is connected to a connection terminal formed on the wiring board. The mounting portion is opposed to the end lid on a surface substantially perpendicular to the motor shaft,
The plate surface of the projecting portion forms an obtuse angle with respect to the opposing surface of the mounting portion and the end lid,
The vibration motor mounting body according to claim 3, wherein the motor shaft is inclined with respect to a plate surface of the wiring board.   5. The vibration motor mounting body according to claim 3, wherein the motor case is in contact with a part of a peripheral edge of the hole at a position away from the connection terminal on the wiring board.   The vibration motor mounting body according to claim 5, wherein a peripheral edge of the hole has a rectangular shape having a width substantially equal to a width of the motor case.   The vibration motor mounting body according to claim 5, wherein a peripheral edge of the hole portion has a trapezoidal shape, a triangular shape, or a semi-elliptical shape in which a lateral width is gradually narrowed at a position away from the connection terminal.