JP3371246B2 - Servo accelerometer - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a servo type accelerometer, and more particularly to a servo type accelerometer having a Toruca coil pendulum assembly having a Toruca coil integrally formed with a terminal tongue on a coil bobbin.

[0002]

2. Description of the Related Art A conventional example of a servo type accelerometer will be described with reference to FIG. In FIG. 4, reference numeral 10 denotes a base of the servo-type accelerometer, which is attached and fixed to an aircraft, a vehicle, a building, or other moving or vibrating moving body through the base 10. When the acceleration α is not applied to the moving body, no force is applied to the pendulum 14 of the mass M of the servo-type accelerometer attached to the moving body, and the pendulum 14 is assumed to be stationary in the neutral position.

When the acceleration α is applied to the moving body, a force proportional to the acceleration α is applied to the pendulum 14. F = Mα (1) F: Force M: Pendulum mass α: Acceleration The pendulum 14 is fixed to the base 10 of the servo-type accelerometer via the hinge portion 19 and tends to be displaced when the acceleration α is applied. The displacement of the pendulum 14 changes the amount of light passing through the displacement detecting section including the light emitting element 20 and the photo sensor 21, and is converted and detected as an electric signal proportional to the change. This converted and detected electric signal is amplified by the servo amplifier 22 having an extremely large amplification degree, and a current proportional to the displacement of the pendulum 14 proportional to the acceleration α is passed through the torquer coil 12. Reference numeral 11 is a magnet forming a ToruCa, and a Toruca coil 12
It forms a strong magnetic field linked to the magnetic field generated by. In this way, when the torquer current I proportional to the acceleration α flows through the torquer coil 12, a force represented by the following equation is relatively present between the magnetic field generated proportionally to this and the magnetic field strength B formed by the magnet 11. Occurs.

F ′ = BI ·············· (2) Here, the servo amplifier 22 of the above By properly adjusting the amplification degree, the pendulum 14 can be returned to the neutral position which is the original position when the acceleration α is not applied. From the formulas (1) and (2), F = Mα = F '= B · I (3), and the input acceleration α is the torquer current. Proportional to I.

This Toruca current I is a voltage V = R · I across the reading resistor 23 connected in series.・ ・ ・ It can be measured by reading (4). As a result, the input acceleration α can be finally known. here,
The torquer coil of the servo accelerometer described above will be described with reference to FIGS. FIG. 5 is a view showing a cross section of the coil bobbin, and FIG. 6 is a view showing a cross section of the Toruca coil in which the coil bobbin and the coil winding wire are assembled.

Referring to FIG. 5A, the Toruca coil 1
The second coil bobbin 13 is made of aluminum as a raw material and has its surface subjected to an insulating coating or other insulating treatment, or is made of an insulating material as a raw material and formed into a ring shape. 131 is a coil bobbin 13
And a coil 15, which will be described later, is joined to the upper surface of the flange. 132 is a side slit and 133 is a lower slit. The width of these slits is formed to be approximately equal to the diameter of the coil winding wire. With reference to FIG. 5B, this corresponds to the coil bobbin in which the second flange 131 ′ is further added to the coil bobbin 13 of FIG. 5A.
Referring to FIG. 5C, this corresponds to the coil bobbin in which the bottom surface 134 is formed on the coil bobbin 13 of FIG. 5A. A flange 135 is formed on the bottom surface 134.
Reference numeral 136 is a low surface slit formed from the flange 135 to the bottom surface 134.

Referring to FIG. 6A, this is shown in FIG.
It is the torquer coil 12 integrally formed by joining the lower surface of the coil 15 separately formed to the upper surface of the flange 131 of the coil bobbin 13 of (a). The coil end 151 is temporarily fixed in a state of being sandwiched between the side slit 132 and the lower slit 133, and the free end extends from here. Figure 6
Referring to (b), this forms the coil 15 in the region between the flange 131 and the second flange 131 ′ of the coil bobbin 13 of FIG. 5 (b), and the coil terminal 151 and the second coil terminal 151 ′ are formed. Is temporarily fixed while being sandwiched between the side slits 132 and the lower slits 133,
The free end extends from here. 6 (c), this is the flange 1 of the coil bobbin 13 of FIG. 5 (c).
31 and the coil 15 is formed in the area between the flange 135 of the bottom surface 134, and the coil end 151 is formed by the low surface slit 1
It is temporarily fixed in a state of being sandwiched by 36, and the free end extends from here.

