JPH0414408B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a connection device between a board attached to the head of a VTR cylinder and a board attached to a rotary transformer.

[Background of the invention]

As shown in FIG. 1, a conventional VTR cylinder commonly used consists of a lower cylinder 1 and an upper cylinder 9. A shaft 3 rotatably supported by the lower cylinder 1 via a bearing 2 has a Disk 5 is fitted. A rotary transformer 4 is mounted on the lower end surface of the disk 5, and a rotary transformer board 7 is mounted on the rotary transformer 4. The upper cylinder 9 is assembled to the disk 5, a head base plate 8 is attached to the lower end surface of the upper cylinder 9, and a head board 10 is attached to the head base plate 8.

In a VTR cylinder configured as above,
It is necessary to connect the head board 10 and the rotary transformer board 7 for electrical continuity, but as is clear from the figure, this connecting member is provided in a narrow space between the lower cylinder 1 and the upper cylinder 9. Therefore, it is difficult to visually inspect or insert a soldering iron in the assembled state.

The above-mentioned conventional connection device is configured as follows.

(a) A through hole 13 is provided in the upper cylinder 9 in advance.

(b) T terminal 6 is attached to the rotary transformer board 7 in advance.
Solder it. A conducting wire 12 is connected to one end of this T terminal 6.

(c) Connect the conductive wire 11 to the head board 10 in advance by soldering.

(d) Assemble the upper cylinder 9 while inserting the conductive wires 11 and 12 and the T-terminal 6 into the through hole 13. A relay board 1 is attached to the outer end surface of the upper cylinder 9.
4 is installed.

(e) Connect the conductive wires 11 and 12 to the relay board 14 to establish continuity.

As described above, the conventional connection device is composed of a large number of components, and the connection operation thereof is complicated and requires a great deal of labor, and is difficult to automate.

2 to 7 show other conventional examples. The VTR cylinder shown in FIG. 2 has a terminal body in which a terminal pin 22 as shown in FIGS. 21, a head board 18 is attached to the head base plate 8, and the terminal pins 22 are configured to pass through the head board 18, unlike the conventional example shown in FIG.
Since the other structures are the same, their explanation will be omitted.

5 and 6, which respectively show a front view and a side view of the head assembly corresponding to the terminal pin 22, the head base plate 8 has a conductive wire 1.
5 is wound around the head 16, and the terminal end of the conductive wire 15 is soldered to a conductor plate 20 on a head board 18 attached to the head base plate 8. The head board 18 has a shape that protrudes from the head base plate 8. A hole 19 for coupling with the terminal pin 22 is formed in the protruding portion a, and a thin conductive plate 20 is attached to the head base plate 18 so as to completely cover the hole 19. For gluing, the portion of the conductor plate 20 facing the center of the hole 19 is a tongue piece 20a.
A cross-shaped cut is provided to form a .

The terminal main body 21 and the head base plate 18 constructed in this way are respectively attached to the head board 7 and the head base plate 8 as shown in FIG. 2, and the pin portions 22a of the terminal pins 22 are attached to the head base as shown in FIG. The hole 19 provided in the plate 18 allows play. At this time, since the pin portion 22a is pushed into a cross-shaped cut in the conductor plate 20, the tongue piece 20a formed by the conductor plate 20 slides against the pin portion 22a while being elastically deformed, and is elastically restored. They come into contact with each other due to force and become conductive.

According to the conventional example described above, the structure is simple;
In addition, the number of parts is small, and the number of assembly steps such as soldering is greatly reduced, and the head board 18 and rotary transformer board 7 can be connected by simply assembling the upper cylinder 9 on the disk 5. However, in this conventional example, since the substrates 18, 7 and the terminal pins 22 have almost no flexibility, it is difficult to absorb the dimensional tolerances of the head 16 and the rotary transformer 4. This may cause problems in the precise positioning of the heads by slightly moving the head base plate 8 after the lower cylinders 9, 1 are assembled.

