CN2145601Y - Blind person's walking stick - Google Patents
Blind person's walking stick Download PDFInfo
- Publication number
- CN2145601Y CN2145601Y CN 92215900 CN92215900U CN2145601Y CN 2145601 Y CN2145601 Y CN 2145601Y CN 92215900 CN92215900 CN 92215900 CN 92215900 U CN92215900 U CN 92215900U CN 2145601 Y CN2145601 Y CN 2145601Y
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- walking stick
- signal
- circuit
- driving device
- alarm
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- Burglar Alarm Systems (AREA)
Abstract
The utility model aims to provide a blind person's walking stick which conforms to the walking habit and the living characteristic of the blind person and is provided with multi-aspect functions. The blind person's walking stick of the utility model forms detection signals to control the a vibration alarm device to give out vibration alarm by sending out the infrared light and receiving the infrared light reflected from the front obstacle. The alarm device also comprises an audible alarm device which can generate audible alarm when someone passes in front of the blind person's walking stick and be concurrently used as a burglar alarm device. The bottom of the walking stick is provided with a ponded water contact point which can generate audible alarm to ponded water. The power supply device adopts the chargeable direct current power supply.
Description
This utility model relates to a kind of bland person walking stick, the bland person walking stick with many-sided function of the particularly a kind of blind person's of meeting walking along the street custom and life characteristic.
At present, the blind person adopts path-exploring stick as the walking along the street aid usually.This path-exploring stick is only run into the barrier on the road, and the blind person can feel to some extent that just this is very inconvenient for blind person's walking along the street.In addition, in some occasion, for example be parked in the truck in roadside, because vehicle body is outwards to protrude on higher position thereafter, thereby the path-exploring stick that the blind person now uses generally can't run into, and the head that the blind person will be taken place like this bumps against the situation of back vehicle body.For this simple path-exploring stick, people are installed all kinds of detection alarm devices that can remind the blind person in advance to the barrier in the certain space scope by the mode of audible alarm thereon additional.Although this acoustic alarm path-exploring stick can prevent the generation of above-mentioned situation.But it is still satisfied inadequately concerning the blind person.This is because blind person's walking along the street at ordinary times and life are mainly differentiated extraneous circumstance and understood external information by audition.Yet attention that the audible alarm that this class acoustic alarm path-exploring stick sends constantly can disperse blind person's audition has hindered their understanding to external information.Also have a kind of Glasses for blind person in addition, but because the blind person has a rod when getting used to walking along the street, only be with this glasses and do not have a rod, the blind person thinks there is not the security with regard to always feeling to have lacked a kind of support.Moreover when having barrier forwardly, also send by this glasses alarm sound, the attention of disperseing blind person's audition equally, and it is limited that it detects spatial dimension in addition, and the blockage that exceeds for the underfooting, hydrops etc. just can't be reported to the police.
The purpose of this utility model is to address the above problem, but provides a kind of blind person's of meeting walking along the street custom and life characteristic, can make the bland person walking stick that perception is reported to the police with mode of vibration for external world situation.
Another purpose of the present utility model is to provide a kind of bland person walking stick that is also used as burglar alarm in the blind person family.
Another purpose of the present utility model is to provide a kind of bland person walking stick that can make warning to the hydrops on ground.
A purpose more of the present utility model is to provide a kind of inside that charging device is housed can be to the bland person walking stick of chargeable battery charging.
Bland person walking stick of the present utility model comprises checkout gear, warning driving device, alarm device and supply unit, when described supply unit is in running order, described checkout gear response external world situation output detection signal is controlled described warning driving device, described warning driving device drives described alarm device according to described detection signal generation driving signal and sends the perceivable warning of blind person, wherein said alarm device involving vibrations alarm device, this vibration alarming device sends described perceivable warning in the mode of vibration.
Bland person walking stick of the present utility model, wherein said checkout gear comprises: be located at least one emitter window and at least one receiver window on the described cane body, be located at least one emitter and at least one receptor in described emitter window and the receiver window respectively; Offering the described emitter emission signal of telecommunication makes this emitter launch the radiating circuit that transmits; To change into the receiving circuit that receives signal of telecommunication output from the reflected signal of extraneous reflected back by receptor; Amplify the amplifying circuit of the described reception signal of telecommunication; The electrical signal conversion of described amplifying circuit output is become the signaling conversion circuit of level; The comparison circuit that the described level and the predefined level of described signaling conversion circuit output compared output.
