CN101929878B

CN101929878B - Waterproof coding device

Info

Publication number: CN101929878B
Application number: CN2009101082188A
Authority: CN
Inventors: 丘守庆; 许申生; 马艳明
Original assignee: Shenzhen CHK Technology Co Ltd
Current assignee: Xin Huike limited company of Shenzhen
Priority date: 2009-06-19
Filing date: 2009-06-19
Publication date: 2012-06-13
Anticipated expiration: 2029-06-19
Also published as: CN101929878A

Abstract

A waterproof coding device comprises a knob, an inductive switch board and an installing and locating assembly, wherein the knob comprises a cover body and a plurality of circularly arranged magnets fixedly arranged in the cover body; the inductive switch board is positioned below the knob; the inductive switch board is provided with an installing hole and two Hall elements; the installing and locating assembly comprises shaft sleeves with locating convex plates at one end and a shaft; the shaft sleeves are connected with a lock sleeve after running through the installing hole of the inductive switch board and an enclosure; the locating convex plates of the shaft sleeves are provided with an assembling cavity inside; a waterproof cover is installed at the entrance of the assembling cavity; and one end of the shaft is fixedly connected with the knob and the other end thereof is positioned in the assembling cavity of the shaft sleeves and is provided with clamp rings. The coding device has simple structure and low cost and is convenient to process and assemble. Besides, the coding device can safely and stably work in the humid environment or the environment in which water is sprayed. The coding device is further provided with a knob locating mechanism, thus ensuring the knob not to turn with low amplitude when being vibrated.

Description

Waterproof coding device

Technical field

The present invention relates to code device, particularly a kind of waterproof coding device that angular displacement is converted to the encode digitalized electric signal.

Background technology

Code device is a kind of sensor device that converts angular displacement or linear displacement signal to the encode digitalized electric signal.The former is called code-disc, and the latter is called yardstick.Can be divided into contact and contactless two kinds according to the playback mode code device.Contact adopts brush output, representes that with brush contact conduction region or insulation layer the state of code is " 1 " or " 0 "; The contactless sensitive element of accepting is light activated element or magneto sensor, representes that with photic zone and light tight district the state of code is " 1 " or " 0 " when adopting light activated element; Represent code status with the variation of induced field when adopting magneto sensor.Code device is widely used in industry control location, tachometric survey, power adjustments etc.There is following shortcoming in existing code device:

Photo-electric: the position of installation needs transparent glass material, and is non-watertight, resistant, cost are not high.

Mechanical type: directly realize switch by Metal Contact, non-watertight, and easy conductive.Metal Contact is arranged, no isolation features.On the electrical equipment in places such as some kitchens, bathroom, use dangerous.

Induction: realize switch by unshakable in one's determination and telefault, cost is high.

Summary of the invention

The purpose of this invention is to provide a kind of simple in structure, waterproof coding device that cost is low, make code device moist or have in the environment of water spray and also can work safely and steadly.

In order to achieve the above object, waterproof coding device of the present invention comprises:

A knob, it comprises a lid and is installed in some magnets of arranging in the form of a ring in this lid;

An inductive switch plate; Be positioned at the knob downside, a mounting hole and two Hall elements be set, during turning knob on the inductive switch plate; The magnetic field of all magnets of knob can penetrate said two Hall elements, makes the pulse code signal of two Hall element output expression knobs angular displacement; And

The installing and locating assembly; Comprise that an end is provided with the axle sleeve of positioning boss, the other end that is connected axle sleeve be used for cooperating with said positioning boss with the inductive switch plate be fixed on the inboard lock sleeve of casing and be used for cooperating with said axle sleeve with knob be supported in the casing outside spool; The positioning boss of axle sleeve is arranged in the casing; Axle sleeve connects said lock sleeve after running through mounting hole and the casing of inductive switch plate, establishes assembly cavity in the positioning boss of axle sleeve, and the assembly cavity oral area is installed waterproof cover; Said axle one end and said knob are affixed, and the other end is positioned at the assembly cavity of axle sleeve and in this end snap ring is set.

