JPH06774Y2 - Assembly for inserting a probe into a cylinder with a function to hold an electric component unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an assembly for inserting a tubular body of a probe having an electric component unit holding function.

(Prior Art) A stylus portion is attached to the tip of the cylindrical body through an insulating material. From this rear end opening of the cylindrical body, the assembly in which the electric component unit and the connecting portion of the coaxial cable are connected is inserted. The lead itself protruding from the electric component may be located at the tip of the assembly in the fitting direction, or the split groove side end of the spring-like engagement element with the split groove attached to this lead end is located. Sometimes.

A receiving groove is formed at the inner end of the stylus portion, and a through hole used for soldering is formed in the side surface of the contacting groove so as to communicate with the receiving groove. The assembly is inserted into the cylindrical body, the tips of the leads or the engaging elements are inserted into the receiving grooves, and the solder is poured into the through holes to fix the leads or the engaging elements to the stylus portion. With this, the electric component unit is in a state of being installed between the stylus portion and the connection portion.

(Problems to be solved by the invention) The thickness of the leads on both sides of the electric component is about 0.4 mm, which is very thin, and the probe may be used by hitting the subject under vibration or by the user riding on a vibration body. If you use a probe, the electric component unit will easily vibrate. When the electric component unit vibrates, noise is generated and the waveform of the oscilloscope is disturbed, so that the waveform cannot be accurately measured.

(Means for Solving the Problems) A fitting assembly according to the present invention is provided with a stylus portion, a connecting portion of a coaxial cable, and the stylus portion and the connecting portion on a coaxial line and by its own frame portion. It has a frame that is integrally provided with a space therebetween, and an electric component unit that is connected between the stylus portion and the connection portion. The holding piece is provided on the inner surface of the frame portion so as to face the cross section thereof. And a projection protruding outwardly from the inner diameter of the cylindrical body into which the frame is fitted is formed on the outer surface thereof in association with at least one holding piece.

A circle in which this frame has a frame portion that holds a space, a holding portion for the stylus portion at one end and a holding portion for the connecting portion at the other end, and both holding portions are fitted to the inner diameter of the tubular body. It may be columnar.

Further, the frame portions may be parallel plates facing each other, and the intermediate portions of these plates may be connected by an arc-shaped plate.

Further, the frame portion may be a hollow cylindrical body having a cutout portion.

In addition, the inner diameter of the tubular body is set such that the portion where the holding portion of the connecting portion of the frame fits is larger than the portion where the holding portion of the stylus portion fits, and both portions are separated by the step surface. Continuously,
The stepped surface formed between the outer surface of the holding portion of the connecting portion of the frame and the outer surface of the frame portion may be brought into contact with this stepped surface to determine the fitting position between the tubular body and the frame.

Further, both the holding pieces may be inclined in the same direction with respect to the frame portion.

(Operation) The stylus portion and the connection portion of the coaxial cable are arranged on the same axis line with a space therebetween, and both of them are integrated by the frame. This integration is preferably performed by molding the frame in terms of workability and stability of integration, but separately manufactured products may be integrated by adhesion or the like. The electric component unit is connected between the stylus portion and the connecting portion by welding, soldering, or the like. This electrical component unit
As usual, it consists of capacitors and resistors.

The assembly thus constructed is inserted into the cylinder through the opening at one end thereof, with the stylus portion first. Then, when the stylus portion protrudes outward from the other end of the tubular body, the outer surface of the tubular body is caulked toward the center thereof to bite into the outer surface of the assembly, and both are fixed.

When this assembly is inserted into the cylinder, the projection on the outer surface of the frame hits the inner wall surface of the cylinder and is pressed, so that the diameter of the frame is reduced. Therefore, the distance between the pair of holding pieces on the inner surface of the frame is narrowed, and the electric component unit is tightly held between the end surfaces of both pieces.

After that, this cylindrical body is housed in the outer cover as usual, and the connecting portion is connected to the coaxial cable for use. Connect another stylus to the tip of the stylus and cover them with a movable sleeve that can move back and forth with respect to the outer sheath. It can also be used by advancing to.

