JP2581190Y2 - Electronic unit coupling structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a connection structure used for connecting an electronic unit to a main body case. For example, using a sampling oscilloscope is accomplished by coupling a sampling head within the body. Therefore, a coupling mechanism is required. Hereinafter, the present invention will be described using a sampling oscilloscope as an example.

[0002]

2. Description of the Related Art FIG. 4 is a block diagram of a sampling oscilloscope. In the drawing, 1 is a sampling oscilloscope main body, 2a to 2d are sampling heads (electronic units) mounted on the lower part of the main body 1 via a common heat sink 3, and a head 2c is taken out of the main body 1. It is shown. Here, a perspective view of a conventional attachment mechanism of the sampling head 2c including the heat sink 3 to the main body 1 is shown in FIG. 5, and a cross-sectional view taken along the line AA 'of FIG. 5 is shown in FIG.

In FIGS. 4, 5 and 6, reference numeral 2c denotes the above-mentioned sampling head. This head includes a coaxial input connector 4c for microwave, a base 6, a front panel 7, a cover 8, a ceramic substrate 9 mounted on the base 6, a coaxial connector 4c for input and a pattern provided on the substrate 9. It comprises an aerial wiring 10 to be coupled, a connector 11 and the like. Reference numeral 13 denotes an analog board provided on the main body 1, on which a connector 12 to be connected to the connector 11 is provided. Aluminum profile 1 with counterbore hole 15 at the bottom of analog board 13
6 are provided. A counterbore hole 15 provided in an aluminum profile 16 is provided in a base 6 provided in the sampling head 2c.
There are provided pins 14a and 14b to be fitted to the boss. 1
8 is a mounting screw, 19 and 20 are chassis. Both ends of the radiator plate 3 are attached to chassis 19 and 20.
The sampling head 2c is mounted on the heat sink 3 so that the pins 14a and 14b are fitted into the counterbored holes 15 provided in the aluminum profile 16 and the connector 11 is connected to the counterbore 12. In this case, the heat radiating plate 3 is provided with a hole 17 and a screw hole 21 provided in the base 6 of the sampling head 2c. The sampling head 2c mounted on the heat radiating plate 3 is provided with a mounting screw. The head 2 c is attached to the heat sink 3 by screwing the screw 18 into the screw hole 21 through the hole 17. Sampling head 2
a, 2b and 2d also have the same configuration as the head 2c, and are respectively attached to the heat sink 3 by the same mechanism.

In such a configuration, a measurement signal of about DC to 10 GHz is input through the input connectors 4a to 4d of the sampling heads 2a to 2d. The measurement signal is input to the board 9 via the aerial wiring 10, and is converted into a signal with a low frequency by a frequency conversion circuit mounted on the board. The converted signal is input to an analog board 13 provided on the main body 1 via connectors 11 and 12 each composed of a plug and a socket, and is converted into a digital signal. This digital signal is displayed on a CRT display circuit 5 via a signal processing circuit (not shown) provided in the main body 1.

By the way, the sampling heads 2a to 2
As the form of the input portion d, there are various forms such as those replaced with extension cables in addition to the coaxial connectors 4a to 4d as shown in FIGS. Therefore, it is desirable that the sampling heads 2a to 2d have a structure that can be easily attached to and detached from the main body 1 by a user. However, in the conventional structure shown in FIGS.
When the a to 2d are connected to the main body 1, the pins 14a and 14b pressed into the base 6 are connected to the analog board 13
A guide (not shown) guides to fit into a counterbore hole 15 formed in a profile 16 attached to the lower front surface of the connector, and the pins 11a and 14b and the counterbore hole 15 serve as guides so that the connectors 11 and 12 are completely formed. Insertion is performed until it is fitted and connected. On the other hand, each of the sampling heads 2a to 2d has to transmit heat generated by high-frequency signal processing to the chassis 19, 20 of the main body 1 to radiate heat. Therefore, both ends of the radiator plate 3 are fixed to the chassis 19 and 20 as shown in FIG.
By connecting the bases 6 of the heads 2a to 2d with the screws 18, the heads 2a to 2d and the chassis 19, 2
It has been practiced to thermally couple 0 and 0.