Bland person walking stick described in the utility model, wherein said alarm device and warning driving device also comprise audible alarm unit and audible alarm driving device respectively, described walking stick also is provided with change-over switch.
Bland person walking stick of the present utility model, wherein said checkout gear also comprise and are arranged on the walking stick bottom and export the hydrops contact of corresponding level to the driving device of reporting to the police when the conducting of contact.
The change-over switch that bland person walking stick of the present utility model, wherein said supply unit comprise chargeable dc source, charging circuit and be used to switch described supply unit duty or charged state.
Aforesaid bland person walking stick, owing to taken into full account blind person's walking along the street custom and life characteristic, still adopt the walking stick that is similar to path-exploring stick, and replacing audible alarm unit as main warning means with the vibration alarming device, the audition that makes the blind person can make full use of them is differentiated extraneous circumstance and is promoted understanding to external information.
Aforesaid bland person walking stick, owing to be to launch to transmit and receive reflected signal, the signal of telecommunication that received amplified convert level to,, thereby can alarm in advance the barrier in a certain spatial dimension by comparison circuit back control warning driving device relatively.This detection alarm device has remedied the main deficiency of simple path-exploring stick, can the function that correspond to actual needs most is provided for conscientiously blind person's walking along the street.
Aforesaid bland person walking stick, owing to also comprise audible alarm unit, audible alarm driving device and change-over switch, thereby the blind person makes the detection signal of described checkout gear export to described audible alarm driving device by this change-over switch at home the time, just can drive audible alarm unit and report to the police, but thereby the burglar alarm among the dual-purpose writer also.
Aforesaid bland person walking stick, owing to have the hydrops contact that is arranged at the walking stick bottom in the checkout gear, this contact conducting promptly causes warning, so can remind blind person ground that hydrops is arranged.
Aforesaid bland person walking stick, because supply unit has comprised chargeable dc source, charging circuit and has been used to switch the duty of described supply unit or the change-over switch of charged state, thereby the blind person need not to change frequently battery, and makes the blind person feel to use easily.
Aforesaid bland person walking stick, reflective veneer is posted on its surface, night is when car bulb or other rayed during to walking stick, whole walking stick will luminous prompting others note.
Below in conjunction with drawings and Examples this utility model is described in further detail, by narration, various advantages of the present utility model and effect will be clearer.
Fig. 1 is the schematic block diagram of the circuit part of this utility model bland person walking stick.
Fig. 2 is the more detailed block diagram of the circuit part of this utility model bland person walking stick.
Fig. 3 is the circuit diagram of the circuit part of this utility model preferred embodiment.
Fig. 4 is the sketch map of composition of an embodiment of bland person walking stick of the present utility model.
Referring to Fig. 1, bland person walking stick circuit part of the present utility model comprises checkout gear 10, warning driving device 20, alarm device 30 and supply unit 40.When supply unit 40 is in running order, for each device provides running voltage.10 responses of checkout gear external world situation output detection signal control warning driving device 20, this warning driving device 20 produces according to this detection signal and drives signal and drive alarm device 30 and send warning, and this alarm device 30 includes and sends the blind person with mode of vibration and can feel the vibration alarming device 30A that reports to the police.
Here, checkout gear can be provided the warning of vibration mode corresponding to different extraneous circumstances to the blind person by the vibration alarming device, for example when blind person's walking along the street, can send vibration alarming, also can send vibration alarming the hydrops on ground to their barrier of health the place ahead certain space, or the like.A kind of warning meeting takes place comparatively continually before when walking along the street, provides vibration alarming so an embodiment of the present utility model just is mainly this situation.Thereby in this embodiment, as shown in Figure 2, checkout gear 10 comprises radiating circuit 11, emitter 12, receptor 13, receiving circuit 14, amplifying circuit 15, signaling conversion circuit 16 and comparison circuit 17.Radiating circuit 11 provides the emission signal of telecommunication to emitter 12.Emitter 12 will launch that electrical signal conversion becomes to transmit and outwards emission.Generally transmit and be ultrasonic signal or infrared signal.This transmits and becomes reflected signal through extraneous reflection, converts the reception signal of telecommunication to by receptor 13 receptions and with it.This reception signal of telecommunication amplifies through amplifying circuit 15 delivers to signaling conversion circuit 16.The reception signal of telecommunication that amplifies converts level to by signaling conversion circuit 16 and delivers to comparison circuit 17.In comparison circuit 17, this level and predefined comparative level are compared the output detection signal level.This detection signal is sent to warning driving device 20, controls warning driving device 20 and produces the driving signal to drive the warning that vibration alarming device 30A sends vibration mode.
