DE8006566U1 - Position measuring device with contact sockets for electrical connections - Google Patents

Description

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DR. JOHANNES HEIDENHAIN GMBH March 5, 1980

Position measuring device with contact sockets for electrical connections

The invention relates to a position measuring device according to the preamble of claim 1.

Measuring devices of this type are known. With the connection technology Such measuring devices deal with e.g. DE-AS 12 63 327, DE-AS 12 98 299 and DE-GM 19 85 138.

In DE-AS 12 63 327 and in DS-GM 19 85 138 takes place Connection of the present in conductor track form electrically Conductive measuring grid with the help of cables that are soldered to the grid and through holes to the back of the carrier— out the body, or around it to the rear.

In DE-AS 12 98 299 the connections are already in part guided in conductor track technology to the back of the carrier body and open into connections there. Part of these connections is located on recesses that are offset from the surface of the measuring standard.

Such connections have disadvantages, since the cable connections from the measuring grid to the connection are mechanical are sensitive and the connection sockets can be torn out when changing the contact pins. The connection—

Bushings cannot be provided with screw connections either as a safeguard against rotation is not provided.

It is the object of the invention to address the existing disadvantages in connection with the connections to electrically conductive grids avoid and create a measuring device with contact sockets that can be securely connected, in which the loosening the contacts do not damage the measuring razor: em leads and simplify the manufacture of the measuring device.

This object is achieved by the features specified in the characterizing part of the claim.

The further design options are indicated by the features of the subclaims.

The advantages of the embodiment according to the invention are:

1.) Secure fit of the contact socket even when changing the connecting pin,

2.) Securing against twisting of the socket, thus also screw connection possible,

3.) Electroplating of the contact socket (gold plating) possible, as a through-hole is provided,

4.) There is no risk of damage during assembly or operation of the measuring device the connection points come because the contact sockets are not protrude beyond the surfaces of the components,

5.) electrical connection also possible from the rear of the components.

The invention is intended to be based on the drawing with the aid of an illustration management example are explained in more detail.

Il MM

j / - 5 -

A metallic scale body 1 carries on its surface a measuring graduation 2 produced in conductor path etching technology in the form of an electrically conductive grid. The mode of action j of measuring devices with such graduations is generally

f: mentioned prior art is sufficiently described so that

|: does not need to be discussed in more detail. The graduation 2

"is insulated from the scale body 1. In the scale body 1

! ■: There are slot-shaped recesses 3 and 3 'ι with

Through holes 4 are connected in such a way that Ab-

f gradations result due to the different dimensions.

|: A part 5 and 5 'is inserted into these recesses 3 and 3'

|: a two-part insulator inserted. The insulating

I body part 5 is manufactured using plastic injection molding technology and

I has prismatic recesses 6, in the form-fitting

[;; Contact sockets 7 are used. The contact sockets 7

I carry prismatic lugs 7 \ into which the prismatic ones

I recesses 6 are fitted in such a way that between the

sets 7 'and the bottom of the recesses 6 a soldering lug 8 can be attached, which is in electrical connection with the measuring graduation 2. The electrical connection will produced by soldering 9. The insulating body part 5 ', which is injection-molded from plastic, has a conical outer region

I recesses 10. The contact sockets 7 can at their,

I ends opposite the prismatic lugs 7 '

; ^; be widened conically so that the spread cone—

; jacket 7 "after inserting the two insulating

J body parts 5 and 5 'i ⁿ the recesses 3 and 3' in such a way

■ i »; contracts that a loosening of the contact socket 7 by

I Rotation or by pulling out perpendicular to the rule—

: ■ body 1 not possible without destroying the contact socket 7

;, is. The through-hole arranged in the contact socket 7

j | Bore 11 is used to receive a contact pin, the

ü; the electrical connection to the evaluation electronics or

; Λ to supply the measuring system. With correspond-

I; the design of the bore 11 is also a screw connection

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possible. The contact socket 7 can also be galvanically gold-plated in the through-hole 11, which improves the situation of electrical contact contributes significantly.

The graduation 2 is provided with a protective lacquer layer to protect against negative influences.

Claims (6)

DR. JOHANNES HEIDENHAIN GMBH March 5, 1980 Claims 1. Position measuring device with contact sockets for electrical connections to electrically conductive grids on surfaces Components that move relative to one another - for example in the form of a measuring standard and a scanning plate of length or angle measuring devices - for direct Contacting the grid to the connections, characterized in that at least one contact socket (7) is positively locked with the help of an insulating body (5, 5 ') in one of the components (1) twisting and pulling out securely - not protruding over the surface of the component (1) - is attached and electrically connected to the grid (2) connected is. 2. Position measuring device with contact sockets according to claim 1, characterized in that the insulating body (5i 5 ') secured against rotation in an elongated hole (3, 3 ') is arranged in the measuring standard (1) or the scanning plate, and has approaches that act as a safeguard against Pull out the insulating body (5, 5 ') from the dimension body (1) or the scanning reticle are used perpendicular to the grid plane. ■ J 3. Position measuring device with contact sockets according to claim Ί and 2, characterized in that the contact sockets (7) in prismatic recesses (6) of the insulating body (5, 5 ') are arranged rotation-secure, and that the securing against withdrawal of the contact sockets (7) from the insulating body (5, 5 ¹⁾ is given perpendicular to the grid plane by approaches (7 ¹ ) and expansion (7 ") of the contact sockets (7). 4. Position measuring device with contact sockets according to claim 1, characterized in that each of the contact sockets (7) has a through hole (1t). 5 · Position measuring device with contact sockets according to the claims 1 and 4 ·, characterized in that the through- through holes (11) are designed as conical bores. 6. Position measuring device with contact sockets according to claims 1 and A-, characterized in that the through- through holes are designed as threaded holes. 7- Position measuring device with contact sockets according to the claims 1 and 4 ·, characterized in that the contact - Bushings (7) are galvanically gold-plated.