The present invention further also can comprise the knob detent mechanism, and rotation by a small margin takes place knob when preventing that code device from receiving vibration effect.The following structure of the preferential employing of said knob detent mechanism; Comprise: be arranged at the some radial grooves on the said lock sleeve end face; Be arranged at the some prominent point of the inner top surface of said knob lid, and be arranged at the elastomeric element that the inner top surface that is used to make the knob lid on the said axle is pressed to the lock sleeve end face; Under the elastomeric element effect; The prominent point of knob lid inner top surface is embedded in the groove of said lock sleeve end face, makes knob receive when vibrating and can not rotate voluntarily, thereby realizes the location to knob; When with the hand turning knob; Turn-knob is stressed bigger, and the power that can overcome said elastomeric element is deviate from the prominent of knob lid inner top surface from the groove of said lock sleeve end face, thereby knob can be rotated.Described radial groove is meant the groove that is provided with along the diametric(al) of lock sleeve end face.The quantity of groove and position can be provided with according to concrete code device flexibly.

Further also a magnetic guiding loop can be installed above the magnet of said knob, to strengthen magnetoconductivity.

Code device of the present invention utilizes the angular displacement coding of the principle of Hall effect to knob, and is simple in structure, processing, easy to assembly, and cost is low.Its electronic component and circuit all are arranged in the casing; Has only magnet in the knob that exposes; And sealing fully between knob and the casing; Guaranteed that water can not infiltrate the electronic component and the circuit of code device through the knob place, thereby made code device moist or have in the environment of water spray and also can work long service life safely and steadly.

Simultaneously owing to utilize Hall effect to realize coding, make code device knob, installing and locating assembly and use the casing of the equipment of this code device all can adopt plastics to process, realized the isolation with internal circuit fully, safe in utilization.Overcome existing machinery formula code device and directly realized switch by Metal Contact; On the electrical equipment in places such as kitchen, bathroom, use unsafe defective, and existing photo-electric code device requirement installation site is that transparent material causes not resistant, defect of high cost.

In addition, it is provided with the knob detent mechanism, can effectively solve knob and vibrated the problem of rotating by a small margin that is easy to generate.

Description of drawings

Fig. 1 is the structural representation of embodiment waterproof coding device, and wherein 100 is the casing that the equipment of this code device is installed, and does not belong to the structure of this code device;

Fig. 2 is the cut-open view along the A-A direction;

Fig. 3 is the magnetic pole distribution schematic diagram of its knob inner magnet;

Fig. 4 is the distribution schematic diagram of its two Hall elements;

Fig. 5 is the oscillogram of its two hall element output signals.

Embodiment

With reference to Fig. 1-2, this waterproof coding device comprises: knob 1, an inductive switch plate 2 and an installing and locating assembly 3.

Knob 1 comprises a lid 11 and is installed in some magnets 12 of arranging in the form of a ring in this lid 11.

Inductive switch plate 2 is positioned at knob 1 downside; A mounting hole 21 and two Hall elements 23,23 ' (23 ' is not shown in Fig. 1,2) are set on the inductive switch plate 2; After two Hall elements 23,23 ' position should make that knob 1 revolves three-sixth turn, all magnets 12 of knob 1 all had from two Hall elements 23,23 ' top process, in other words; During turning knob 1, said two Hall elements 23,23 ' are all had an opportunity to penetrate in the magnetic field of all magnets 12 of knob 1.Like this, when turning knob 1, two Hall elements 23,23 ' just can be exported the pulse code signal of expression knob 1 angular displacement.

