CN2919272Y

CN2919272Y - Cover lifting detecting device

Info

Publication number: CN2919272Y
Application number: CN 200620014244
Authority: CN
Inventors: 郭石坤; 唐学东; 杨锦松; 赵关东
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2006-06-09
Filing date: 2006-06-09
Publication date: 2007-07-04
Anticipated expiration: 2016-06-09

Abstract

A lid type detection device comprises a lid, a base and a detection element that includes a rotary part and a detection switch, the rotary part being positioned on the lid and comprising a column shaft, the column shaft bushing being positioned in the shaft busing on the base, the detection switch being arranged inside the base and at a position with correspondence to the rotary part. The rotary part turns relatively to the base along with the lid, so that it would be in a state of resting in the base and contacting with the detection switch or a state of extending from the base and disconnecting with the detection switch.

Description

The flip pick-up unit

Technical field

The utility model relates to a kind of pick-up unit, particularly a kind of flip pick-up unit that detects the rotary state of the relative pedestal of flip.

Background technology

The capacity of laser disc such as CD, DVD is big, volume is little, is subjected to consumer's extensive favor.People use CD-ROM device that information is read information from video disc, or record information on the video disc.CD-ROM device generally includes spindle motor, optical R/W is first-class.Spindle motor is used to drive video disc and rotates; Optical read/write head is used to transmit a light beam to video disc, reading or writing with the information of carrying out.

CD-ROM device adopts a kind of superstructure that closes that lifts that spindle motor, optical read/write head and laser disc etc. are protected usually; thereby when CD-ROM device is worked; the user can not touch the video disc of spindle motor, optical read/write head or high speed rotating etc., avoids causing danger.In addition, CD-ROM device only must guarantee also that its spindle motor just can rotate when loam cake is shut, and when loam cake was opened, CD-ROM device must stop the rotation of its spindle motor, guaranteed safety.

Usually, CD-ROM device is used a kind of open-close detection apparatus, in order to detecting the state of opening or closing of loam cake, and produces the relevant detection signal, thus CD-ROM device according to the rotation of this detection signal control spindle motor with stop.

The open-close detection apparatus of existing CD-ROM device comprises magnet and magnetic detection switch, and wherein the magnetic detection switch is magnetic reed switch or Hall element, and magnet and magnetic detection switch place respectively on loam cake and the main body.When loam cake opens or closes, magnet changes in the magnetic field intensity at magnetic detection switch place, thereby the magnetic detection switch sends the corresponding strength detection signal, by subsequent conditioning circuit the intensity detection signal of gained is handled obtaining loam cake and be in the state that opens or closes with respect to main body again.

This CD-ROM device has used magnet and magnetic detection switch as open-close detection apparatus, though can judge that loam cake is in the state of opening or closing, but it has used elements such as magnet and magnetic detection switch, but also needs the cooperation of subsequent conditioning circuit, and structure is comparatively complicated.

The utility model content

In view of this, be necessary to provide a kind of flip pick-up unit of simple structure.

A kind of flip pick-up unit comprises flip, pedestal and probe unit.Described probe unit comprises rotation section and detector switch, and described rotation section is located in the described flip, and described rotation section comprises axis of a cylinder, and described axis of a cylinder is sheathed in the axle sleeve on the described pedestal.Described detector switch is located at the corresponding position in inside and described rotation section of described pedestal.Described rotation section with described flip relative to described pedestal rotate be in be contained in the described pedestal and with described detector switch offset contact and stretch out outside the described pedestal and with the described detector switch two states that do not contact.

The rotation section of above-mentioned flip pick-up unit by in pedestal and flip, detector switch being set respectively and being used to trigger this detector switch, it can directly obtain the unlatching or the shutdown signal of the relative main body of flip, and structure is simplified.

Description of drawings

Fig. 1 is the structural representation of the flip pick-up unit of better embodiment.

Fig. 2 is the exploded view of flip pick-up unit shown in Figure 1.

Fig. 3 is the structural representation of the rotation section of flip pick-up unit shown in Figure 2.

Structural representation when Fig. 4 is in open mode for the flip of flip pick-up unit.

Fig. 5 is that the flip of flip pick-up unit is in the structural representation when shutting state.

