JPS641609Y2 - - Google Patents

Description

[Detailed explanation of the idea] This invention relates to an improvement in the pen mechanism of a recorder.

In recorders such as self-recording pressure gauges, a mechanism is used to hold the pen arm in a raised position in order to facilitate the operation of replacing the recording paper. Not only did it suffer from large elastic deformation, making it difficult to lift it smoothly, but it also had the disadvantage of poor durability.

This invention proposes a pen mechanism that can overcome these drawbacks, and will now be described based on embodiments shown in the drawings.

1 is a case, 2 is a lid, 3 is a clock body, and 4 is an output shaft of the clock body, which holds the center of the circular recording paper.
Reference numeral 5 indicates a recording paper receiving plate, 6 indicates a Bourdon tube, 7 indicates a bracket for holding the Bourdon tube, and 9 indicates a two-way open type coupler for connecting the piping of the fluid to be measured. Connected. Reference numeral 11 denotes a conduit for air bleeding, one end of which is connected to the Bourdon tube via a bracket 7, and the other end connected to an on-off valve 12. Note that the on-off valve 12 is kept closed during pressure measurement. One end of a link 14 is connected to the movable end of the Bourdon tube 6 via a connecting member 13, and the other end of the link 14 is connected to a boss 16 via a lever 15. This boss 16 is rotatable around a fixed shaft 17. 18 is a substantially L-shaped member that rotates together with the boss 16, and a member 20 is connected to the end thereof via a pin 19. A pen arm 21 made of an elastic plate is attached to the front surface of the member 20 with screws 22. A felt-tip pen 23 is attached to the tip (lower end) of the pen arm 21. Note that the recording paper is not attached in the drawing. A spring plate 24 is attached to the member 18 by rivets 25 along the member 18, and its movable end (front end) (left end in FIG. 2)
The rounded and bent part is pen arm 2.
By pushing the base 21a of 1 forward, the felt-tip pen is pressed against the recording paper. During measurement (recording)
With the pen arm in the state shown,
The felt-tip pen is pressed against the recording paper on the front of the recording paper receiving plate, but when replacing the recording paper, the pen arm rotates 90 degrees to separate it from the recording paper. FIG. 3 shows a state in the middle of rotation of about 45 degrees, where both the base 21a of the pen arm 21 and the spring plate 24 are elastically deformed. When rotated 90 degrees, the base 21a is positioned along the upper surface of the member 18 as shown in FIG.
The base portion 21a of No. 1 is pushed upward and biased. The position where the movable end of the spring plate 24 touches the base 21a is the pin 1.
9 (to the left in FIG. 2), this biasing force pushes the pen arm 21 clockwise in FIGS. 2 to 4 around the pin 19, and as a result, the tip of the base 21a The pen arm 21 is held in contact with the member 18. In other words, the pen arm remains raised 90 degrees. In this state, if the recording paper is replaced and the pen arm is returned to the state shown in FIGS. 1 and 2, recording can be performed again.

In this invention, a spring plate 24 is attached to one 18 of the members 18 and 20 that serves as a hinge for lifting the pen arm, and this spring plate presses and biases the base 21a of the pen arm 21. Therefore, when lifting the pen arm, Both the spring plate 24 and the pen arm base 21a are elastically deformed. Therefore, the base does not deform as much as in conventional pen arms, which alleviates excessive force on the pen arm and allows for smooth lifting movements. This results in a longer service life. Further, since the 90 degree angle is maintained by the spring plate 24, it is possible to easily replace the recording paper.

[Brief explanation of the drawing]

The drawings show an example of this invention: Figure 1 is a front view with the lid open, Figure 2 is a side view with the lid closed, and Figures 3 and 4 are views of the pen arm when lifted. It is a drawing explaining a state. 6...Bourdon tube, 18...Almost L-shaped member,
19... pin, 20... member, 21... pen arm, 21a... base, 22... screw, 24... spring plate, 25... rivet.

Claims (1)

[Scope of utility model registration request] The recorder has a member 20 that is pivotally connected via a pin 19 to a member 18 that serves as a hinge for lifting a pen arm made of an elastic plate, and the pen arm 21 is attached to the member 20, A recorder characterized in that a spring member 24 is attached to the member 18, and the movable end of the spring member 24 is slidably and elastically abutted against the base 21a of the pen arm 21, so that no unreasonable force is applied to the pen arm 21. pen mechanism.