JPH04122316U - Fluxgate type magnetic direction detection device - Google Patents

Abstract

(57) [Summary] [Purpose] To increase productivity by simplifying the assembly of the sensor support stand. [Construction] Case 1 constructed by joining upper and lower cases 6 and 7
A step part 11 is provided on the inner periphery of the lower case 6 of the fluxgate type magnetic direction detecting device, which has a sensor support stand 3 built into it.The sensor support stand 3 is brought into contact with this step part 11, and is provided with a vertical wall having a length that comes into contact with the sensor support base 3 and protrudes inside the case, and when the upper and lower cases 6 and 7 are joined, the sensor support base 3 is pressed and held between the step portion 11 and the vertical wall 7b. I did it like that.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention is based on a fluxgate-type magnetic flux gate, which is mainly used as a direction indicator for ships. The present invention relates to a direction detection device.

0002

[Conventional technology]

The above magnetic direction detection device generally has sensors inside a hollow structure case. It has a structure that incorporates a sensor support stand and a circuit board that can be freely swung to the right. ing. In such magnetic direction detection devices, sensor support has traditionally been used. The stand was fixed inside the case with screws.

0003 Also, the sensor and the circuit on the circuit board are connected with soldered lead wires. there was.

0004

[Problem that the idea aims to solve]

According to the above conventional structure, in order to assemble the sensor support into the case, there are multiple locations. In addition to requiring a screw fixing process, wiring connection also requires time and effort, resulting in low productivity. It had become a thing.

[0005] The present invention was made in view of these problems, and it makes the case structure more effective. By using this product, it is possible to simplify the assembly of interior parts, thereby increasing productivity. This is an attempt to reduce costs.

[0006]

[Means to solve the problem]

In order to achieve the above purpose, the present invention is constructed by joining a lower case and an upper case. There is a flat panel case with a sensor support stand for suspending and supporting the sensor. It is a crossgate type magnetic direction detection device, and one case has a sensor support stand in contact with it. A stepped section is provided along the inner circumference of the case, and the other case has a stepped section along the inner circumference of the case. A protruding portion having a length that protrudes from the sensor support and comes into contact with the sensor support is provided. A fluxgate type magnetic direction detection device was constructed from the above components.

[0007] Alternatively, in addition to the above configuration, the upper case may be connected to the outside by penetrating the inside and outside of the case. A receptacle for connection is screwed to the inner end of the case. The circuit board is connected and fixed, and one connector is installed vertically on the back of the board. and a connector opposite to the one connector on the surface of the sensor support base. a connector is erected, and the other connector is connected to the sensor, A fluxgate type magnetic direction detection device was constructed from the above items.

[0008]

[Effect]

According to the basic characteristic configuration of the present invention, the sensor support base with the sensor attached is connected to the upper and lower cases. When these cases are connected after being loaded into the It is pressed and clamped from above and below by the parts to be fixed within the case.

[0009] In this case, if the configuration of claim 2 is added, the sensor can be connected at the same time as the upper and lower cases are joined. Connectors are also used for electrical connections between the circuit board and receptacles for external connections. It will be done through.

0010

【Example】

FIG. 1 shows the overall appearance of an apparatus according to an embodiment of the present invention, and FIG. 2 shows its longitudinal cross-sectional view. A cross-sectional view thereof is shown in FIG.

[0011] This fluxgate type magnetic direction detection device consists of a resin case 1 with a sealed hollow structure. The sensor 2, sensor support stand 3, and circuit board 4 are incorporated inside the case. The structure has output and power supply receptacles 5a, 5b, and 5c protruding from the top surface of the base. It has become.

0012 The case 1 made of resin includes a box-shaped lower case 6 and an upper case that is sealed and attached to the upper end of the box-shaped lower case 6. It consists of 7 bases. The lower case 6 includes a rectangular case part 6a and a lower part of the rectangular case part 6a. A hemispherical dome part 6b and an installation part vertically installed on the outer periphery of the rectangular case part 6a. It consists of a hakama part 6c. Also, on the four sides of the upper case 7, there is a hakama part 6c of the lower case 6. A peripheral wall 7a is provided which fits over the top of the holder. Then, a protrusion was provided on the outer surface of the hakama part 6c. The connecting pawl 8 is elastically engaged with a recess 9 formed on the inner surface of the peripheral wall 7a of the upper case 7, and the upper The lower cases 6 and 7 are connected in a snub-fit manner.