However, in the conventional mounting mechanism having such a configuration, after the sampling heads 2a to 2d are inserted, these heads are attached to the heat sink 3 by screws 18 from a lower direction perpendicular to the insertion direction. Since it is configured to be fixed, the looseness between the screw 18 and the escape hole 17 of the screw may cause incomplete insertion of the connectors 11 and 12 and may cause poor contact. When the relative position between the connectors 11 and 12 and the heat sink 3 is shifted due to the dimensional tolerance of each part, the connector 1
There is a possibility that a stress may occur in 1 and 12 and cause a failure. In order to prevent this, the dimensional accuracy of the parts must be increased more than necessary, which increases the cost. Since the screw 18 for fixing the sampling heads 2a to 2d to the heat radiating plate 3 is upward, it is necessary to insert a finger into the bottom of the device and turn the screw 18, which poses a problem in operability.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to eliminate the above-mentioned problems (1) to (3), and the purpose is to achieve a stable electrical connection state and a stable heat radiation state by easily attaching and detaching operations. It is an object of the present invention to provide a combined structure of electronic units.

[0008]

According to the present invention, a metal base having a notch at one end and a step at the other end is provided at the bottom thereof, and an input terminal is provided at the notch of the base. An electronic unit having a connector on the stepped side, a heat sink disposed in a main body case in which the electronic unit is mounted, and having positioning pins implanted at predetermined intervals, A U-shaped frame having a joint portion, a screw having an E-ring penetrating both sides of the frame, a block of metal material screwed to the screw in the U-shaped frame, and the U-shaped frame A stopper which is formed of a spring mounted on the screw between one side surface of the frame and the block, and which is attached to the heat radiating plate, has a connector having a spring characteristic at one end of the stopper, which is in contact with the connector of the electronic unit. Book attached A circuit board fixedly arranged in the case, a stopper made of a metal plate attached via a stud between the heat sink and the circuit board, and a comb-like base having a base portion attached to the stopper and having a convex portion The electronic unit is inserted into the body case from the connector side, and the step formed on the base is inserted from the convex portion of the leaf spring and abuts against the leaf spring. The electronic unit is connected to the main body case by rotating the screw so that the engaging portion of the U-shaped frame of the stopper is engaged with the notch of the base of the electronic unit. Structure of the electronic unit configured to perform.
It is configured to be connected.

[0009]