Referring to FIG. 8, the two coil terminals 151 of the Toruca coil 12 as described above are coil bobbins 13.
Terminal portions 152 and second portions of the printed wiring formed on the surface of the weight of the pendulum 14 by being pulled out from the side slits 132 and the lower slits 133 and then cut out to a required length. Terminal part 1
52 ' .

A conventional example of how to connect the coil end 151 of the Toruca coil 12 is shown in FIG. In FIG. 7, the coil 15 is wound around the coil bobbin 13. 11 is a magnet, 151 is a coil 1
5 is a coil terminal. The pendulum 14 holds the coil bobbin 13 and integrally forms a blocking member on the free end side. The hinge portion 19 of the pendulum 14 is the circuit board 16
It is bonded to the. A square hole for arranging the pendulum 14 is formed in the center of the circuit board 16. 1
Reference numeral 7 is an electric terminal for connecting the coil terminal 151 of the coil 15, and the coil terminal 151 is electrically and mechanically connected by winding the coil terminal 151 around the electric terminal several times.

[0010]

As described above, in the conventional example of the Toruca coil 12, although the coil end 151 is temporarily fixed to the side slit 132 and the lower slit 133 of the coil bobbin 13, this temporary fixing is required. It is hard to say that it is certain, and it is equivalent to being in a free state.
When the coil end 151 is positioned at the terminal portion 152 on the surface of the pendulum 14 to be joined on the one hand, and the soldering is performed on the other hand, there is a great risk of damaging the coil, and careful handling is required. To do. As shown in the embodiment of FIG. 7, the circuit board 16 is separately prepared, the electric terminal 17 is attached and fixed to the circuit board 16, and the coil terminal 151 is fixed to the electric terminal 17 to surely fix the coil terminal 151. You can In the embodiment shown in FIG. 7, the coil terminal 151 can be securely fixed without damaging the Toruca coil 12, but the electric terminal 17 and the circuit board 16 to which the coil terminal 151 is attached are separately required, and the coil bobbin 13 and The process of assembling the coil 15 and the process of fixing the coil terminal 151 to the electric terminal 17 are naturally different processes.

The present invention has a coil bobbin 13 and a coil 1.
5 of the assembly process as well as to very easily assemble the torquer coils pendulum which is integrally molded bonding the Torukakoiru 12 assembled bobbin 13 and coil 15 to the pendulum 14, as much as possible small number of parts required <br / > a Te comb there is provided a servo accelerometer which solves the above problems.

[0012]

According to a first aspect of the present invention, in a servo type accelerometer, a coil 15 and a terminal tongue piece 18 bent in a crank shape to which a coil end 151 of the coil 15 is attached are insert-molded into one body. to constitute a servo accelerometer having a Torukakoiru 12 comprising more coil bobbin 13 configured.

According to a second aspect of the present invention, there is provided a servo type accelerometer.
The coil 15 and the coil end 151 of the coil 15.
Insert mold the terminal tongue piece 18 to be attached
Toluca carp consisting of the coil bobbin 13 integrally formed
The electro-mechanical coupling of the tool 12 to the pendulum 14
Servo type accelerometer by assembling Luka coil pendulum
Configured.

Claim 3: Claims 1 and 2
In the servo type accelerometer described in any of
The terminal tongue piece 18 has one end as a winding end 181.
While projecting outward from the side of the coil bobbin,
The bobbin from the inside area of the bobbin with the end as the contact end 182.
Wrap the coil end 151 around it by protruding slightly from the lower end.
Servo-type accelerometer attached to the end portion 181
Configured.

And claim 4 : claim 1 to claim
In the servo type accelerometer described in any of 3 ,
The contact end portion 18 of the terminal tongue piece 18 is provided on the surface of the pendulum 14.
A servo-type accelerometer having a contact portion 141 corresponding to No. 2 formed into a film was constructed. Further, claim 5 : claim 1 to claim
In the servo type accelerometer described in any one of item 3 ,
An adhesive is applied to the lower end of the coil bobbin from which the terminal tongue piece 18 is projected, and the Toruca coil 12 is pressed against the surface of the pendulum 14 while the contact end 182 is positioned at the contact portion 141 to form a Toruca coil pendulum assembly. The servo type accelerometer was constructed.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to FIGS. First, referring to FIG.
1A and 1B are views showing a cross section of the coil bobbin. In FIG. 1 (a), a coil bobbin 13 is made of a synthetic resin material such as liquid crystal polymer and two terminal tongues 18 made of an elastic conductive material such as phosphor bronze are insert-molded and integrally molded near the lower end thereof. . The two terminal tongues 18 are bent in a crank shape in the embodiment of FIG. The terminal tongue piece 18 is bent and integrally molded with the coil bobbin 13, and one end of the terminal tongue piece 18 is projected as a winding end 181 to the outside from the side surface of the bobbin and the other end is contacted with the contact end 1.
Reference numeral 82 is slightly projected from the bobbin inner region from the bobbin lower end. The shorter one of these two terminal tongues 18 is designated as the second terminal tongue 18 '.

