JP2937231B2 - Instrument movement - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movement for an instrument, and more particularly to a movement for an instrument characterized by a fixed structure of a mustache for a zero return.

[0002]

2. Description of the Related Art Conventionally, as a movement for an instrument,
Various movements have been used, such as a movement using a pulse motor as a drive source, and a cross-coil type movement in which a measurement current is applied to cross-wound coils and a magnet is rotated in the direction of the resultant magnetic field. For example, as an example of a cross-coil type movement, there is one shown in the cross-sectional view of FIG.

As shown in FIG. 1, this cross-coil type movement has a bobbin 1 formed by fitting an upper bobbin 1a and a lower bobbin 1b, and a magnet rotor 2 is disposed inside the bobbin 1. The magnet rotor 2 is provided with a disk-shaped magnet 2b having a pair of N and S poles magnetized on a peripheral portion and having a rotating shaft 2a at a central portion, and an upper portion of the rotating shaft 2a is provided on an upper bobbin 1a. holes 1a ₁ through projecting and the lower portion of the rotary shaft 2a is rotatably supported by the bearing portion 1b ₁ of the lower bobbin 1b.

A plurality of coils 3 are provided outside the bobbin 1.
Are crossed and wound, and when a drive current that changes in accordance with the measured amount flows through the coils 3, magnetic fields are generated in the respective coils 3, and the magnet rotor 2 is moved in the direction of the combined magnetic field of the generated magnetic fields. Is rotated, and a measurement amount is displayed on a dial (not shown) by a pointer (not shown) attached to the rotating shaft 2a of the magnet rotor 2. On the other hand, as a return-to-zero mechanism for returning the hands to the zero position when the current for driving the movement is turned off, the mustache Zenmai 5, which is often used here, is also used. Beard total Mai 5 has one end attached to the stud 4 fitted to the rotary shaft 2a, and the other end is fixed to the protrusion 1a ₂ of the upper end portion of the upper bobbin 1a, returning the pointer by the rotation torque It is set to zero. In addition,
Reference numeral 6 in the drawing denotes a cover, which has a structure to be fitted from above the upper bobbin 1a, and has a role of protecting the coil 3 and the mustache.

[0005]

Normally, as described above, when the beard Zenmai 5 is used as the return-to-zero structure, one end is fixed to the beard holder 4 and the other end is fixed to the bobbin 1 somewhere. However, since the method of fixing to the bobbin 1 is performed by welding or bonding, there is a problem that work quality is poor and the use of an adhesive increases costs.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a movement for an instrument which can fix a mustache in a simple structure.

[0007]

According to the present invention, a rotating body having a lower end portion of a rotating shaft supported by a bearing inside the bobbin main body is disposed inside a bobbin main body including an upper bobbin and a lower bobbin. In an instrument movement having a structure in which an upper end portion of the rotation shaft projects outward from the bobbin main body, a zero-return mustache is attached to that portion, and a pointer is attached via a cover, the bobbin main body includes a mustache. A beard whole dance support part is provided, and a beard whole dance fixed part is provided at a position facing the beard whole dance support part of the cover, and after the beard whole dance support part supports the mustache whole dance, It is characterized in that, by covering the cover, the beard entire dance fixing portion engages with the mustache full dance support portion to fix the mustache full dance.

In the instrument movement according to the present invention, the whole mustache support portion is formed by a columnar boss having a cut groove in the center, and the whole mustache fixing portion is covered by the boss. While consisting of a cylindrical boss cover,
The boss cover is also provided with a notch at a position facing the notch groove of the beard full dance support portion.

[0009]

The present invention is configured as described above.
To fix the mustache, first, attach the mustache to the mustache that is fitted to the rotating shaft as usual, fix one end to the mustache, and attach the other end to the boss, which is the bobbin's mustache support. Insert it into the notch in the center. Next, when the cover is put on from above the upper bobbin, the substantially cylindrical boss cover, which is the fixed part of the cover, is covered with the boss. For this reason, the mustache is prevented from moving up and down in a state where it is sandwiched between the cut groove of the boss and the cutout of the boss cover, and the tip is generally bent into an L-shape so that it cannot be removed. So that it is completely fixed.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 (a), (b) and (c) show an embodiment of the instrument movement according to the present invention.
(A) is an exploded perspective view, (b) is an exploded perspective view of a main part of (a), and (c) is a cross-sectional view of a main part in a state in which the whole mustache is fixed. In FIG. 1A, illustration of a rotating body, a rotating shaft, a coil lower bobbin, and the like, which are not characteristic parts of the present invention, is omitted.