According to the present invention, the connecting screw is operated from the front of the main body case. By inserting the head from the protruding portion of the leaf spring to the stopper with these screws, the force for insertion is divided into two directions, one for pushing the head into the main body and the other for pushing against the heat sink.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an example in which a sampling oscilloscope shown in FIG. FIG. 1 is an exploded perspective view of an embodiment of a main part of the present invention, FIG. 2 is a structural view showing a part of a main part of the present invention in cross section, and FIG. 3 is a structural view of a stopper used in the present invention. is there. 1 to 3, reference numeral 2c denotes a sampling head, 3 denotes a radiator plate made of a material having high thermal conductivity such as a copper plate, and 4 denotes an input connector. A metal base 2 is provided on the bottom surface of the head 2c.
1 is attached. A cutout portion 22 is formed on the front side (input connector 4 side) of the base, and a step portion 23 is formed on the rear portion over the entire width of the base. Reference numeral 41 denotes a pedestal of the input connector 4. The pedestal is screwed to a front panel 42 of the head 2 c so that the input connector 4 can be attached to the head 2 c. A ceramic substrate (not shown) is provided inside the head 2c as in the conventional example, and a case 24 is placed thereon. Reference numeral 25 denotes a connector provided at the rear of the head 2c. A plurality of positioning pins 31 are implanted on the heat radiating plate 3 at predetermined intervals (corresponding to the width of the head 2c). Reference numeral 5 denotes a circuit board, and a connector 51 connected to the connector 25 formed on the head 2 is provided at an end of the circuit board. This connector 51 is configured as a contact type in which a contact portion is biased by a spring,
Variations in the dimensional tolerances of the component parts can be absorbed. Reference numeral 61 denotes an elongated plate-like stopper disposed on the heat sink 3, and reference numeral 62 denotes a plurality of cylindrical studs. The studs 62 are implanted at predetermined intervals in the stopper 61. The height (thickness) of the stopper 61 is the head 2
The height is slightly lower than the height of the step portion 23 formed in c. Reference numeral 63 denotes a leaf spring formed in the shape of a comb tooth, which is attached to the stopper 61 such that the stud 62 is located in the concave portion thereof, and the convex portion (free end side) is bent obliquely upward. The circuit board 5 and the heat sink 3 are fixed via a stud 62 and a stopper 61.
7 is a stopper, a U-shaped frame 71 made of a metal material,
A screw 73 loosely fitted on both side surfaces 71a and 71b of the frame 71 and stopped by an E-ring 72, and a substantially cross-shaped metal block 74
And a spring 75. Side 71a of frame 71
Has an inwardly bent triangular engagement portion 71c
Are formed. This engaging portion 71c is
Is engaged with the notch portion 22 formed at the bottom. A screw hole 74a is provided through the center of the block 74,
The screw 73 is screwed into the screw hole. The spring 75 is mounted on the screw 73 between the block 74 and the side surface 71a of the frame 71. The side surface 71 a of the frame 71 is pressed against the head 73 a of the screw 73 by the spring 75. In such a stopper 7, the arms 74b and 74c of the block 74 are attached to the heat sink 3 by screws. In this case, the triangular portion 71c of the side surface 71a of the frame 71 is engaged with the notch 22 formed in the base 21 of the head 2. The number of the stoppers 7 having such a configuration is provided on the heat radiating plate 3 as many as the number of the stoppers 7 coupled to the main body 1. The heat sink 3 is a plate-shaped stud 32
On both sides and the side frames 19, 2
Connected to 0. Reference numeral 1a denotes a cover of the main body 1, and a hole 1b is formed in a portion of the screw 73 constituting the stopper 7 which faces the head 73a.

The operation of the apparatus of the present invention having the head mounting mechanism having such a configuration will be described as follows. In connecting the sampling head 2c to the main body 1, the head 2c is slid over the heat sink 3 and pushed into the main body 1 along a guide (not shown) of the cover 1. Then, the step 23 of the base 21 of the head 2 c is guided by the positioning pin 31, and the step 23 comes into contact with the bent portion of the leaf spring 63 and stops. On the other hand, when the screw 73 of the stopper 7 is rotated to the left (counterclockwise direction), the friction between the head 73 a of the screw 73 and the side surface 71 a of the frame 71 due to the load of the spring 75 causes the frame 71 to move together with the screw 73 to the left. When the engaging portion 71c of the side surface 71a falls below the upper surface of the heat sink 3, it hits the bottom surface of the block 74 and stops. When the screw 73 is rotated to the right (clockwise), the frame 71 engages the engaging portion 71 c of the side surface 71 a with the heat sink 3.
Rises above the upper surface of the block 74 and when it is perpendicular to the heat sink 3, it hits the bottom surface of the block 74 and stops. In this way, by rotating the screw 73, the frame 71 constituting the stopper 7 rotates 90 degrees around the screw 73. This rotation operation can be performed from the front surface of the case 1 by rotating the head 73a of the screw 73 with a screwdriver (not shown). As described above, when the head 2c is pushed into the main body 1, the step 2 of the base 21 is guided by the pins 31 and stops in contact with the leaf spring 63.
In this inserted state, the screw 73 of the stopper 7 is rotated in advance to the left. By rotating to the left, the engaging portion 71c of the frame 71 is lower than the upper surface of the heat sink 3,
The head 2 can be smoothly pushed into the main body 1.
When the head 2c comes into contact with the leaf spring 63 and stops, the screw 73 that has been previously rotated to the left is tightened to the right. Then,
The engaging portion 71c of the frame 71 is engaged with the notch 22 of the head 2c. When the screw 73 is further tightened in this state, the force for tightening the screw 73 is such that the force for pushing the head 2 c into the main body 1 and the tip 71 c bent inward contact the notch 22. And the step 23 is a leaf spring 63
In the direction of pressing against the heat sink 3 by contact with
Divided into directions. Finally, the head 2 c is positioned by the pins 31 implanted in the heat sink 3, and stops at the position where the step 23 hits the stopper 61. In this case, when the head 2c is pushed in, the contact portion between the connector 25 of the head 2c and the connector 52 of the circuit board 5 of the main body 1 comes into opposing contact against the bias of the spring. The thermal connection is made between the base 21 of the head 2c and the radiator plate 3.
Is realized by full contact with To remove the head 2c from the main body 1, turn the screw 73 to the left to turn the frame 7
The engagement between the first engaging portion 71c and the notch 22 of the head 2c is released. When the engagement is released, the frame 71 rotates, and the engagement portion 71c is located below the heat sink 3. This allows
The head 2c can be easily removed from the main body 1.