In the checkout gear 10 of this embodiment, when emitter 12 and receptor 13 are respectively ultrasonic transducer, then emitter 12 emissions transmit and reflected signal that receptor receives is ultrasonic signal.And when emitter 12 and receptor 13 are infrared light emitting diode and infrared light reception diode respectively, then transmit and reflected signal is infrared signal.
The radiating circuit 11 of checkout gear 10 can comprise transmitter unit 11B.The emission signal of telecommunication is regulated by each blocked resistance among the transmitter unit 11B, is added to the size of the emission signal of telecommunication on the emitter 12 by adjusting, regulates the transmit signal strength of being launched by emitter 12, determines the spatial dimension that checkout gear 10 will detect.
For the power consumption that reduces emitter 12 with prolong its service life, and prevent the interference of extraneous detection signal, radiating circuit 11 also can comprise modulating unit 11A.The emission signal of telecommunication of modulating unit 11A modulation high frequency is given transmitter unit 11B and is launched.And the amplifying circuit 15 of receiving terminal comprises that a tuning amplifying unit 15A amplifies as afterbody, owing in tuning amplifying unit 15A, can obtain relative high gain with the reception signal of telecommunication of this high-frequency emission signal of telecommunication corresponding frequencies, thereby export to signaling conversion circuit 16 and comparison circuit 17 obtains detection signal through the reception signal of telecommunication of tuning amplification, just can reduce the suffered external interference of detection signal, improve its signal to noise ratio.
Alarm device 30 can also comprise audible alarm unit 30B and audible alarm driving device 20B respectively with warning driving device 20.In addition, by being set, change-over switch 52 comes being connected of change detection signal output and audible alarm driving device 20B or vibration alarming driving device 20A.When switching to the former, detection signal output is connected, checkout gear 10 can detect the target in the certain space scope (for example detecting spatial people through this), and by the audible alarm unit 30B warning of sounding, bland person walking stick also just can be used as the burglar alarm in the blind person family like this.
As shown in Figure 2, audible alarm driving device 20B comprises oscillating circuit 23, by the detection signal of checkout gear 10 output directly control oscillation circuit 23 produce oscillator signals and give audible alarm unit 30B and make it warning as driving signal.In addition, audible alarm driving device 20B also can comprise a timing circuit 21, the detection signal control timing circuit 21 of checkout gear 10 outputs produces timing signal and comes control oscillation circuit 23 to produce oscillator signal, the sustainable certain hour of audible alarm of audible alarm unit 30B is overturn until timing signal, make the oscillating circuit failure of oscillation, thereby can cause blind person's attention.In addition, also can comprise a comparator 22 between timing circuit 21 and oscillating circuit 23, this comparator 22 will compare timing signal and preset level, and when the timing signal level overturn, comparator 22 outputs made the level of oscillating circuit 23 failure of oscillations.
For making audible alarm unit 30B obtain frequency response preferably, the audible alarm driving device can also comprise modulates back output drives signal as audible alarm modulation circuit 24 to the oscillator signal of oscillating circuit 23 outputs.
Checkout gear 10 can also comprise the hydrops contact, and the contact level during its conducting can be delivered to comparator 22, makes the level triggers oscillating circuit 23 of these comparator 22 outputs produce vibration.
Referring to Fig. 3, the circuit to the circuit part of the preferred embodiment of bland person walking stick of the present utility model describes below.