As shown in FIG. 1, a mustache 14 is fitted to a rotating shaft (not shown) extending through a hole 12 provided on the upper side of the upper bobbin 10. The whole dance 15 is attached, and one end of the mustache whole dance 15 is fixed to the beard holder 14. Also, upper bobbin 1
The upper surface of the cover 0 is provided with three bosses 10A, and the cover 16 is also provided with three holes 16A. By fitting these bosses 10A into the holes 16A of the cover 16, It can be mounted. One of the bosses 10A serves as a mustache dance support for supporting the other end of the mustache dance 15, and is formed in a columnar shape as shown in FIG. Notch groove 10
A ₁ is provided.

Meanwhile, the hole 16A of the position of the cover 16 opposite to the boss 10A ₁ is formed in a substantially cylindrical shape,
A boss cover (corresponding to a mustache full dance fixing portion of the present invention) 16A that covers the boss 10A is provided. The boss cover 16
Missing 16A ₁ cut in a position opposed to the notches 10A ₁ of the boss 10A of the A is provided. The fixing of the beard total Mai 15, just inserting the end of the beard total Mai 15 to cut grooves 10A ₁ of the boss 10A, after the if covered with the cover 16 on the bobbin 10, Bosukaba 16A of the cover 16
However, since the boss 10A covers the boss 10A, the beard full dance 15 is fixed. In other words, the horizontal movement of the mustache whole dance 15 is
Is regulated by the notches 10A ₁ of A, the vertical movement is restricted by the upper end portion of the notch 16A ₁ of the lower end and Bosukaba 16A of notches 10A ₁ of the boss 10A,
Further, the movement in the front-back direction is completely fixed by being regulated by the L-shaped bent end portion 15A of the beard full dance 15 and the urging force to be involved.

As described above, since the end of the beard can be fixed simply by covering the bobbin 10 with the cover 16 without welding or bonding, the work life is improved and the use of the adhesive is also improved. Since it is not required, the cost can be reduced. In this embodiment, the end of the mustache is fixed by the boss provided on the upper bobbin. However, the same may be applied by providing the boss on the lower bobbin. In addition, this structure can be applied to various movements such as a pulse motor of a type using a mustache full-bounce for return-to-zero and a cross-coil type movement.

[0014]

As described above, according to the present invention, the bobbin main body is provided with the mustache full dance support portion for supporting the mustache full dance, and the cover is provided at a position facing the beard full dance support portion. The whole dance fixed part is provided, and after the mustache whole dance support part supports the mustache whole dance, the beard whole dance fixed part is engaged with the mustache whole dance support part to fix the mustache whole dance by covering it. As a result, the working life is improved and the cost can be reduced.

Further, in the present invention, the whole mustache support portion is formed by a columnar boss having a cut groove in the center, and the whole mustache fixing portion is constituted by a substantially cylindrical boss cover covering the boss. In addition, since the cutout is provided at a position of the boss cover facing the cut groove of the beard whole dance support portion, the beard whole dance can be fixed with a simple structure.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, wherein (a) is an exploded perspective view,
(B) is an exploded perspective view of a main part of (a), and (c) is a cross-sectional view of the main part in a state where a mustache is fixed.

FIG. 2 is a cross-sectional view of a conventionally used cross-coil type movement.

[Explanation of symbols]

Reference Signs List 10 Upper bobbin 10A Boss (whisker whole dance supporting part) 10A ₁ Cut groove 14 Beard holding 15 Whisker whole dance 16 Cover 16A Boss cover (whisker whole dance fixing part) 16A ₁ notch

Claims (2)

(57) [Claims] 1. A rotating body having a lower end portion of a rotary shaft supported by a bearing inside the bobbin main body, and a top end portion of the rotary shaft being disposed inside a bobbin main body including an upper bobbin and a lower bobbin. An instrument movement having a structure that projects outward from the main body, has a zero-revolution mustache attached thereto, and attaches a pointer via a cover, wherein the bobbin main body supports a full-revolution beard. A beard complete dance fixing part is provided on the cover at a position facing the beard complete dance support part, and after the beard complete dance support part supports the beard complete dance, the cover is covered to cover the beard complete dance. A movement for an instrument, wherein a dance fixing part is engaged with a mustache full dance support part to fix a mustache full dance. 2. The whisker full dance support portion is formed by a columnar boss having a cut groove at the center, and the whisker full dance fixing portion is constituted by a substantially cylindrical boss cover that covers the boss. 2. The instrument movement according to claim 1, wherein a cutout is provided at a position of the boss cover facing the cut groove of the beard full dance support portion.