JPH06129878A - Movement for instrument - Google Patents

Abstract

(57) [Summary] [Purpose] It is an object of the present invention to provide an instrument movement in which silicone oil for oil dump can be injected into the bobbin after the instrument is adjusted and adjusted. [Structure] The upper bobbin 2 and the lower bobbin 3 are provided with holes 2c and 3c communicating with the inside thereof, respectively, and lids 2d and 3d for closing the holes 2c and 3c integrally with the upper and lower bobbins 2 and 3, respectively. To provide. A magnet rotor 6 having a rotating shaft 7 is housed inside a bobbin 5 consisting of an upper bobbin 2 and a lower bobbin 3, and after adjusting the instruction, silicone oil is injected from the hole 2c to cover the holes 2c and 3c with the lids 2d and 3d.
Complete by closing with.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an instrument movement in which the movement of a rotating body housed inside a bobbin is controlled by silicone oil stored therein.

[0002]

2. Description of the Related Art Generally, vehicular meters such as speedometers and engine tachometers are of a type that displays the state of measured values in almost real time, and observers who display the changes in measured values in real time as they are. There is a type of certain control because appropriate information cannot be transmitted to. An example of the latter is a fuel gauge used in a vehicle. If the vehicle vibrates and the fuel level sensor in the fuel tank swings, and this information is displayed as it is as the indicator value of the fuel gauge, it is not possible to obtain the display that is actually needed, and the observer cannot see it. This is because appropriate information cannot be conveyed.

As described above, meters which are not suitable for real-time display conventionally include a device for suppressing the fluctuation of the sensor signal to display the meter, for example, a device which mechanically oil-dumps the movement of the meter. .

For example, in the case of a cross-coil type movement, as shown in FIG. 4, a highly viscous silicone oil 22 is stored inside a bobbin 21 composed of an upper bobbin 21a and a lower bobbin 21b formed of plastic. The magnet rotor 23 having the rotating shaft 23a in the center thereof is arranged therein to suppress the rotation of the magnet rotor 23. That is, even if the vehicle vibrates and the fuel level sensor in the fuel tank swings, a current flows through a cross coil (not shown) based on the signal, and the magnet rotor 23 tries to rotate in the direction of the generated magnetic field. Since the rotor 23 is immersed in the silicone oil 22, it does not react finely. Therefore, the indicated position of the pointer 24 attached to the rotary shaft 23a does not respond to a change due to vibration of the vehicle or the like.

Further, in particular, in the so-called needle type meters of the type in which the position of the pointer currently shown is kept as it is when the power is turned off, the amount of silicone oil 22 used is increased. Rotational resistance between the inner surface of the bobbin and the magnet rotor is increased to prevent movement of the pointing position of the pointer due to tilting of the vehicle body during parking.

[0006]

By the way, in general, the indication adjustment of a meter is performed as follows. That is, first, a predetermined input is given to the movement to rotate the rotation shaft of the movement, and then the pointer is driven into the rotation shaft so as to indicate the position of the scale corresponding to the predetermined input. However, as described above, when the magnet rotor of the movement is oil-dumped by the silicone oil, especially in the case of the needle-setting type that uses a large amount of silicone oil, the magnet rotor rotates slowly, and accordingly, the input signal is received. However, there is a problem in that it takes a long time to rotate, so that it takes a very long time to adjust the instruction.

It is an object of the present invention to provide an instrument movement in which silicone oil for oil dump can be injected into the bobbin after the instruction of the instrument is adjusted.

[0008]

According to the present invention, silicon oil is stored inside a bobbin consisting of an upper bobbin and a lower bobbin, and a rotary body having a rotary shaft is housed in the silicone oil. In the instrument movement in which the rotating shaft is projected outward from the bearing hole provided in the upper bobbin, a hole communicating with the inside of each of the upper bobbin and the lower bobbin is provided, and the upper bobbin and the upper bobbin are integrally formed with each other. It is characterized in that a lid is provided to close the hole.

In the instrument movement according to the present invention, the holes are arranged on the upper surface of the upper bobbin and the lower surface of the lower bobbin, and are separated from each other as much as possible, and the lid is arranged in the vicinity of these holes. Then, when the lid is rotated around the bobbin as a fulcrum, the lid is fitted and closed in the hole.

[0010]

Since the present invention is constructed as described above, the rotating body is first housed in the lower bobbin, and then the upper bobbin is fitted into the lower bobbin by passing the bearing hole of the upper bobbin through the rotary shaft of the rotating body. . In this state, a signal having a predetermined magnitude is input to the movement, the rotary shaft is instructed to indicate the scale position of the dial corresponding to this input, and the pointer is driven to adjust the instruction. After completing the instruction adjustment, inject silicone oil from the hole of the upper bobbin, rotate the lid of the lower bobbin at a suitable time to close the hole of the lower bobbin, and at the time when an appropriate amount of silicone oil is stored inside the bobbin. The hole for the upper bobbin is closed with the lid provided on the upper bobbin to complete the instrument movement.