[Purpose of the invention]

In view of the above, it is an object of the present invention to provide a connecting device with a simple structure that can automatically absorb misalignment of the head board and rotary transformer board and connect and conduct them by simply attaching the upper cylinder to the disk. The purpose is to

[Summary of the invention]

To achieve the above object, the present invention provides a connecting device for connecting a board attached to the head of a VTR cylinder and a board attached to a rotary transformer, in which the head board is made of a flexible member, and the head base is mounting it on a board or support plate, implanting a terminal pin in the rotary transformer board, and providing a hole in the head base board or support plate for the terminal pin to play,
A conductor plate covering the hole is attached to the head board, and radial cuts are made in the parts of the conductor plate and the head board facing the center of the hole, so that these cuts form a leaf spring-like tongue piece. It is characterized by the fact that

[Embodiments of the invention]

Hereinafter, one embodiment of the connecting device of the present invention will be described with reference to the drawings (FIGS. 8 to 14). Among the symbols shown in FIGS. 8 to 14, the same symbols as those in FIGS. 2 to 7 indicate the same or corresponding parts.

In FIG. 8, a terminal main body 21' having terminal pins 22 embedded therein is attached to the rotary transformer board 7, and a head substrate 23 made of a flexible member is attached to the head base plate 8, and the terminal pins 22 are attached to the head base plate 8. 22 is configured to be loosely inserted into a hole (not shown) provided in the head substrate 23. The rest of the structure is the same as that in FIG. 2, so the explanation will be omitted.

The terminal body 21' is made of insulating synthetic resin and has the shape shown in FIGS. 9 and 10.
A letter-shaped terminal pin 22 is integrally molded with its pin portion 22a standing upright. The terminal pin 22 is not limited to the L-shape, and may be made of a conductive and rigid material, and the pin portion 22a may be supported upright. The shape of the upper end of the pin portion 22a is arbitrary, but it is convenient to make the tip slightly pointed, such as a spherical or conical shape. In addition, the terminal body 21'
If the terminal pin 22 is made of a synthetic resin having insulating properties as described above, it is convenient for installing the terminal pin 22.

On the other hand, the head assembly corresponding to the above terminal pin 22 is constructed as shown in FIG. 11 (front view) and FIG. 12 (side view).

That is, a head 16 having a conductive wire 15 wrapped around it is attached to the head base plate 8, and the terminal end of the conductor 15 passes through a hole 17 provided in the head base plate 8, and the head 16 is attached to the head base plate 8. It is soldered to a conductor plate 20' on a head board 23 having a conductor plate 20'. There is a portion of the conductor plate 20' that is connected to a terminal pin (not shown) at a portion slightly away from the portion where the conductor wire 15 is soldered (see FIGS. 11 and 12), and the head base plate 8 has a
As shown in the figure and FIG. 14, a hole 24 is provided into which the pin portion 22a of the terminal pin is inserted.
This hole 24 may be a hole that does not penetrate the head base plate 8.

A conductor plate 2 is placed in the hole 24 to cover it.
0' is provided, and the hole 2 of the conductor plate 20'
There are four tongue pieces 2 on the part opposite to the center part of 4.
An arbitrary number of radial cuts are provided so that 0'a can be formed. The head substrate 23 has a portion 25 remote from the hole 24 with respect to the head base plate 8.
In this case, they are bonded together as shown in FIG.
The conductor plate 20' is made of a phosphor bronze plate, and can be made of any conductive material having spring elasticity.

The terminal main body 21' and the head board 23 configured as described above are attached to the rotary transformer board 7 and the head base board 8, respectively, as shown in FIG.
2a is loosely inserted into the hole 24 of the head base plate 8. The cross section in this state is as shown in FIG. That is, since the pin portion 22a is pushed into the radial cut of the conductor plate 20', the conductor plate 20'
The tongue piece 20'a formed at 0' slides on the pin part 22a while being elastically deformed, and comes into contact with the pin part 22a due to the elastic restoring force, thereby establishing conduction. Arrows B and C shown in FIG. 14 indicate the direction of insertion of the terminal pin 22 into the head base plate 8 and the direction of elastic deformation of the tongue piece 20'a, respectively.