The coil bobbin 13 has a flange 131 formed around the entire upper end thereof. Flange 13
A side slit 132 is formed at one of the positions 1. As the side slits 132, those having an extremely narrow slit width corresponding to the thickness of the winding wire forming the coil are formed, and thereby the inserted coil end is held. Figure 1
1B shows a coil bobbin 13 illustrated and described with reference to FIG. 1A, in which a second flange 131 'is formed over the entire circumference between the flange 131 and the terminal tongue piece 18 integrally formed near the lower end. Equivalent to what you did.

Referring to FIG. 2, FIG. 2 (a) is shown in FIG.
It is a figure which shows the cross section of the Toruca coil which joined and integrated the coil to the coil bobbin of (a), and FIG.2 (b) is the perspective view which looked at the Toruca coil of FIG.2 (a) from the upper side,
FIG. 2C is a perspective view of the Toruca coil of FIG. 2A viewed from the lower side. In FIG. 2A, the coil 15 has the lower surface joined and integrated with the upper surface of the flange 131 of the coil bobbin 13 via an adhesive to form the Toruca coil 12.
In this case, the coil 15 is configured in advance so that its inner diameter and outer diameter correspond to the inner diameter and outer diameter of the flange 131 of the coil bobbin 13, respectively. When the two are joined and integrated, the coil terminal 151 and the second coil terminal 1
51 'corresponds to the terminal tongue 18 and the second terminal tongue 1
Wind around the winding end 181 of 8 '. By performing soldering at the coil terminals of the winding end portion 181 is wound, that Ki out that to secure the electrical mechanical coupling therebetween.

Referring to FIG. 3, FIG. 3A is a view showing a cross section of the Toruca coil 12 joined to the pendulum 14 and assembled, and FIG. 3B is a view showing the surface of the pendulum 14. In these drawings, common reference numerals are given to members common to the reference numerals in the conventional example. FIG. 3A shows a design in which the coil bobbin 13 and the coil 15 are assembled and fixed to both surfaces of the pendulum 14. The pendulums 14 that are joined and fixed to both surfaces are the same, and the coils 15 on both surfaces are electrically connected to each other to form a single Toruca coil 12. It is not the case that the Toruca coil 12 is formed separately on both surfaces.
In this embodiment, the pendulum 14 is formed by etching synthetic quartz glass as a raw material. Contact part 141 and second contact part 141 ′
Is formed on the surface of the pendulum 14 made of this synthetic quartz glass. The contact portion 141 on the upper surface is connected to the contact portion on the surface through the through hole 142, and thus the coils 15 on both surfaces are electrically connected to each other as described above.
A single Toruca coil 12 can be configured.

In order to construct the Toruca coil pendulum assembly by attaching and fixing the Toruca coil 12 in which the coil bobbin 13 and the coil 15 are assembled to the surface of the pendulum 14, the terminal tongues 18 and 18 'are projected. An adhesive is applied to the lower end of the coil bobbin and pressed against the surface of the pendulum 14. In this case, as described above, the terminal tongues 18 and 18 'are bent in the shape of a crank, and the other ends are used as the contact end 182 and the second contact end 182' from the bobbin inner region to the coil bobbin lower end. The contact end portion 182 and the second contact end portion 182 ′ are formed on the surface of the pendulum 14 to form a film.
And, the second contact portion 141 'is pressed and held while being positioned. By this pressing, the contact end portion 182 and the second contact end portion 182 ′ are elastically deformed, and the electrical contact between the torquer coil 12 and the pendulum 14 while being pressed against the contact portion 141 and the second contact portion 141 ′ on the surface of the pendulum 14 The ToruCa coil pendulum assembly that has been mechanically assembled is constructed. These contact parts 141
It is possible to reinforce the pressure contact area of the contact end 182 with a conductive adhesive or solder to prevent vibration from externally applied and prevent disconnection of the connection due to impact.