What Fig. 3 (a) illustrated is the circuit of the infrared light radiating portion of checkout gear 10, and it comprises two-stage modulating unit 11A1,11A2; Transmitter unit 11B and infrared light emitting diode 120.Wherein, first order modulating unit 11A1 is made of two 4011 NAND gate and the input and the resistance between output terminals A, diode and the charge and discharge capacitance that are connected two 4011 NAND gate.4011 NAND gate inside are added with the running voltage (not shown), thereby hold the square-wave signal of exporting certain frequency at A, and this square wave frequency is the repetition rate of gap emission infrared light.Second level modulating unit 11A2 is equally by two NAND gate be connected the input of two 4011 NAND gate and the resistance between the outfan and charge and discharge capacitance constitute.By choosing suitable resistance, electric capacity can be the pulse signal of envelope with this square-wave signal to modulating output again from the square-wave signal of NAND gate one input input by the pulse of upper frequency (for example being 20KC) just.Be sent to transmitter unit 11B and amplify through the synthetic signal of telecommunication of secondary like this and drive three infrared light transmitting tubes 120 that are connected between colelctor electrode and power supply and launch the infrared light pulse signal with gap by wherein compound transistor.Above-mentioned two-stage modulation has can reduce power consumption, strengthen the electrical signal intensity that is added on the infrared light transmitting tube 120, and many-sided advantages such as service life that can prolong infrared light transmitting tube 120.Moreover, also can be by reducing outer signals to receiving the interference of the signal of telecommunication in the transmitting terminal modulation and in the tuning reception of receiving terminal.In addition, the emitter-base bandgap grading of compound transistor is connected to third gear resistance changes the emission current that flows through on the transmitting tube 120 with the scope corresponding to the required emission of infrared light size by change-over switch in above-mentioned transmitter unit.Obviously, bigger resistance is corresponding to short range, and is intermediary then corresponding to moderate distance, and less corresponding to larger distance.Here be provided with the change-over switch K that is used to switch this third gear resistance
2
What Fig. 3 (b) illustrated is infrared light receiving unit and signal processing and the vibration alarming driving device 20A and the vibration alarming device of checkout gear 10.Constitute receptor 13 by three infrared light reception diodes 130 are parallel with one another.Pass through the two-stage voltage amplification again by delivering to signaling conversion circuit 16 after the tuning amplification of one-level by the received current signal of receiving circuit 14 outputs is first in amplifying circuit 15.Certainly the tuned frequency of tuning amplifier stage should be corresponding with the carrier frequency that transmits here.The received current signal is converted into level output and gives comparison circuit 17 in signaling conversion circuit 16.In comparison circuit 17 with this level with make comparisons by the comparative level of potentiometer setting in advance, be higher than comparative level with regard to output low level as detection signal.Low level makes the compound transistor conducting among the vibration alarming driving device 20A, drives micromachine 61 by the electric current between this compound transistor colelctor electrode and the ground and rotates.In addition, also comprise the change-over switch K that switches the bland person walking stick working method here
1Wherein, the B end is that detection signal is given the state that the B end sends vibration alarming for the alarm condition of " walking along the street " mode; The C end is that detection signal is given C end (referring to Fig. 3 (c)) alarm condition of sounding for the alarm condition of " antitheft " mode; The D end then is a free end, and interlock D ' end then is the off state of dc source or has connected the charged state behind the charger for " charging is closed " state.
What Fig. 3 (c) illustrated is the circuit of audible alarm driving device 20B and audible alarm unit 30B.Work as K
1When getting to the C end, low level detection signal just triggers the bistable circuit of timing circuit 21, makes its outfan E output high level, and this high level triggers the monostable circuit output low level and keeps upset again about about 20S, thus the time action of playing.The low level of monostable circuit output is delivered to relatively back output zero of comparator 22, the oscillator signal that it is 0.5S that control oscillation circuit 23 makes its starting of oscillation output cycle; And when the level of monostable circuit output overturns, will make oscillating circuit 23 failure of oscillations.Because audible alarm unit 30B is the news Chinese percussion instrument, and the news Chinese percussion instrument has frequency response preferably at 2KC.Thereby between oscillating circuit 23 and audible alarm unit 30B, added one-level modulation circuit 24, making the pulse signal of 2KC be modulated and become with this oscillator signal by oscillator signal is the 2KC pulse signal of envelope, and this signal is sent to audible alarm unit 30B and drives the news Chinese percussion instrument.In addition, be connected to hydrops contact F-F ' on the input F of comparator 22, when the contact runs into hydrops, F-F ' can make comparator be output as zero with regard to the conducting output low level equally, and the news Chinese percussion instrument sends warning.