Embodiment

Figure 1 shows that the structural representation of the flip pick-up unit of better embodiment.This flip pick-up unit 20 comprises flip 22, pedestal 24, rotating shaft 26 and probe unit 28 etc.Flip 22 is connected by rotating shaft 26 with pedestal 24, thereby flip 22 can serve as that axle rotates with rotating shaft 26 relative to pedestal 24.Probe unit 28 is located at the intersection of flip 22 and pedestal 24, in order to detect the state that opens or closes of flip 22 relative pedestals 24.

Fig. 2 is the exploded view of probe unit 28 shown in Figure 1.This probe unit 28 comprises rotation section 282 and first, second detector switch 284,286 etc.Rotation section 282 is located in the flip 22, and by being located at the inside that opening 322 on the pedestal 24 extend into pedestal 24.First, second detector switch 284,286 is installed in pedestal 24 inside.First, second detector switch 284,286 can be triggered relative to rotating of pedestal 24 with flip 22 in rotation section 282, so that it produces the relevant detection signal.

Fig. 3 is the structural representation of the rotation section 282 of probe unit 28 shown in Figure 2, and Fig. 4 is the outboard profile of probe unit 28 shown in Figure 2.As shown in Figure 3, rotation section 282 comprises first top 292, second top 294 and axis of a cylinder 296.First top 292 and second top 294 are along the axial array of rotating shaft 26, and it is respectively applied for and triggers first, second detector switch 284,286.Axis of a cylinder 296 and flip 22 almost parallels, its and rotating shaft 26 coaxial settings, and link to each other with first, second top 292,294, thereby first,

second top

292 and 294 can serve as a rotation with axis of a cylinder 296.As shown in Figure 4, probe unit 28 also comprises the axle sleeve of being located on the pedestal 24 324, axis of a cylinder 296 passes the opening 322 (referring to Fig. 2) on the pedestal 24 and extend into the inside of pedestal 24, and is sheathed in the axle sleeve 324, thereby rotation section 282 can be rotated around axis of a cylinder 296, axle sleeve 324.

First top 292 and second top 294 along stretching out perpendicular to the direction of flip 22, and serve as spool to be the circular arc bending with axis of a cylinder 296 from a side of flip 22.Thereby the sidewall that first, second top 292,294 has circular arc respectively, this circular arc sidewall to be being axle with axis of a cylinder 296, and to be respectively with axis of a cylinder 296 be the segment shape of axle in first, second top 292,294.The pairing central angle difference of two segments, first top, 292 pairing central angles are big slightly than second top, 294 pairing central angles.

Form first, second support surface 306,308 on first, second top 292,294 respectively, first, second support surface 306,308 is respectively an edge grain of each segment, and tangent with axis of a cylinder 296 respectively.

Preferably, first top, 292 pairing central angles are a bit larger tham 90 °, and the central angle of second top, 294 correspondences is slightly smaller than 90 °, thereby, first, second support surface 306,308 all with flip 22 approximate vertical.

In conjunction with Fig. 2 and Fig. 4, first, second detector switch 284,286 comprises first, second thoughts and feelings portion 312,314 and first, second body 316,318 respectively.One end of first, second thoughts and feelings portion 312,314 respectively with first, second body 316,318 Joints; The other end is respectively applied for first top 292, second top 294 of rotation section 282 and offsets and contact, and whether turns to preposition with flip 22 with first, second top 292,294 of sensing.Thereby first, second detector switch 284,286 can detect the rotary state of flip 22 relative pedestals 24, and sends the relevant detection signal.

First, second body 316,318 is contained in the inside of pedestal 24, its along the axial array of axis of a cylinder 296 on pedestal 24.When rotating, axis of a cylinder 296 is being in position successively, first, second detector switch 284,286 setting straggly on direction perpendicular to axial direction corresponding to first support surface 306 and second support surface 308.During perpendicular to the axial rotation of axis of a cylinder 296, its first, second support surface 306,308 is first, second thoughts and feelings portion 312,314 of extruding on direction perpendicular to axial direction thereupon in first, second top 292,294.