[0021]

As described above, according to the present invention, the coil bobbin material is made of a non-metallic material, and the insert bobbin is formed by using the insert molding molding technique and other molding techniques. By integrally molding the pieces, the coil can be terminated in the state of the Toruca coil in which the coil is formed on the coil bobbin, and this can be easily performed when the Toruca coil is electromechanically coupled to the pendulum. That is, in order to attach and fix the Toruca coil in which the coil bobbin and the coil are assembled to the surface of the pendulum 14, an adhesive is applied to the lower end of the coil bobbin from which the terminal tongue is projected,
The contact end of the terminal tongue is pressed against the surface of the pendulum to the corresponding contact formed on the surface of the pendulum, and is pressed and held. By this pressing, the terminal tongue piece is elastically deformed, and the electro-mechanical assembly of the Toruca coil and the pendulum is completed in a state where the contact end portion is in pressure contact with the contact portion on the surface of the pendulum. As described above, the coupling of the Toruca coil and the pendulum is performed mechanically and electrically at the same time as the mechanical coupling of both, and the coil hobbin and the pendulum should be assembled inexpensively and easily without damaging the coil. You can Further, since the terminal tongue for coil terminal processing is integrally molded on the coil bobbin and the coil terminal is wound around the terminal tongue, there is no need for a separate circuit board for fixing the terminal tongue,
The number of parts and the assembly work can be simplified by this amount.

[Brief description of drawings]

FIG. 1 is a view showing a cross section of an embodiment of a coil bobbin.

FIG. 2 is a diagram illustrating a Toruca coil formed by integrally joining a coil to a coil bobbin.

FIG. 3 is a view showing a state in which a Toruca coil is joined to a pendulum and assembled.

FIG. 4 is a diagram illustrating a conventional example of a servo type accelerometer.

FIG. 5 is a diagram illustrating a conventional example of a Toruca coil.

FIG. 6 is a diagram illustrating another conventional example of the Toruca coil.

FIG. 7 is a diagram illustrating a conventional example in which a Toruca coil is assembled into a pendulum.

FIG. 8 is a diagram illustrating another conventional example in which the Toruca coil is assembled into a pendulum.

[Explanation of symbols]

10 base 11 magnets 12 ToruCa coil 13 coil bobbin 131 flange 131 'second flange 132 side slit 133 lower slit 134 Bottom 135 flange 136 Low surface slit 14 Pendulum 141 contact part 141 'second contact portion 142 through hole 140 Perimeter of pendulum 143 punching part 15 coils 151 coil terminal 151 'second coil terminal 152 terminal 152 'second terminal portion 16 circuit board 17 electrical terminals 18-terminal tongue 18 'second terminal tongue 182 contact end 182 'second contact end 19 Hinge part 20 light emitting element 21 Photo sensor 22 Servo amplifier 23 Read resistance

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G01P 15/02-15/13 H01F 27/28

Claims (5)

(57) [Claims] 1. In a servo type accelerometer, a coil and a crank shape to which a coil end of the coil is attached.
Servo accelerometer characterized by comprising Torukakoiru made more coil bobbin which is formed integrally with the terminal tongues which are bent by insert molding on. 2. A servo type accelerometer comprising a coil and a terminal tongue for mounting a coil end of the coil.
Coil bobbin that is integrally molded by insert molding
ToruCa coil consisting of
A servo-type accelerometer, comprising: a Toruca coil pendulum assembly that is mechanically coupled . 3. The servo-type accelerometer according to claim 1 or 2, wherein the terminal tongue has one end wound around the coil bobbin, and the other end of the terminal tongue protrudes outward. A servo type accelerometer characterized in that a coil end is attached to a winding end by slightly projecting from the bobbin lower end from the bobbin inner region with the end as a contact end. 4. The servo-type accelerometer according to claim 1, wherein a contact portion corresponding to a contact end portion of the terminal tongue piece is formed on the surface of the pendulum by film formation. Servo type accelerometer. 5. The servo type accelerometer according to claim 1, wherein the lower end of the coil bobbin from which the terminal tongue is projected is provided with an adhesive, and the contact end is positioned at the contact part. A servo-type accelerometer characterized in that the Toruca coil pendulum assembly is configured by holding the Toruca coil in pressure contact with the surface of the pendulum in this state.