CN104964700A

CN104964700A - Optical encoder

Info

Publication number: CN104964700A
Application number: CN201510292352.3A
Authority: CN
Inventors: 胡俊廷
Original assignee: GAOMING ELECTRONICS (HUIZHOU) CO Ltd
Current assignee: GAOMING ELECTRONICS (HUIZHOU) CO Ltd
Priority date: 2015-05-29
Filing date: 2015-05-29
Publication date: 2015-10-07
Anticipated expiration: 2035-05-29
Also published as: CN104964700B

Abstract

The invention discloses an optical encoder. The optical encoder comprises a housing, a rotor, a baffle plate, a support, a silicon handle, a pot elastic sheet, a transmitter-receiver grating and a PCBA. The transmitter-receiver grating is electrically connected on the PCBA. The transmitter-receiver grating comprises a transmitting grating and a receiving grating. The rotor which is arranged inside the housing in a penetrating way is in transmission connection with the baffle plate. The baffle plate has a plurality of separation blades. Light through holes are formed among the separation blades. The separation blades are sequentially shuttled back and forth between the transmitting grating and the receiving grating. The support is arranged on the PCBA. The baffle plate is arranged on the support in a rotary way. The silicon handle is fixedly arranged on the support. The silicon handle abuts on the PCBA through the pot elastic sheet. The rotor passes through the baffle plate and the support and further abuts on the silicon handle. By means of the rotor to drive the baffle plate to rotate, the optical encoder achieves receiving and shielding of a transmitter-receiver grating light source and thus outputs stable high and low-frequency signals. By adopting the transmitter-receiver grating to make the light source directly received, the optical encoder makes errors caused when the light source is transmitted through a light guide column reduced. The optical encoder which achieves more stable performance has the characteristics of simpler structure, simplified assembly technology and product cost decrease.

Description

A kind of optical encoder

Technical field

The present invention relates to a kind of scrambler, particularly relate to a kind of optical encoder.

Background technology

Optical encoder is a kind of sensor by opto-electronic conversion, the geometry of machinery displacement on output shaft being converted to pulse or digital quantity, be current widely used sensor, be mainly used on the numerical control devices such as vertical machining centre, horizontal Machining centers, gantry machining center.

Traditional optical encoder generally includes one to launch grating and two reception gratings, realizes the reception to light source, then go by block the reception and the blocking-up that control light source, thus form unstable low-and high-frequency signal by light-guiding pillar.And the complex structure of this kind of product, assemble loaded down with trivial details, production cost is high, unstable properties.

Summary of the invention

The object of the invention is to overcome weak point of the prior art, provide a kind of and form stable low-and high-frequency signal, the structure of product is simple, and easily, production cost is low, the optical encoder of stable performance in assembling.

The object of the invention is to be achieved through the following technical solutions:

A kind of optical encoder, comprising: housing, rotor, block, support, silica gel handle, bowl shell fragment, correlation grating and PCBA, described block, support, silica gel handle, bowl shell fragment, correlation grating and PCBA are contained in described housing;

Described correlation grating is welded on described PCBA, and described correlation grating has one and launches grating and a reception grating;

Described rotor is arranged in described housing and is in transmission connection with described block, and described block has multiple catch, forms light hole between multiple described catch, and multiple described catch shuttles back and forth successively between described transmitting grating and described reception grating;

Described is set up on described PCBA, described block rotates and is installed on described support, described silica gel handle is fixed on described support, and described silica gel handle is abutted with described PCBA by described bowl shell fragment, and described rotor is arranged in described block and described support abuts with described silica gel handle.

Preferably, described optical encoder also comprises iron covering sheet, and described iron covering sheet is closed in one end of described housing.

Preferably, described optical encoder also comprises insulation film, and described insulation film is located between described iron covering sheet and described PCBA.

Preferably, described optical encoder also comprises connector, and described connector is arranged in described housing and welds with described PCBA.

Preferably, described optical encoder also comprises bow-shaped shrapnel, and described inner walls offers accepting groove, and described bow-shaped shrapnel is contained in described accepting groove.

Preferably, described optical encoder also comprises web member, and described web member is fastened on described housing.

Preferably, described web member offers screw thread.

Preferably, multiple described catch circular array distribution centered by the axis of described rotor.

Optical encoder drives block to rotate by rotor, realizes the reception of correlation grating light source and blocks, thus the low-and high-frequency signal of stable output.Adopt correlation grating that light source is directly received, reduce light source and occur error by light-guiding pillar transmission, the performance of product is more stable, and the structure of product is more simple, and packaging technology simplifies, and reduces the production cost of product.

Accompanying drawing explanation

Fig. 1 is the one-piece construction figure of the optical encoder of one embodiment of the invention;

Fig. 2 is the cut-open view of the optical encoder shown in Fig. 1;

Fig. 3 is the decomposition chart of the optical encoder shown in Fig. 1.