Below illustrate that by Fig. 4, Fig. 5 flip 22 relative pedestals 24 are by being opened in the process of closing the structure of probe unit 28 under the residing two states.

As shown in Figure 4, when flip 22 relative pedestals 24 are in open mode, between flip 22, the pedestal 24 at an angle, rotation section 282 reaches pedestal 24 outsides, be in and first, second detector switch 284,286 not contacted positions, thereby first, second detector switch 284,286 can send the signal that expression flip 22 is in open mode.

Figure 5 shows that the structural representation of probe unit 28 when flip 22 relative pedestals 24 are in closed condition.Flip 22 this moment turns to the position with pedestal 24 almost parallels, rotation section 282 turns to the state that is contained in pedestal 24 inside fully thereupon, first support surface 306 of first top, second top 292,294,308 of second support surfaces and pedestal 24 approximate vertical, thus offset and contact with the first thoughts and feelings portion 312, the second thoughts and feelings portion 314 of first detector switch, second detector switch 284,286 respectively.First, second thoughts and feelings portion 312,314 is being parallel to the compressing that is subjected to first, second support surface 306,308 on pedestal 24 and the axial direction perpendicular to axis of a cylinder 296.Flip 22 is in the closed condition signal thereby two detector switches 284,286 that are in pressured state send expression respectively.

When this flip pick-up unit 20 is used for the detection of over cap of CD-ROM device; can carry out such setting to CD-ROM device: have only the rotation that when the detection signal of two detector switches 284,286 represents that all flip 22 has been closed, just starts Spindle Motor; as long as and the detection signal that a detector switch is arranged represents that flip 22 is opened, promptly stop the rotation of Spindle Motor.Can guarantee effectively that like this motor only just rotates when flip 22 is closed, the motor of avoiding occurring high speed rotating can not get hiding and the danger that may cause, make flip detect more effective, stablize.

The rotation section of above-mentioned flip pick-up unit by in pedestal and flip, detector switch being set respectively and being used to trigger this detector switch, it can directly obtain corresponding start signal or shutdown signal in flip when pedestal rotates, and structure is simplified.

Claims

1. flip pick-up unit, comprise flip, pedestal and probe unit, described probe unit comprises rotation section and detector switch, described rotation section is located in the described flip, it is characterized in that: described rotation section comprises axis of a cylinder, described axis of a cylinder is sheathed in the axle sleeve on the described pedestal, described detector switch is located at the corresponding position in inside and described rotation section of described pedestal, described rotation section with described flip relative to described pedestal rotate be in be contained in the described pedestal and with described detector switch offset contact and stretch out outside the described pedestal and with the described detector switch two states that do not contact.

2. flip pick-up unit as claimed in claim 1 is characterized in that: described axis of a cylinder and described flip be arranged in parallel.

3. flip pick-up unit as claimed in claim 1, it is characterized in that: described flip pick-up unit also comprises rotating shaft, described flip is connected by described rotating shaft with described pedestal, and can serve as that axle relatively rotates described rotating shaft and the coaxial setting of described axis of a cylinder with described rotating shaft.

4. flip pick-up unit as claimed in claim 1 is characterized in that: described rotation section has the circular arc sidewall, and described circular arc sidewall is an axle with described axis of a cylinder.

5. flip pick-up unit as claimed in claim 1, it is characterized in that: described flip pick-up unit comprises two detector switches, described rotation section comprises two tops, and described two tops can be triggered described two detector switches state detection signal that rotates respectively.

6. flip pick-up unit as claimed in claim 5 is characterized in that: described two tops are along the axial array setting of described axis of a cylinder, and all link to each other with described top.

7. flip pick-up unit as claimed in claim 5 is characterized in that: it is the segment shape of axle that described two tops are with described axis of a cylinder.

8. flip pick-up unit as claimed in claim 5 is characterized in that: described two tops comprise the support surface respectively, are the predetermined angular setting between described two support surfaces.

9. flip pick-up unit as claimed in claim 5 is characterized in that: described two tops have the circular arc sidewall respectively, and described two circular arc sidewalls are axle with described axis of a cylinder all.

10. flip pick-up unit as claimed in claim 9 is characterized in that: the corresponding different central angle of described two circular arc sidewalls.