JPH0520976Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a recording pen for a recorder, and more specifically, for use in course recorders in navigational instruments, depth sounders,
This invention relates to improvements in recording pens for fish finders and other measuring instruments, such as seismometers and automatic temperature recorders.

[Conventional technology]

Conventionally, as shown in Fig. 6, the structure of a recording pen for an automatic recorder of various measuring instruments is to attach a support made of a hard metal wire bent in a U-shape to a metal base B attached to a moving belt A. The recording pen D and the energizing brush E are attached to the support C by using the elasticity thereof, and the recording pen D and the energizing brush E are pressed and biased by the spring H in the direction of the recording paper F and the energizing rail G, respectively.
The movement of the moving belt A moves the metal substrate part B along between the recording paper F and the current-carrying rail G, and when a pulse signal or the like is input, the metal substrate part B moves between the paper F and the current-carrying rail G.
A structure is known in which electricity is applied to a recording pen D via an energizing brush E, and the recording paper F is discharged and recorded.

[Problems with conventional technology]

In the recording pen of the recorder having the above structure, the running position of the metal base B is between the current-carrying rail G and the recording paper F due to the structure of the pen, and running spaces S ₁ and S ₂ are provided on both sides of the moving belt A, respectively. There was a problem in that it was not possible to make the instruments more compact, and the structure was complicated, making it expensive.

Furthermore, when replacing the recording pen D or the energized brush E due to wear during use, etc., a twisting force is applied to the spring H that presses and biases the recording pen D and the energized brush E in the direction of releasing the pressing force, and the recording pen It is necessary to replace D or energizing brush E.
Since each part is small, and in particular the shape of the spring H is very small, it is necessary to be careful not to damage the spring H, and the replacement work is also troublesome. .

Of course, this kind of problem can be solved, for example, by
As disclosed in Publication No. 42916, a pen needle made of a straight wire is held by passing both parallel pieces of the U-shaped part through a pen needle holding part made of an elastic metal member formed into a substantially U-shape. However, this problem can be solved by creating a structure in which the pen needle is elastically bent and deformed in the direction of the recording paper using the elastic force of the curved part of the U-shaped part. If the recording pen D is structured to move along the recording paper F, it is necessary to support the pen needle in a direction parallel to the recording paper, so the space for replacing the pen needle is extremely limited, and it is difficult to use a thin pen needle. There was a problem that the work of inserting it into a small through hole was troublesome.

[Problems that the idea solves]

In view of the above-mentioned problems, this idea was made with the aim of making the recording pen of the recorder into a compound structure, contributing to the miniaturization of the entire instrument, and at the same time significantly simplifying the operability when replacing it. .

[Technology to solve problems]

That is, the recording pen of the recording device of this invention has both lengthwise edges of a strip-shaped metal plate folded back toward the surface.
and a substrate portion having notches provided at appropriate intervals from both longitudinal ends of the folded piece on one side, and a U-shaped curved portion that can be elastically fitted between the folded pieces of the substrate portion. The base is made of a hard piece of elastic material that is integrally formed with one piece of the U-shaped part having a folded part that fits into the notch, and the other piece of which is integrally formed with an extension part that is folded back toward the recording paper. The pen tip is made of metal wire.

〔Example〕

Next, this invention will be explained using examples.

FIG. 1 is a perspective view of an embodiment of this invention, FIG. 2 is a plan view of the base plate of the embodiment, FIG. 3 is a side view of the same, and FIG. 4 is a plan view of the pen tip. FIG. 5 is a side view of the same.

A recording pen 1 of the recording device of this invention consists of a base plate 2 attached to a moving belt A and pen tips 3 supported by the base plate 2.

The substrate portion 2 is formed by folding back both lengthwise edges 21, 21 of the strip-shaped metal plate 20 in the surface direction (in the direction of arrow P), and at appropriate intervals from both lengthwise ends 21B, 21B of the folded piece 21A on one side. Notches 22, 22 are provided at the positions where the L is entered, and the pen tip portion 3 has a U that can be elastically fitted between the return pieces 21A, 21A of the substrate portion 2.
The U-shaped curved portion is a base 30, and one piece 31 of this U-shaped portion has a folded portion 31A that fits into the notch 22, and the other piece has an extended portion 31B folded back toward the direction of the recording paper F. It is composed of a bent molded body of hard metal wire such as tungsten wire.

In the above embodiment, reference numerals 23 and 23 in the figure indicate folded portions 3 formed in the U-shaped portion of the pen tip portion 3.
This is a guide slanted notch for guiding 1A, and it is convenient if it is provided because mounting becomes easier.

[Effect]

As shown in FIG. 1, the recording pen 1 of the recording device of this invention is attached to a moving belt A, and performs recording while bringing an extension 31B extending from a base plate 2 into contact with a recording paper F.

At this time, one of the extending portions 31B is attached to the recording paper.
It goes without saying that the other extending portion 31B has its respective tip in contact with the current-carrying rail G.

To attach the pen tip 3 to the base plate 2, insert the U-shaped curved part of the pen tip 3 between the folded pieces 21A of the base plate 2, and connect the folded parts 31A to the folded pieces 21A of the base plate 2. It is only necessary to fit the pen tip 3 into the notch 22 of the U.
It is firmly fixed to the substrate part 2 by the elastic force of the character-shaped curved part.

In this fixed state, the extending portion 3 of the pen tip portion 3
The tip of 1B depends on the elasticity of the extending portion 31B itself in the bending direction and the torsional direction of the U-shaped curved portion (arrow Q
Direction) Due to its elasticity, it is pressed in the direction of the recording paper F and maintains contact.

In addition, when removing the pen tip portion 3, push the folded portion 31A toward the inside of the base plate portion 2,
It can be easily removed by disengaging from the notch 22 and pulling in the direction of pulling it out from the base plate part 2 in that state.

〔effect〕

Since this invention is constructed as described above, the recording pen 1 of the recorder can be constructed with only small parts such as the substrate part 2 and the pen tip part 3, and the recording pen itself is extremely miniaturized. Along with this, the space required for the recording pen to travel can be reduced, contributing to the miniaturization of instruments and making it possible to significantly reduce the structural cost of the recording pen 1 of the recording device.

Furthermore, since the pen tip section 3 can be replaced and removed by changing the opening interval of the U-shaped curved section and facing directly from the front of the board section 2, it has various practical effects such as easy parts replacement.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the embodiment of this invention, Fig. 2 is a plan view of the base plate of the embodiment, Fig. 3 is a side view of the same, Fig. 4 is a plan view of the pen tip, and Fig. 5 is the same. The side view and FIG. 6 are partially cutaway explanatory perspective views of a conventional example.

Claims (1)

[Scope of utility model registration request] A substrate portion formed by folding both lengthwise edges of a strip-shaped metal plate toward the surface and providing cuts at appropriate intervals from both lengthwise ends of the folded piece on one side; The base is a U-shaped curved part that can be elastically fitted between the folded pieces,
One piece of the U-shaped part has a folded part that fits into the notch, and the other part has an extension part folded back toward the recording paper, and the whole is made of an elastic hard metal wire. 1. A recording pen for a recording device, comprising a formed pen tip portion.