In FIG. 14, even if the position of the terminal pin 22 and the center position of the cut in the conductor plate 20' are slightly shifted due to variations in the dimensions and assembly accuracy of each component, the head board 23 has flexibility. Moreover, since the head base plate 8 is bonded to the head base plate 8 at a location 25 away from the location where the cut is made in the conductor plate 20', the head base plate 23 bends in response to the positional shift. It is possible to connect without difficulty because it absorbs

Therefore, the relay board 14, the conductive wires 11, 12, the T-terminal 6, etc. in the conventional example shown in FIG. 1 are no longer necessary, and the labor of soldering these members and penetrating the through hole 13 can be omitted. can. That is, simply by assembling the upper cylinder 9 to the disk 5, it is possible to easily connect the head board 23 and the rotary transformer board 7.

15 to 17 show a front view and a side view of a head assembly according to another embodiment of the present invention, and a sectional view of a state in which a conductor plate and a terminal pin are connected, respectively.

In this embodiment, a support plate 26 is attached to the head base plate 8, and this support plate 26 is attached to the head base plate 8.
A flexible head substrate 23' is mounted on the head 6. The support plate 26 and the head board 23' are shaped to protrude from the head base plate 8, and the support plate 26 has holes 2 for coupling with the terminal pins 22 at the protruding portion a.
4' is provided. A thin conductor plate 20' is attached to the inner surface of the head board 23' so as to completely cover the hole 24', and the conductor 20' and the head board 23' face the center of the hole 24'. Cuts are made radially in the section, and four tongue pieces 20' are formed.
It is configured to form a. Further, the head board 23' is connected to the support plate 26.
It is the same as in the previous embodiment (FIGS. 8 to 14) that it is attached at a portion remote from the hole 24'. Even in the embodiment configured in this way, the same effects as in the previous embodiment can be obtained.

〔Effect of the invention〕

As explained above, according to the present invention, by simply assembling the upper cylinder to the disk, the misalignment between the head board and the rotary transformer board can be automatically absorbed, and the connection and conduction can be established. It is possible. Therefore, it is possible to fully automate and save labor in assembling the VTR cylinder.

[Brief explanation of drawings]

Figures 1 and 2 are sectional views of conventional VTR cylinders, Figures 3 and 4 are front views and plan views of the terminal bodies in Figures 1 and 2, and Figures 5 to 7. is the head in Figures 1 and 2.
A front view, a side view, and a sectional view showing the connection state of the terminal pin and the conductor plate of the Assy, FIG. 8 is a sectional view showing an embodiment of the VTR cylinder according to the present invention, and FIGS. 9 and 10. The figures are a front view and a plan view of the terminal body of the same embodiment, and Figures 11 to 1
3 is a front view, a side view, and an enlarged view of the same side of the head assembly of the same embodiment, and FIG. 14 is a sectional view showing the state of connection between the terminal pin and the conductor plate of the same embodiment.
FIGS. 15 to 17 are a front view, a side view, and a sectional view showing a state in which a terminal pin and a conductor plate are connected to each other, of a head assembly according to another embodiment of the present invention. 7... Rotary transformer board, 8... Head base plate, 20, 20'... Conductor plate, 20'a... Tongue piece, 22... Terminal pin, 23, 23'... Head board, 24, 24'... ...hole, 26...support plate.

Claims (1)

[Claims] 1 In a connection device between a board attached to the head of a VTR cylinder and a board attached to a rotary transformer, the head board is made of a flexible member, and is attached to a head base plate or a support plate, and the rotary transformer Terminal pins are implanted in the board, holes for the terminal pins to play are provided in the head base plate or support plate, a conductor plate covering the holes is attached to the head board, and holes are provided in the conductor plates and the holes in the head board. It is characterized in that an arbitrary number of cuts are made radially in the opposing parts, and these cuts form leaf spring-like tongue pieces.
Connection device between VTR head and transformer.