[0013] The sensor support stand 3 is provided inside the lower case 6. i.e. sensor support The stand 3 is fitted into the case part 6a of the lower case 6 and is received at the bottom part 11 of the case part 6a. (In this embodiment, this bottom portion 11 corresponds to the stepped portion in the claims.) ). Vertical walls 3a are provided on the four sides of the sensor support stand 3. On the other hand, on A vertical wall 7b is vertically installed on the ceiling surface of the case 7 at a position opposite to the above-mentioned vertical wall 3a. This vertical wall 7b has a length such that it comes into contact with the above-described vertical wall 3a. (This implementation In the example, this vertical wall 7b corresponds to the protrusion in the claims). and, By joining the upper and lower cases 7 and 6, the sensor support stand 3 is attached to the lower end of the vertical wall 7b. and the bottom part 11, and the sensor support stand 3 is fixed inside the case 1. It is.

[0014] Further, the sensor support stand 3 has a connecting bracket 19 protruding from the center of its lower surface. Ru. The sensor 2 is attached to this connection bracket 19. Sensor 2 is below The sensor coil 14 is installed inside the sensor case 13 that is open to the side, and the sensor The lower end opening of the support case 13 is closed with a cover plate 15, as shown in FIG. The connecting piece 15a provided on the cover plate 15 is connected to the outer surface of the sensor case 13 so that It is adapted to be engaged and connected to the eye 16 in a snap-fit manner. And this A connecting arm 17 provided on the upper end of the sensor case 13 and a universal pin 1 8, it is suspended and supported by a connecting bracket 19 so as to be swingable back and forth and left and right. Ru.

[0015] The circuit board 4 has external connection receptacles 5a, 5b, and 5c soldered on its top surface. It is attached and fixed, and the wiring pattern (not shown) of the circuit board 4 and each receptacle are 5a, 5b, and 5c are connected. Receptacles 5a, 5b, 5c are upper case It protrudes from the upper surface of the upper case through a through hole 23 formed in the case 7. These protrusions Nuts 24 are attached to the receptacles 5a, 5b, and 5c. Each receptacle 5a, 5b, 5c and circuit board 4 are fixed inside the upper case 7. It is. The gaps between the receptacles 5a, 5b, 5c and the through hole 23 are sealed. It is sealed with a ring 25. Then, the circuit board 4 is connected to the upper case 7 and the lower case 6. Then, it is received by the vertical wall 3a of the sensor support stand 3.

[0016] The connection between the sensor 2 and the circuit board 4 is as follows. i.e. sensor A lead wire (not shown) from the sensor coil 14 is connected to the center of the upper end surface of the case 13. An opening 20 is formed that leads out to the side. In addition, a male shape is provided on the top surface of the sensor support base 3. The connector 21 is attached, and the connector pin 21a of this connector 21 is connected to the center. It protrudes below the support base 3. The sensor coil 14 is led through the opening 20. Each lead wire taken out is connected to this connector pin 21a.

[0017] On the other hand, a female connector is provided on the lower surface of the circuit board 4 at a position opposite to the male connector 21. 22 is installed vertically. Therefore, when the upper and lower cases 7 and 6 are joined, both The connectors 21 and 22 are naturally connected and connect the sensor coil 14 and the circuit board 4. The wiring pattern and thus each receptacle 5a, 5b, 5c are electrically connected. .

[0018] By the way, in the flux gate magnetic direction detection device of this embodiment, the case In order to electromagnetically shield the inside of the device, it has the following structure. In other words, the lower A metal film A is formed on the entire inner surface S1 of the case 6 and the entire inner surface S2 of the upper case 7. has been completed. A ring-shaped pad is attached to the sealing part between the lower case 6 and the upper case 7. A packing 10 is interposed therein, and this packing 10 is made of a conductive rubber material. It is.

[0019] Therefore, the metal film A on the lower case 6 side and the metal film A on the upper case 7 side are the packing. 10, and the inner space of the case 1 is surrounded by a series of metal films A. become. Therefore, the entire case 1 is electromagnetically shielded, and external electromagnetic It will be completely shielded from waves.