As described above, since the silicone oil is injected into the bobbin after the pointer is adjusted,
At the time of the instruction adjustment, the rotation of the rotating body is not suppressed and the adjustment time can be shortened.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing an embodiment of an instrument movement according to the present invention. As shown in the figure, this instrument movement 1 has a bobbin 5 consisting of an upper bobbin 2 and a lower bobbin 3. A recess 3a is formed inside the lower bobbin 3, and a bearing 3b is provided at the center of the recess 3a. Further, a hole 3c communicating with the recess 3a is provided in the peripheral portion of the lower surface of the lower bobbin 3, and a lid 3d is formed integrally with the lower bobbin 3 near the place where the hole 3c is provided. ing.

A detail 3d ₁ is provided between the lid 3d and the bobbin 3, and a cylindrical projection 3d ₂ is provided on a part of the lid 3d so that the lid 3d can be rotated by bending the detail 3d _1. Then, the protrusion 3d ₂ is configured to fit into the hole 3c of the lower bobbin 3 and close the hole 3c.

On the other hand, the recess 2a is also formed inside the upper bobbin 2.
Is formed, and a bearing hole 2b penetrating to the outside is provided at the center of the recess 2a. Further, a hole 2c communicating with the recess 2a is provided in the peripheral portion of the upper surface of the upper bobbin 2, and a lid 2d having an integral structure with the upper bobbin 2 is provided near the place where the hole 2c is provided. Has been.
Similar to the case of the lower bobbin 3, there is a detail 2d ₁ between the lid 2d and the bobbin 2, and a cylindrical projection 2d ₂ is provided on a part of the lid 2d to cover the lid 2d. Detail 2d ₁
When is bent and rotated, the protrusion 2d ₂ fits into the hole 2c of the upper bobbin 2 and closes the hole 2c.

When these upper and lower bobbins 2 and 3 are fitted together, a disk-shaped magnet rotor 6 is housed in the space formed by the recesses 2a and 3a of the two, and the magnet rotor (rotating body) 6 The rotating shaft 7 at the center of the shaft is supported by the bearing 3b of the lower bobbin 3 and the bearing hole 2b of the upper bobbin 2, and one end of the rotating shaft 7 has a bearing hole 2 of the upper bobbin 2.
It extends through b and extends outward, and a pointer 8 is attached to its tip. 2 is a plan view of the instrument movement 1 with the pointer 8 removed, and FIG.
Is a bottom view. The cross coil wound around the surface of the bobbin 5 is not shown.

Since the instrument movement 1 of the present embodiment is constructed as described above, the instruction adjustment is performed by first applying an input signal of a predetermined value to a cross coil (not shown) to generate a synthetic magnetic field and to generate a magnet rotor. Rotate 6. next,
The pointer 8 is driven into the rotating shaft 7 of the magnet rotor 6. At this time, the scale position of the dial indicated by the pointer 8 corresponds to the value of the input signal. For example, when the input signal value is half the full scale of the instrument, the indication position of the pointer 8 is the center position of the scale of the dial.

After the instruction adjustment of the movement 1 is completed in this way, silicone oil is injected from the hole 2c of the upper bobbin 2, and the lid 3d of the lower bobbin 3 is rotated at an appropriate time to rotate the hole of the lower bobbin 3. 3c is closed, and when a proper amount of silicone oil is stored inside the bobbin 5, the hole 2 of the upper bobbin 2
The instrument movement 1 is completed by closing c with the lid 2d provided on the upper bobbin 2.

[0019]

As described above, since the instrument movement according to the present invention is configured to inject the silicone oil into the bobbin after the pointer is adjusted, the rotation of the rotating body is suppressed during the instruction adjustment. Therefore, the adjustment time can be shortened.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an embodiment of an instrument movement according to the present invention.

FIG. 2 is a plan view of the instrument movement shown in FIG.

FIG. 3 is a bottom view of the instrument movement shown in FIG.

FIG. 4 is a sectional view of a conventional instrument movement.

[Explanation of symbols]

 1 instrument movement 2 upper bobbin 2c hole 2d lid 3 lower bobbin 3c hole 3d lid 5 bobbin 6 magnet rotor (rotating body) 7 rotating shaft 8 pointer

Claims (2)

[Claims] 1. A bobbin consisting of an upper bobbin and a lower bobbin, in which silicon oil is stored, in which a rotating body having a rotating shaft is housed, and the rotating shaft of the rotating body is provided in the upper bobbin. In the instrument movement that protrudes outward from the bearing hole, a hole communicating with the inside of each of the upper bobbin and the lower bobbin is provided, and a lid for closing the hole integrally with each of the upper and lower bobbins is provided. An instrument movement characterized by being provided. 2. The holes are arranged on the upper surface of the upper bobbin and the lower surface of the lower bobbin, and are separated from each other within a possible range. Further, the lid is arranged in the vicinity of these holes, and the bobbin serves as a fulcrum. The instrument movement according to claim 1, wherein the instrument movement is configured so as to be fitted and closed in the hole when the instrument is rotated.