In the above-described embodiment, the sampling
Although the connection structure of the sampling head in the oscilloscope has been described, the present invention can be applied as a connection structure of various electronic units detachable from the main body.

[0013]

According to the present invention, the following effects can be obtained. With one screw, the electronic unit and the main body can be mechanically and thermally connected in a stable state. Since the operation part of the screw is provided so as to protrude from the front surface of the main body, the operation of attaching and detaching the electronic unit can be easily performed. As a connector for performing electrical connection, a connector having a structure in which a contact portion is urged by a spring is used, so that stress is not applied to the connector and a stable contact state can be obtained. There is no need for dimensional accuracy beyond necessity, and the electronic unit can be compact and an inexpensive mounting structure that does not cost much can be obtained.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an embodiment of a main part of a mounting structure according to the present invention.

FIG. 2 is a side view showing a part of a main part of the mounting structure according to the present invention in a cross section.

FIG. 3 is a configuration diagram of a stopper used in the mounting structure according to the present invention.

FIG. 4 is a configuration diagram of a sampling oscilloscope.

FIG. 5 is an exploded perspective view of an example of a main part of a conventional mounting structure.

FIG. 6 is a sectional view taken along line A-A ′ of FIG. 5;

[Explanation of symbols]

 2c Electronic unit 21 Base 22 Notch 23 Step 3 Heat sink 5 Circuit board 25, 51 Connector 7 Stopper 71 Frame 71c Engaging part 72 E-ring 73 Screw 74 Block

Claims (1)

(57) [Scope of request for utility model registration] 1. A base made of a metal material having a notch formed at one end and a step formed at the other end, an input terminal at the notch side of the base, and a connector at the step. An electronic unit having: a radiating plate disposed in a main body case in which the electronic unit is mounted and having positioning pins implanted at predetermined intervals; and a U-shaped having an engaging portion on one side surface. A frame, a screw having an E-ring penetrating both sides of the frame, a block of metal material screwed to the screw in the U-shaped frame, and one side of the U-shaped frame and the block A stopper comprising a spring mounted on the screw and attached to the radiator plate; a connector having a spring characteristic attached to one end of the stopper to face the connector of the electronic unit and fixed in the main body case Placed A circuit board, a stopper made of a metal plate attached via a stud between the heat sink and the circuit board, and a comb-shaped stopper whose base is attached to the stopper and whose convex side is bent upward. A leaf spring, wherein the electronic unit is inserted into the body case from the connector side, and a step formed on the base is pushed from the projection of the leaf spring until it comes into contact with the leaf spring. A coupling structure of an electronic unit configured to couple the electronic unit into the main body case by rotating the screw so as to engage the engaging portion of the character-shaped frame with the notch of the base of the electronic unit. .