The composition of the schematically illustrated walking stick of Fig. 4, what it comprised elongated cane body 60 and portion disposed thereon holds part 59.Hold part the micromachine 61 that is used for vibration alarming is installed, " walking along the street/antitheft/pass charging " third gear is switched change-over switch K
1, " far away/in/near " third gear change-over switch K
2, and charging socket 62.Eccentric component (for example copper billet) is housed in the rotating shaft of this micromachine 61, and this just can make holds part 59 generation vibration when micromachine 61 rotates, and hands just can be felt to draw like this.Here adopt other vibrating device also to be fine.In addition, as long as can feeling other parts that this micromachine is contained in walking stick, the blind person also is fine.Be provided with an emitter window 63 in the middle of the cane body, the inside is provided with respectively the infrared light of upwards the place ahead, dead ahead and front lower place emission and penetrates pipe 120.Be respectively equipped with receiver window 64 in the upper, middle and lower of cane body, each receiver window is provided with an infrared light receiving tube 130.Be provided with hydrops contact 65 in cane body bottom.The chargeable dc source of supply unit 40 can be a nickel-cadmium cell, and it can be arranged on the intravital proper site of walking stick together with charging circuit.The circuit part that comprises checkout gear 10, warning driving device 20 and alarm device 30 can be assembled into circuit board 66, also can be arranged at the intravital proper site of cane.In addition, post reflective veneer on the outer surface of this cane body 60, or adopt surface with fluorescent color.
Should be appreciated that the foregoing description right and wrong are determinate, protection domain of the present utility model should be determined by claims of the present utility model.
Claims (12)
1, a kind of bland person walking stick comprises checkout gear, the warning driving device, alarm device and supply unit, when described supply unit is in running order, described checkout gear response external world situation output detection signal is controlled described warning driving device, described warning driving device drives described alarm device according to described detection signal generation driving signal and sends the perceivable warning of blind person, it is characterized in that described alarm device comprises the vibrative vibration alarming device of a described driving signal of response, this vibration alarming device comprises that one is equipped with the micromachine of eccentric component in its rotating shaft.
2, bland person walking stick as claimed in claim 1 is characterized in that described vibration alarming device is arranged on the part of holding of described walking stick.
3, bland person walking stick as claimed in claim 1 is characterized in that described checkout gear comprises: be located at least one emitter window and at least one receiver window on the described walking stick; Be located at least one emitter and at least one receptor of described emitter window and receiver window respectively; Offer the radiating circuit of the described emitter emission signal of telecommunication; To change into the receiving circuit that receives signal of telecommunication output from the reflected signal of extraneous reflected back by receptor; Amplify the amplifying circuit of the described signal of telecommunication that receives; The electrical signal conversion of described amplifying circuit output is become the signaling conversion circuit of level; The comparison circuit that the described level and the predefined level of described signaling conversion circuit output compared output.
4, bland person walking stick as claimed in claim 3 is characterized in that described checkout gear comprises: the receptor in three receiver windows of three upper, middle and lowers that are separately positioned on described walking stick; In the emitter window of three middle parts that are arranged on described walking stick together respectively to front upper place, dead ahead and the described emitter that transmits of front lower place emission.
5,, it is characterized in that described receptor and emitter are respectively infrared receiving diode and infrared-emitting diode as claim 3 or 4 described bland person walking sticks.
6, bland person walking stick as claimed in claim 5, it is characterized in that described radiating circuit also comprises is modulated into the modulating unit of the pulse signal in gap with the emission signal of telecommunication, described amplifying circuit also comprise make described amplifying circuit output the signal of telecommunication be tuned to tuning amplifying unit on the pulse frequency of pulse signal in described gap.
7, bland person walking stick as claimed in claim 6 is characterized in that described radiating circuit also comprises having a plurality of resistance that switched by change-over switch that the emission signal of telecommunication size that flows through on the described infrared-emitting diode is regulated and the infrared light transmitter unit of the light intensity of the infrared light pulse launched of adjusting play by this.
