JPH0338651Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a latch mechanism for a draw-out type recorder that is constructed so that maintenance work can be performed by drawing out the main body containing the recorder etc. from the case.

Conventionally, this type of drawout recorder is provided with a latch mechanism as shown in FIG. 1, for example, when it is housed in a predetermined case. That is, in FIG. 1, reference numeral 10 indicates a meter body, and an engaging lever 12 is pivotally attached to the side surface of this body 10, and a spring 14 is attached to this lever 12, so that the lever 12 is rotated around its pivot shaft 16. When the main body 10 is drawn out from the case 18 by applying a rotational force in a clockwise direction from the center, the engagement end 12a of the lever 12 fits into the engagement hole 20 formed in the bottom surface of the case 18,
The body 10 is configured to latch onto the case 18.

However, in the conventional latch mechanism configured as described above, the engagement end 12a of the lever 12 is always elastically in contact with the inner surface of the case 18.
There is a drawback that the inner surface of the case 18 may be damaged depending on the frequency of the drawout operation of the main body 10. For this reason,
For example, it is possible to set the elasticity of the spring 14 to be weak, but in this case, the main body 1
When drawing out 0 quickly, there is a risk that the operation of the lever 12 will be delayed and the main body 10 will pop out from the case 18. In addition, as shown in FIG. 1, if the latch mechanism is provided on the right side of the main body 10, when using the right hand to draw out the main body, the right hand cannot be removed (especially when the main body 10 is on an inclined surface). ), the machine must be operated with the left hand, and work efficiency is extremely poor.

However, it is generally necessary to pull out the stored recorder from the case when replacing consumables such as recording paper, recording pens, and ink (daily operations), and when replacing the zero point or Maintenance work such as sensitivity adjustment or circuit inspection may be performed. However, in the case of the former daily operation, the purpose is usually achieved by drawing out 1/3 to 1/2 of the total length of the main body. However, with conventional recorders, it is difficult to perform daily operations in an unstable state where the latch mechanism does not operate, or, especially when the main body is installed on an inclined surface, the main body may be operated unnecessarily until the latch mechanism operates. There were various difficulties in handling it, such as having to draw it out.

Therefore, the inventor of the present invention made various studies to overcome all the problems with the latch mechanism of the conventional drawout type recorder mentioned above, and as a result, created a pair of protrusions on a single lever separated by a predetermined distance. , one protrusion is used as an operating knob and the other is an engagement protrusion, and the lever configured in this way is attached to the inner surface of the upper part of the main body, and each of the protrusions protrudes from a hole provided on the upper surface of the main body. When the main body is drawn out from the case, the operating knob protrudes from the top surface of the main body, so that the engagement projection protrudes from the top surface of the main body and fits into the engagement hole provided on the inner surface of the case. By configuring a latching mechanism and providing two latching mechanisms configured in this manner spaced apart by a predetermined distance in the drawout direction of the main body, the main body can be latched in a half-open state and a fully open state, respectively, and the above-mentioned problem can be solved. We discovered that it is possible to eliminate all the points at once.

Therefore, the purpose of the present invention is to enable easy latching by drawing out the instrument body with a built-in recorder in a state suitable for maintenance, and to facilitate confirmation of the latched state and release operation, and to prevent damage to the inner surface of the case. The object of the present invention is to provide a latch mechanism for a drawout type recorder which is simple in construction and convenient to handle, and which can prevent such problems.

In order to achieve the above object, in the present invention, a main body with a built-in recorder is housed in a case,
A latch mechanism for a draw-out type recorder that latches the main body to the case at a predetermined position when the main body is drawn out from the case, comprising a lever having an engaging protrusion and an operating knob made of a soft material, Two levers are provided on the upper surface of the main body, each separated by a predetermined distance in the drawout direction, and the operating knob is located forward of the engagement protrusion in the drawout direction of the main body, and the tip thereof is is located slightly above the tip of the engagement protrusion, and the lever is attached to the upper inner surface of the main body so that the operating knob and the engagement protrusion protrude from the hole provided on the top surface of the main body. When the main body is drawn out from the case, each of the operating knobs protrudes from the upper surface of the main body, thereby providing an engagement hole in the inner surface of the case that engages with each of the engagement protrusions that protrude from the upper surface of the main body. It is characterized by

In the latch mechanism of the drawout recorder described above, the lever having the operating knob and the engaging knob has a mounting piece connected to one end via a hinge, and this mounting piece is fixed to the inner surface of the upper part of the main body. Preferably, a spring is attached to the hinge to impart upward elasticity to the lever.

Next, embodiments of the latch mechanism of the drawout recorder according to the present invention will be described in detail with reference to the accompanying drawings.

2 and 3 show one embodiment of the latch mechanism of the present invention. In FIG. 2, reference numeral 22 indicates a meter body containing a recorder, and 24 indicates a case in which this main body 22 is housed. In this embodiment, a pair of latch mechanisms 28 and 30 are arranged on the top plate 26 of the main body 22 at a predetermined distance from each other in the drawout direction of the main body 22.

However, the latch mechanisms 28 and 30 have the same structure, and have two protrusions 32 and 34 that stand upwardly at different positions in the longitudinal direction.
A mounting piece 40 is coupled to one end of the lever 36 via a hinge 38, and the mounting piece 40 is fixed to the inner surface of the top plate 26 of the main body 22, and a spring 4
2 is provided so that the lever 36 can stand elastically upward. In addition, the top plate 2 of the main body 22
6 has holes 44, 4 at positions corresponding to the protrusions 32, 34 when the lever 36 is installed.
6 is bored so that the protrusions 32 and 34 protrude to the upper part of the main body 22. In addition, the lever 3
An operation knob 8 made of a soft material such as plastic is attached to the protrusion 32 located at the tip of the knob 6, and the head of the knob 48 is formed into a curved shape. It is configured to be located above the tip of the engagement protrusion 34 located at the middle portion of the lever 36.

On the other hand, the latch mechanism 28 having the above-described configuration,
30, an engagement plate 52 having an engagement hole 50 into which the engagement protrusion 34 provided on the lever 36 of the latch mechanism 28, 30 is fitted is attached to the upper inner surface of the opening of the case 24. In this case,
The engagement plate 52 may be omitted and the engagement hole may be formed directly in the case 24.

Next, the operation of the latch mechanism according to the present invention constructed as described above will be explained. In FIG. 2, the latch mechanism 28 located at the front of the main body 22 is referred to as a first latch mechanism, and the latch mechanism 30 located at the rear thereof is referred to as a second latch mechanism. However, FIG. 2 shows a case where the main body 22 is drawn out by about 1/2, and when the knob 48 of the first latch mechanism 28 is exposed to the outside of the case 24 and protrudes upward,
An engagement protrusion 34 provided integrally with this
It moves while abutting an engagement plate 52 provided on the inner surface of the case 24 and fits into the engagement hole 50 of the engagement plate 52,
The main body 22 and the case 24 are in a latched state. That is, the latched state of the first latching mechanism 28 with respect to the case 24 at this time is as shown in FIG.

In the state in which the first latch mechanism 28 is latched, the head of the knob 48 of the second latch mechanism 30 is in contact with the inner surface of the case 24, and in such a case, the engagement protrusion 34 is in contact with the inner surface of the case 24. Even if the main body 22 is drawn out in this state, the inner surface of the case 24 will not be damaged. Therefore, when the main body 22 is housed in the case 24, the first latch mechanism 28 is also in the same state as the second latch mechanism 30, and damage to the inner surface of the case 24 by the latch mechanism members can be prevented.

Next, in order to release the latched state of the first latching mechanism 28, by pressing down the knob 48 of the first latching mechanism 28, the engagement protrusion 34 is released from the case 2.
The main body 22 can be easily removed from the engagement hole 50 of the engagement plate 52 attached to the inner surface of the case 24, and as a result, the main body 22 can be further drawn out or stored in the case 24. Incidentally, when the main body 22 is further drawn out, the second latch mechanism 30 latches with the case 24 as in FIG. 2 (see FIG. 4).

As is clear from the embodiments described above, the latch mechanism according to the present invention has two latch mechanisms on the top surface of the main body housing the recorder, so that the case can be drawn out in two ways: a half-open state and a fully open state. The main body can be latched at the button, making daily operation of the recorder extremely easy.
Further, the operator can easily check the position and operating state of the latch mechanism, and can easily perform the drawout operation and the latch release operation by alternately using both hands, which is convenient for handling. Furthermore, in the latch mechanism of the present invention, the engaging protrusion that achieves latching does not come into contact with the inner surface of the case, and only the operating knob made of a soft material contacts the inner surface of the case. , damage to the inner surface of the case can be reliably prevented.

Although preferred embodiments of the present invention have been described above, it goes without saying that various improvements and changes can be made without departing from the spirit of the present invention.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional side view showing a latch mechanism of a conventional drawout recorder, FIG. 2 is a configuration diagram showing an embodiment of the latch mechanism of a drawout recorder according to the present invention, and FIG. This figure is a perspective view of the main part of the latch mechanism shown in FIG. 2, and FIG. 4 is a perspective view of the main body of a drawout type recorder to which the latch mechanism according to the present invention is attached. 10... Instrument body, 12... Engagement lever, 1
4...Spring, 16...Pivot shaft, 18...Case,
20...Engagement hole, 22...Instrument body, 24...Case, 26...Top plate, 28, 30...Latch mechanism, 32, 34...Protrusion, 36...Lever, 3
8...Hinge, 40...Mounting piece, 42...Spring,
44, 46...hole, 48...knob, 50...
Engagement hole, 52...Engagement plate.

Claims (1)

[Scope of claim for utility model registration] (1) The main body with a built-in recorder is stored in a case,
A latch mechanism for a draw-out type recorder that latches the main body to the case at a predetermined position when the main body is drawn out from the case, comprising a lever having an engaging protrusion and an operating knob made of a soft material, Two levers are provided on the upper surface of the main body, each separated by a predetermined distance in the drawout direction, and the operating knob is located forward of the engagement protrusion in the drawout direction of the main body, and the tip thereof is is located slightly above the tip of the engagement protrusion, and the lever is attached to the upper inner surface of the main body so that the operating knob and the engagement protrusion protrude from the hole provided on the top surface of the main body. When the main body is drawn out from the case, each of the operating knobs protrudes from the upper surface of the main body, thereby providing an engagement hole in the inner surface of the case that engages with each of the engagement protrusions that protrude from the upper surface of the main body. A latch mechanism for a drawout recorder featuring: (2) In the latch mechanism described in claim 1 of the utility model registration claim, the lever having the operating knob and the engaging knob has a mounting piece connected to one end via a hinge, and the mounting piece is attached to the upper part of the main body. A latch mechanism for a drawout type recorder, which is fixed to the inner surface and has a spring attached to the hinge to give upward elasticity to the lever.