Embodiment

Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.

As shown in Figure 1, it is the one-piece construction figure of the optical encoder 10 of one embodiment of the invention.See also Fig. 2, its cut-open view for the optical encoder 10 shown in Fig. 1 and decomposition chart.

Optical encoder 10 comprises: housing 100, rotor 200, block 300, support 400, silica gel handle 500, bowl shell fragment 600, correlation grating 700 and PCBA800, wherein, block 300, support 400, silica gel handle 500, bowl shell fragment 600, correlation grating 700 and PCBA800 are contained in housing 100.In the present embodiment, rotor 200 is zinc conjunction rotor, and support 400 is zinc conjunction support.

Correlation grating 700 is welded on PCBA800, and correlation grating 700 has one and launches grating 710 and a reception grating 720.

Rotor 200 is arranged in housing 100 and is in transmission connection with block 300, and block 300 has multiple catch 310, forms light hole 312 between multiple catch 310, and multiple catch 310 shuttles back and forth in transmitting grating 710 successively and receives between grating 720.Namely, rotor 200 rotates, the block 300 be attached thereto is driven to rotate, multiple catch 310 on block 300 and light hole 312 just and can receive between grating 720 alternately across transmitting grating 710, when catch 310 is through out-of-date, can block the light launched grating 710 and receive between grating 720, when light hole 312 is through out-of-date, the light launching grating 710 can be received grating 720 and receive.Rotor 200 drives block 300 to rotate, and by the control of the anglec of rotation, block 300 can discharge and cut off the light source of correlation grating 700, thus exports a signal, realizes conducting function.

In the present embodiment, multiple catch 310 is circular array distribution centered by the axis of rotor 200, and especially, the present embodiment is provided with four catch 310.

Support 400 is located on PCBA800, and block 300 rotates and is installed on support 400, and silica gel handle 500 is fixed on support 400, and silica gel handle 500 is abutted with PCBA800 by bowl shell fragment 600, and rotor 200 is arranged in block 300 and support 400 abuts with silica gel handle 500.Support 400, for support limit stop 300, simultaneously for fixing bowl shell fragment 600, makes silica gel handle 500 contact with PCBA800 by the pressing of rotor 200, realizes conducting function.

In the present embodiment, optical encoder 10 also comprises iron covering sheet 910 and insulation film 920, iron covering sheet 910 is closed in one end of housing 100, insulation film 920 is located between iron covering sheet 910 and PCBA800, insulation film 920 couples of PCBA800 serve insulating effect, prevent PCBA800 from directly contacting with iron covering sheet 910 and electric conduction phenomena occurs.

In the present embodiment, optical encoder 10 also comprises connector 930, and connector 930 is arranged in housing 100 and welds with PCBA800, can provide external power source by connector 930 for PCBA800.

In the present embodiment, optical encoder also comprises bow-shaped shrapnel 940, and housing 100 inwall offers accepting groove 110, and bow-shaped shrapnel 940 is contained in accepting groove 110.

Be noted that, in order to make optical encoder 10 more convenient to install, optical encoder 10 also comprises web member 950, and web member 950 is fastened on housing 100, web member 950 offers screw thread 952, housing 100 can be screwed together on external unit by screw thread 952.

Optical encoder 10 drives block 300 to rotate by rotor 200, realizes the reception of correlation grating 700 light source and blocks, thus the low-and high-frequency signal of stable output.Adopt correlation grating 700 that light source is directly received, reduce light source and occur error by light-guiding pillar transmission, the performance of product is more stable, and the structure of product is more simple, and packaging technology simplifies, and reduces the production cost of product.

Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.

Claims

1. an optical encoder, is characterized in that, comprising: housing, rotor, block, support, silica gel handle, bowl shell fragment, correlation grating and PCBA, and described block, support, silica gel handle, bowl shell fragment, correlation grating and PCBA are contained in described housing;

2. optical encoder according to claim 1, is characterized in that, described optical encoder also comprises iron covering sheet, and described iron covering sheet is closed in one end of described housing.

3. optical encoder according to claim 2, is characterized in that, described optical encoder also comprises insulation film, and described insulation film is located between described iron covering sheet and described PCBA.

4. optical encoder according to claim 1, is characterized in that, described optical encoder also comprises connector, and described connector is arranged in described housing and welds with described PCBA.

5. optical encoder according to claim 1, is characterized in that, described optical encoder also comprises bow-shaped shrapnel, and described inner walls offers accepting groove, and described bow-shaped shrapnel is contained in described accepting groove.

6. optical encoder according to claim 1, is characterized in that, described optical encoder also comprises web member, and described web member is fastened on described housing.

7. optical encoder according to claim 6, is characterized in that, described web member offers screw thread.

8. optical encoder according to claim 1, is characterized in that, multiple described catch is circular array distribution centered by the axis of described rotor.