8, bland person walking stick as claimed in claim 6, it is characterized in that described alarm device and warning driving device also comprise audible alarm unit and corresponding audible alarm driving device respectively, described walking stick also is provided with the change-over switch in order to be connected between change detection Device Testing signal and vibration alarming driving device or the audible alarm driving device.
9, bland person walking stick as claimed in claim 8, it is characterized in that described audible alarm driving device comprises that also the upset level of this timing circuit output triggers audible alarm unit as the described alarm level of answering by the detection signal control of described checkout gear output and the timing circuit that its output level is overturn later at the maintenance certain hour.
10, bland person walking stick as claimed in claim 9, it is characterized in that also being connected to a comparator at the outfan of described checkout gear, described checkout gear also comprises and is arranged on the walking stick bottom and exports the hydrops contact that corresponding level is given described comparator when the conducting of contact.
11, as claim 1 or 3 or 8 or 10 described warnings, it is characterized in that the change-over switch that described supply unit comprises chargeable dc source, charging circuit and is used to switch described supply unit duty or charged state.
12, as claim 1 or 3 or 8 or 10 described bland person walking sticks, it is characterized in that described walking stick posts reflective veneer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92215900 CN2145601Y (en) | 1992-07-20 | 1992-07-20 | Blind person's walking stick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92215900 CN2145601Y (en) | 1992-07-20 | 1992-07-20 | Blind person's walking stick |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2145601Y true CN2145601Y (en) | 1993-11-10 |
Family
ID=33764273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92215900 Expired - Fee Related CN2145601Y (en) | 1992-07-20 | 1992-07-20 | Blind person's walking stick |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2145601Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100394751C (en) * | 2004-09-01 | 2008-06-11 | 乐金电子(中国)研究开发中心有限公司 | Barrier detection device of mobile communication terminal and method |
| US7504791B2 (en) | 2004-01-22 | 2009-03-17 | Robert Bosch Gmbh | Electric power tool with optimized operating range |
| CN103637901A (en) * | 2013-12-27 | 2014-03-19 | 哈尔滨工业大学 | Blind guide crutch based on ultrasonic ranging |
| CN105495893A (en) * | 2015-12-03 | 2016-04-20 | 北京百乐途户外用品有限公司 | Intelligent anti-lost umbrella and intelligent anti-lost device |
| CN106963606A (en) * | 2017-05-02 | 2017-07-21 | 姚笈 | A kind of novel intelligent blind-guiding stick |
| CN109907947A (en) * | 2019-05-07 | 2019-06-21 | 深圳市南山区月亮湾小学 | A kind of disabled person's routing device that can be sounded an alarm |
| CN111012013A (en) * | 2020-01-21 | 2020-04-17 | 张小林 | Old walking stick umbrella with instant music |
-
1992
- 1992-07-20 CN CN 92215900 patent/CN2145601Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7504791B2 (en) | 2004-01-22 | 2009-03-17 | Robert Bosch Gmbh | Electric power tool with optimized operating range |
| CN100394751C (en) * | 2004-09-01 | 2008-06-11 | 乐金电子(中国)研究开发中心有限公司 | Barrier detection device of mobile communication terminal and method |
| CN103637901A (en) * | 2013-12-27 | 2014-03-19 | 哈尔滨工业大学 | Blind guide crutch based on ultrasonic ranging |
| CN105495893A (en) * | 2015-12-03 | 2016-04-20 | 北京百乐途户外用品有限公司 | Intelligent anti-lost umbrella and intelligent anti-lost device |
| CN105495893B (en) * | 2015-12-03 | 2016-08-31 | 北京百乐途户外用品有限公司 | Intelligent lost-proof type umbrella and Intelligent loss-proof device |
| CN106963606A (en) * | 2017-05-02 | 2017-07-21 | 姚笈 | A kind of novel intelligent blind-guiding stick |
| CN109907947A (en) * | 2019-05-07 | 2019-06-21 | 深圳市南山区月亮湾小学 | A kind of disabled person's routing device that can be sounded an alarm |
| CN111012013A (en) * | 2020-01-21 | 2020-04-17 | 张小林 | Old walking stick umbrella with instant music |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |