JP2902271B2 - Caliper with communication device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a caliper with a communication device which can transmit measured data to and from a data processing device.

[0002]

2. Description of the Related Art For quality control, there is known a system in which measurement data of a caliper for outputting digital data is transmitted to a data processing device by wireless to perform data processing.
In order to maintain the quality of data transmission, a function of two-way communication is added. In this case, the caliper transmits an error detection code to the measurement data. The data processing device uses the error detection code to determine whether there is an error in the data. If the data is correct, the data is input to the data processing circuit, and if there is an error, the caliper requests retransmission. Such two-way communication makes it possible to ensure the quality of wireless transmission in which errors due to noise and the like are likely to occur.

[0003]

In order to provide the above-mentioned communication function, it is necessary to mount a transmission / reception circuit, a microprocessor and the like in addition to the measurement circuit on the slider portion of the caliper. However, when a transmission / reception circuit, a microprocessor, and the like are mounted on the slider, (1) the slider portion becomes too large, and (2) the slider portion becomes too heavy. Is reduced.

An object of the present invention is to solve such a problem and to provide a caliper with a communication device with improved usability.

[0005]

According to the present invention, there is provided a caliper having a main scale and a slider, and a measuring circuit for outputting digital data to the slider, wherein the main scale is slidable by being connected to the slider. A cover is attached to the housing, and a communication unit for performing data transmission between the measurement circuit and the outside is housed inside the cover, and the measurement circuit and the communication unit are disposed in the longitudinal direction.
It is characterized by a weight balance .

[0006]

According to the present invention, it is possible to make the caliper easy to use by attaching the handle cover for covering the main scale. Further, by storing the communication means inside the handle cover, the weight balance becomes better as compared with the case where all the electronic circuit components are mounted on the slider,
Operability of calipers with a communication device is improved.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external perspective view of a caliper according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view thereof. As shown in FIG. 2, the caliper main body includes a main scale 1 and a slider main body 2 slidably attached thereto. A circuit board 12 is attached to the slider body 2,
A measurement circuit IC4 for outputting displacement data as digital values, an LCD display 5 and the like are mounted on the circuit board 12.
The slider section 11 is configured. An antenna 13 is also provided on the circuit board 12.

A handle cover 3 is connected to the slider portion 11 and slidably accommodates the main scale 1. The handle cover 3 is made of, for example, plastic and has a window 17 so as to expose the display surface of the LCD display 5 to cover the slider portion 11.
As shown in FIG. 1, a transmission circuit IC6, a reception circuit IC7, and a microprocessor 8 for controlling these and digitally processing a transmission / reception signal are housed inside the handle cover 3. A button battery 9 is stored at the rear end of the handle cover 3.

FIG. 2 shows a specific housing state of the transmission circuit IC6, the reception circuit IC7, the microprocessor 8, and the like. That is, the handle cover 3 is composed of an upper lid 31 and a bottom plate 32 so as to sandwich the main scale 1 from above and below.
In the space between the upper lid 31 and the main scale 1, the transmission circuit IC
6, a circuit board 16 on which a receiving circuit IC 7, a microprocessor 8, a quartz oscillator 15 and the like are mounted is inserted in a state of being attached to the upper lid 31. The measurement circuit IC 4 on the circuit board 12 of the slider section 2 and each circuit on the circuit board 16 behind the circuit are connected by connection wiring 14 using a flexible printed board, for example. In order to perform bidirectional communication, an antenna transmission / reception switching circuit and the like are required in addition to the above circuit components, but these are omitted in the figure.

Note that the main scale 1 is covered with a handle cover 3, and the handle cover 3 is partially provided with a notch in order to perform a measurement operation while holding the handle cover 3. Here, a thumb roller 10 is arranged so as to be attached to the slider portion 2 so that the outer periphery of the roller is in contact with the main scale 1.

According to this embodiment, since the measuring operation can be performed by gripping the handle cover 3, excellent operability can be obtained.
In addition, since the circuit components for data transmission are arranged inside the handle cover 3, the circuit components do not concentrate on the slider portion 2 and the weight balance is not deteriorated. This also greatly improves the operability. In the embodiment, the two-way communication function is added. However, the present invention is also effective when a one-way communication function for only sending data from the caliper to the data processing device is added.

[0012]

As described above, according to the present invention, a handle cover which covers the main scale and is connected to the slider portion is provided.
By arranging the communication device inside, a caliper with a communication device with improved operability can be obtained.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a caliper according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Main scale, 2 ... Slider part, 3 ... Handle cover, 4 ... Measurement circuit IC, 5 ... LCD display, 6 ... Transmission circuit IC, 7
... Receiving circuit IC, 8 ... Microprocessor, 9 ... Battery,
DESCRIPTION OF SYMBOLS 10 ... Thumb roller, 11 ... Slider part, 12 ... Circuit board, 13 ... Antenna, 14 ... Connection wiring, 15 ... Crystal resonator, 16 ... Circuit board, 17 ... Window.

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G01B 3/20 101 G01B 7/02 G01B 21/02

Claims (2)

(57) [Claims] 1. A caliper having a main scale and a slider and having a measuring circuit for outputting digital data to the slider, wherein a cover is connected to the slider and the main scale is slidably accommodated. A communication means for performing data transmission between the measurement circuit and the outside is housed inside the cover, and the arrangement of the measurement circuit and the communication means is provided.
A caliper with a communication device, characterized in that the weight in the longitudinal direction is balanced by placement . 2. A caliper with a communication device according to claim 1, wherein said measurement circuit and said communication means are mounted on different circuit boards connected to each other.