[0020] Furthermore, in this type of device, the power supply section, that is, the power supply receptacle 5 Electromagnetic waves are also generated from around c. Therefore, in this example, the following This shields electromagnetic waves generated from the power supply. In other words, the top of upper case 7 An annular rib 7c protruding toward the inside of the case is provided on the surface. The annular rib 7c is The annular rib is provided at a position surrounding the power supply receptacle 5c. A packing 26 made of conductive rubber is fitted into the tip of 7c. and, The inner surface of this annular rib 7c and the ceiling of the upper case 7 surrounded by the annular rib 7c The entire surface is covered with the metal film A, similar to the metal film A described above.

[0021] Therefore, the circuit board 4 is assembled inside the upper case 7 having such an annular rib 7c. When inserted, the circuit board 4 comes into pressure contact with the packing 26, and the power supply receptacle 5c and its The surface of the circuit board 4 around the circuit board 4 is sealed by the annular rib 7c and isolated from the outside. It turns out. Further, the surface of the circuit board 4 that the packing 26 comes into contact with is A base pattern (not shown) is formed, which allows the gold in the annular rib 7c to The metal film A is connected to the ground pattern of the circuit board 4.

[0022] Therefore, the surface of the power supply receptacle 5c and the circuit board 4 around it is grounded. The metal film A connected to the pattern will double seal the power supply unit. Electromagnetic waves generated around the receptacle 5c are shielded and leaked to the outside of the annular rib 7c. It will not leak.

[0023] Note that a ground terminal screw 27 connected to the ground pattern is connected to the circuit board 4. It is installed upright on the board 4, and is connected to the ground externally by this ground terminal screw 27. It is designed to be

[0024]

[Effect of the idea]

As is clear from the above explanation, according to the present invention, the sensor support stand and the circuit board There is no longer any need for screws, adhesives, etc. to assemble and fix the board into the case. Therefore, it has become possible to improve productivity and reduce costs.

[0025] In particular, the sensor and circuit board can be connected at the same time by using a connector to connect the upper and lower cases. Even more so when configured to allow electrical connection with external connection receptacles. Not only does it increase productivity, but it also reduces the risk of wiring damage or disconnection during assembly. is eliminated, and quality maintenance performance is dramatically improved.

[Brief explanation of drawings]

FIG. 1 is an overall external view of an embodiment of the present invention.

FIG. 2 is a longitudinal cross-sectional view of the embodiment.

FIG. 3 is a cross-sectional view of the embodiment.

FIG. 4 is an exploded perspective view showing the lower case and sensor support base of the embodiment.

FIG. 5 is an exploded cross-sectional view showing the overall concept of the embodiment.

FIG. 6 is a perspective view of the sensor of the example.

[Explanation of symbols]

1 case 2 sensor 3 Sensor support stand 4 Circuit board 5a, 5b, 5c receptacle 6 Lower case 7 Upper case 7b Bottom (stepped part) 11 Vertical wall (projection) 21 Connector on the sensor support stand side 22 Connector on the circuit board side

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[Procedural amendment]

[Submission date] December 16, 1991

[Procedural amendment 1]

[Name of document to be corrected] Drawing

[Correction target item name] Figure 2

[Correction method] Change

[Correction details]

[Figure 2]

──────────────────────────────────────────────── ─── Continuation of front page (72) Creator Junichi Ishihara Furuno Electric Co., Ltd. 9-52 Ashihara-cho, Nishinomiya City, Hyogo Prefecture Inside the ceremony company

Claims (2)

[Scope of utility model registration request] [Claim 1] A sensor (2) is installed inside a case (1) constructed by joining a lower case (6) and an upper case (7).
A fluxgate type magnetic direction detection device incorporating a sensor support stand (3) for suspending and supporting the sensor, wherein one case (6, 7) has a step part (11) on which the sensor support stand (3) comes into contact. is provided along the inner periphery of the case, and the other case (7, 6) is provided with a protrusion (7b) that protrudes inward of the case and has a length that abuts the sensor support (3). A fluxgate type magnetic direction detection device characterized by: [Claim 2] The upper case (7) has receptacles (5a, 5b, 5c) for external connection passing through the inside and outside of the case.
is screwed, and this receptacle (5a, 5
A circuit board (4) is connected and fixed to the inner edge of the case of the case (b, 5c), and one connector (2) is connected to the back of the board.
2) is installed vertically, and another connector (21) is installed upright on the surface of the sensor support stand (3) facing the one connector (22). ) is connected to the sensor (2), the fluxgate type magnetic direction detecting device according to claim 1.