Installing and locating assembly 3 comprises that an end is provided with axle sleeve 31 and an axle 37 of positioning boss 32; Mounting hole 21 and casing 100 backs that axle sleeve 31 runs through inductive switch plate 2 connect a lock sleeve 38; Establish assembly cavity 33 in the positioning boss 32 of axle sleeve 31; Assembly cavity 33 oral areas are installed waterproof cover 34, and said axle 37 1 ends and said knob 1 are affixed, and the other end is positioned at the assembly cavity 33 of axle sleeve 31 and in this end snap ring 35 is set.

Further comprise the knob detent mechanism, the rotation that knob 1 takes place by a small margin when preventing that code device from receiving vibration effect.Said knob detent mechanism comprises: be arranged at the some radial grooves 38 ' on said lock sleeve 38 upper surfaces; Be arranged at the some prominent point 13 of the inner top surface of said knob 1 lid, and be arranged at the elastomeric element 36 that the inner top surface that is used to make knob 1 lid on the said axle 37 is pressed to lock sleeve 38 upper surfaces; Under elastomeric element 36 effects; Prominent point 13 is embedded in the groove 38 ' of lock sleeve 38 upper surfaces, knob 1 can not be rotated when vibrating receiving voluntarily, thereby realize the location to knob 1; When with hand turning knob 1; Turn-knob 1 is stressed bigger, and the power that can overcome said elastomeric element 36 is deviate from prominent point 13 from the groove 38 ' of lock sleeve 38 upper surfaces, thereby knob 1 can be rotated.In the practical application, can also do some variations to above-mentioned knob detent mechanism, as: make above-mentioned radial groove into concave point.Perhaps with the position of groove and prominent point to falling, groove is located on the knob inner top surface, salient point is located on the lock sleeve upper surface, or the like.

Can also further water proof ring be set, to reach better waterproof effect in the junction of lock sleeve 38 and casing 100.

With reference to Fig. 2 and Fig. 3, a magnetic guiding loop 14 is housed, above the magnet 12 of knob 1 to strengthen magnetoconductivity.Magnetic guiding loop 14 adopts a thin quoit.

Installing and locating assembly 3 comprises that is also proofreaied and correct a packing ring 30, proofreaies and correct packing ring 30 and is sheathed on the axle sleeve 31 and between positioning boss 32 and inductive switch plate 2.Proofreading and correct packing ring 30 makes the above-mentioned waterproof coding device of same size can be installed on the casing 100 of different-thickness.

In the present embodiment, knob 1 has four magnets 12, and they adopt cylindrical magnet steel, and the polarity of adjacent two magnets is opposite, referring to Fig. 3.Two Hall elements 23,23 ' be 45 degree to the vertical line a1 of knob axis a, angle between the a2, referring to Fig. 4.A shown in Figure 5, the oscillogram of two Hall elements 23,23 ' output signal when B two group pulse sequences are respectively turning knob 1 can find out that it not only can become pulse train with the angular transition of knob 1 rotation, can also discern the sense of rotation of knob 1.

Claims

1. a waterproof coding device is characterized in that, comprising:

2. waterproof coding device as claimed in claim 1 is characterized in that also comprising the knob detent mechanism.

3. waterproof coding device as claimed in claim 2 is characterized in that, said knob detent mechanism comprises:

Be arranged at the some radial grooves on the said lock sleeve end face,

Be arranged at the some prominent point of the inner top surface of said knob lid, and

Be arranged at the inner top surface that is used to make the knob lid on the said axle and press to the elastomeric element of lock sleeve end face.

4. like each described waterproof coding device of claim 1-3, it is characterized in that: also comprise a water proof ring, it is arranged on the junction of lock sleeve and casing.

5. like each described waterproof coding device of claim 1-3, it is characterized in that: a magnetic guiding loop further is installed above the magnet of said knob.

6. like each described waterproof coding device of claim 1-3, it is characterized in that: the angle between the vertical line of knob axis of said two Hall elements is 45 degree.

7. like each described waterproof coding device of claim 1-3, it is characterized in that: the polarity of adjacent two magnets of said knob is opposite.