A circle in which this frame has a holding portion for the stylus portion at one end of the frame portion and a holding portion for the connecting portion at the other end, and both holding portions are fitted to the inner diameter of the tubular body. With the columnar shape, both holding portions are tightly fitted to the cylindrical body.

Further, when the frame portions are parallel plates facing each other, the amount of material used is reduced, the weight is reduced, and the selection of the direction of the guiding work between the terminals of the electric component unit and the stylus portion or the connecting portion becomes wider. .

Also, if the middle part of these plates is connected by an arc-shaped plate, the plates will maintain a predetermined relational position with the arc-shaped plates and have sufficient strength.
There is no problem in storing the electric component unit.

Also, if this frame part is made into a cut-out cylindrical body with a cutout part, the work of connecting the terminal of the electric component unit and the stylus part or the connection part can be done from the outside through this cutout part, and the strength is sufficient, If you do, it will fit well.

Further, the inner diameter of the tubular body is made smaller at a portion where the holding portion of the stylus portion is fitted than at a portion where the holding portion of the connecting portion of the frame is fitted, and both portions are separated by a step surface. If the stepped surface formed between the outer surface of the holding portion of the connecting portion of the frame and the outer surface of the frame portion is brought into contact with this stepped surface to determine the fitting position of the tubular body and the frame, When the three-dimensional body is inserted into the tubular body and the two step surfaces come into contact with each other, the solid body does not move any further, and the fitting position is automatically determined.

If both holding pieces are tilted in the same direction with respect to the frame, a part of the excessive clamping force of the electric component unit by the holding pieces escapes as a component force in a direction parallel to the unit, so that the unit is damaged. There is no fear of doing anything.

(Example) 1 is a stylus part, 2 is a connection part of the coaxial cable 3, 4 is a frame, and 5 is an electric component unit. In the frame 4, the stylus portion 1 and the connecting portion 2 are integrally installed on the coaxial line and at their own frame portions 6 with a space therebetween. The electric component unit 5 has a capacitor and a resistor. One terminal 7 of the unit 5 is connected to the stylus portion 1 by welding or the like, and the other terminal 8 is also connected to the connection portion 2 in the same manner. It

On the inner surface of the frame portion 6 of the frame 4, holding pieces 9 and 10 are provided so as to face each other on the cross section. And this frame 4
A projection 11 is formed on the outer surface of at least one of the holding pieces, for example, 9 on its extension line. The outer end of the protrusion 11 projects outward from the inner diameter of the cylindrical body 12. Therefore, when the frame portion 6 is fitted into the tubular body 12, the tubular body 1
The projection 11 is pressed by the inner wall surface of the second holding piece 9 and the holding pieces 9 and 10 are pressed.
And the electric component unit 5 is held tightly.

The assembly constructed in this way is made of a metal cylinder 12
It is fitted into the cylindrical body from the opening at one end thereof and fixed to the cylindrical body by caulking or the like. The tubular body 12 is housed in the outer jacket 13. 1
Reference numeral 4 denotes an oscillating push button provided on the outer jacket 13, and reference numeral 15 denotes a contact bullet for detecting the zero potential of the oscilloscope, the proximal end of which is fixed to the cylindrical body 12 and the free end of which is in contact with the push button 14. The swing end of the push button 14 causes the free end of the bullet 15 to move to the window 1 of the cylindrical body 12.
It comes into contact with the connecting portion 2 supported by the frame 4 and the retaining ring 4'through 6 to form a ground circuit. Reference numeral 17 is a mounting hole for connecting the base end portion of an earth clip (not shown) to the cylindrical body 12, and 18 is another stylus portion screwed to the tip of the stylus portion 1, which moves forward and backward with respect to the outer sheath 13. It is covered by a movable jacket 20 which is free and tends to move away from the jacket 13 by a spring 19.

In use, the stylus portion 1 is directly applied to the object to be measured. If there is a movable handle 20, a finger is put on the outer handle 21 and pulled back in the direction of the outer cover 13, the stylus portion 18 is relatively advanced outward, and is applied to the object to be measured. The signal taken out from the stylus portion 1 is sent to the oscilloscope through the electric component unit 5, the connecting portion 2, the connecting pin 22, and the central conductor 23. In addition, the signal extracted from the stylus portion 12 is
It is sent to the oscilloscope through the stylus portion 1, the electric component unit 5, the connecting portion 2, the connecting pin 22, and the central conductor 23.

The frame 4 has a holding portion 31 for the stylus portion 1 at one end of the frame portion 6 and a holding portion 32 for the connecting portion 2 at the other end. Each of the holding portions 31 and 32 has a cylindrical shape that fits into the inner diameter of the cylindrical body 12. With this cylindrical configuration, the holding portions 31 and 32 are tightly fitted to the predetermined inner wall surface of the tubular body 12, and the assembly is stably housed in the tubular body 12. A groove 32 ′ that engages with a protrusion (not shown) on the inner wall surface of the cylindrical body 12 and prevents the holding portion 32 from rotating can be provided on the outer peripheral surface of the holding portion 32.

The frame portion 6 of the frame 4 is defined as parallel plates 35 and 36 facing each other. The arcuate plates 337 connect the middle portions of these plates.
Since at least two spaces are formed between the plates 35 and 36, the terminals 7, 8 of the electric component unit 5 and the stylus portion 1,
Welding with the connection 2 can take place through any of the intervals. The arc-shaped plate 37 prevents the frame portion 6 from being slightly weakened. In this case, even if the electric component unit 5 is housed between the plates 35 and 36, the arc-shaped plate 37 avoids this, so that there is no hindrance to the housing.

The inner diameter of the cylindrical body 12 is equal to the holding portion 31 of the stylus portion 1 of the frame 4.
The portion 41 into which the connecting portion 2 is fitted is smaller than the portion 42 into which the holding portion 32 of the connecting portion 2 is fitted.
Continue at 3 onwards. A step surface 38 is also formed on the outer surface of the frame 4 at the boundary between the holding portion 32 of the connecting portion and the frame portion 6. When the frame 4 is fitted into the tubular body 12, the step surface 38 comes into contact with the step surface 43, so that the frame 4 cannot be inserted any more and the positions of both are determined.

The frame portion 6 of the frame 4 is a hollow cylindrical body 34 having a cutout portion 33. Terminal 7 of electric component unit 5, stylus portion 1, terminal 8
The welding between the connecting portion 2 and the connecting portion 2 is performed through the cutout portion 33. Thus, the electric component unit 5 is housed in the hollow cylindrical body 34.

FIG. 8 shows a case where the holding pieces 9 and 10 are inclined in the same direction with respect to the frame portion 6. This direction is preferably the fitting direction of the assembly. The holding pieces 9 and 10 approach each other to hold the electric component unit 5, but when the holding force becomes excessive, both holding pieces are prevented from further tilting or bending and damaging the electric component unit 5.

(Effect of the Invention) According to claim 1 of the present invention, the connecting portion of the stylus portion and the coaxial cable is provided on the inner surface of the frame portion of the frame integrally opposed to each other on the same axis line with a space therebetween. Since the holding pieces are provided opposite to each other and a protrusion protruding outward from the inner diameter of the tubular body is formed on the outer surface thereof in association with at least one of the holding pieces, the stylus is fitted by fitting the frame to the tubular body. The electric component unit installed between the connection part and the connection part can be tightly clamped by the holding piece, and the vibration of the electric component unit can be prevented even if the probe is shaken, so no noise is generated and thus the waveform on the oscilloscope is changed. Disturbance can be prevented and accurate waveform measurement can be performed.

Further, according to claim 2, since the frame is fitted into the cylindrical body by the holding portion of the cylindrical stylus portion and the holding portion of the connecting portion, respectively,
The stylus portion, the connecting portion, and the electric component unit can be housed on the axis of the tubular body, and good electrical characteristics can be maintained.

Further, according to claims 3 and 4, the frame portion can be made lighter and cheaper, a plurality of welding work spaces for the electric component unit can be provided, and accordingly, the work can be performed while keeping the optimum space, and the strength is The arc-shaped plate provides sufficient assurance, and a sufficient space for accommodating the electric component unit can be secured.

Further, according to claim 5, the structure of the frame portion is simple, the strength is sufficient, and the electric component unit can be stored well.

Further, according to claim 6, when the assembly is fitted into the cylindrical body,
If the stepped portion between the two holding portions of the frame is pushed until it comes into contact with the stepped portion of the inner wall surface of the cylinder, the two can be fitted at a predetermined position, so that the work can be extremely simple.

Further, according to claim 7, it is possible to prevent the electric component unit from being excessively pinched by both holding pieces.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a probe to which an assembly according to the present invention is applied, FIG. 2 is a partially cutaway side view showing the electrical component unit of the assembly, and FIG. 3 is that of FIG. Left side view,
4 is a sectional view taken along line 4-4 of FIG. 2, and FIG. 5 is 5 of FIG.
5 is a sectional view taken along line 5, FIG. 6 is a right side view of FIG. 2, FIG. 7 is a bottom view of FIG. 2, and FIG. 8 is a perspective view of another aspect of the assembly,
FIG. 9 is a diagram showing a mode of the holding piece. DESCRIPTION OF SYMBOLS 1 ... Stylus part, 2 ... Connection part, 3 ... Coaxial cable, 4 ... Frame, 5 ... Electric component unit, 6 ... Frame part, 7, 8 ... Terminal, 9, 10 ... Holding piece, 11 ... Protrusion, 12 ... Cylinder, 13
... Coats, 31, 32 ... Holding parts, 35, 36 ... Plates, 37 ...
Arc-shaped plate, 38 ... stepped surface, 33 ... notched portion, 34 ... notched cylindrical body,
41, 42 ... part, 43 ... step surface.

Claims (7)

[Scope of utility model registration request] 1. A connecting portion between a stylus portion (1) and a coaxial cable (3)
(2), a frame (4) in which the stylus portion (1) and the connecting portion (2) are integrally installed on the coaxial line and at a fixed interval with their own frame portion (6), and It has an electric component unit (5) that is connected between the needle portion (1) and the connecting portion (2), and the holding piece (9) is provided on the inner surface of the frame portion (6) so as to face the cross section thereof. (10) is provided and the outer surface thereof is associated with at least one of the holding pieces and has a protrusion (1) protruding outward from the inner diameter of the cylindrical body (12) with which the frame is fitted.
An assembly for inserting a tubular body of a probe with a function of holding an electric component unit, characterized in that 1) is formed. 2. The frame (4) has a holding part (31) for the stylus part (1) at one end of the frame part (6) and a holding part for the connecting part (2) at the other end. The tubular body inserting assembly for a probe with an electric component unit holding function according to claim 1, further comprising (32), wherein both of the holding portions are cylindrical so as to fit into the inner diameter of the tubular body (12). Three-dimensional. 3. An assembly for inserting a cylindrical body of a probe with an electric component unit holding function according to claim 1, wherein the frame portion (6) is composed of parallel plates (35) (36) facing each other. . 4. The cylindrical body inserting assembly for a probe with an electric component unit holding function according to claim 3, wherein the parallel plates (35) (36) are connected at their intermediate portions by an arc-shaped plate (37). Three-dimensional. 5. The frame (6) has a cylindrical body (3) having a cutout (33).
4) The cylindrical body inserting assembly for a probe with a function for holding an electric component unit according to claim 1 or 2. 6. The inner diameter of the tubular body (12) is such that a portion (41) to which the holding portion (31) of the stylus portion (1) is fitted has a connecting portion (2) of the frame (4). ) Is smaller than the fitting part (42) of the holding part (32),
Both parts are continuous with the step surface (43) as a boundary, and the outer surface of the holding part (32) of the connecting part (2) of the frame (4) and the frame part are connected to this step surface.
The tube of the probe with an electric component unit holding function according to claim 2, wherein a fitting position between the tube body and the frame is determined by contacting a step surface (38) formed between the outer surfaces of (6). Body insertion assembly. 7. The electric component unit holding device according to claim 1, wherein the holding pieces (9) (10) are respectively inclined in the same direction with respect to the frame portion (6). An assembly for inserting a probe into a cylinder.