CN111249617A - Intrinsic safety explosion-proof human body static electricity releasing ball - Google Patents
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- 230000029058 respiratory gaseous exchange Effects 0.000 claims description 10
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- 230000005291 magnetic effect Effects 0.000 claims description 6
- 210000002345 respiratory system Anatomy 0.000 claims description 6
- 239000013536 elastomeric material Substances 0.000 claims description 4
- 238000010892 electric spark Methods 0.000 abstract description 8
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- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000008030 elimination Effects 0.000 abstract description 2
- 238000003379 elimination reaction Methods 0.000 abstract description 2
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- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
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- 230000008859 change Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
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- 229910052754 neon Inorganic materials 0.000 description 1
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Abstract
The invention relates to the technical field of human body static electricity discharge elimination, in particular to an intrinsic safety explosion-proof human body static electricity discharge ball. The method is characterized in that: the static electricity releasing ball is connected with the ground, conductive rubber is wrapped on the periphery of the static electricity releasing ball, a gap space is formed between the static electricity releasing ball and the conductive rubber except for a wrapping joint, at least one conductive block is arranged on the conductive rubber, when a hand contacts the conductive rubber wrapped on the periphery of the static electricity releasing ball, static electricity pre-discharging of a human body is carried out, the conductive rubber is further pressed by a hand to compress the gap space until the conductive block contacts with the static electricity releasing ball, and the direct grounding of the human body is realized to complete the complete static electricity releasing of the human body. The beneficial effects are that: no electric spark is generated (or the electric spark is isolated) in the process of releasing the static electricity of the human body, and further no electric shock feeling is generated to the human body.
Description
Technical Field
The invention relates to the technical field of human body static electricity discharge elimination, in particular to an intrinsic safety explosion-proof human body static electricity discharge ball.
Background
The human body static electricity releasing ball is also called as a human body static electricity eliminating ball, and is a human body static electricity releasing product suitable for inflammable, explosive and static electricity preventing places.
However, the existing human body static electricity releasing ball is made of stainless steel, the ball body (the touch ball) is connected with the ground, and the human body static electricity is quickly introduced into the ground after a hand contacts the ball body.
Disclosure of Invention
The intrinsic safety is derived from the GB 3836.4-201 standard, explosion-proof electrical appliances are classified into explosion-proof type, safety-increasing type, intrinsic safety type and the like, and the intrinsic safety type electrical equipment is characterized in that all circuits are intrinsic safety circuits, namely, the circuits cannot ignite specified explosive mixtures due to electric sparks and thermal effects generated under normal work or specified fault states. That is, the electric appliance is not explosion-proof by the outer shell and the filler, but the energy of electric spark or heat effect generated by the circuit in normal use or failure is less than 0.28mJ, namely the gas concentration is 8.5% (the most explosive concentration) of the minimum ignition energy.
The human body electrostatic discharge requires no spark, no electric shock, and no long discharge time, and the human body capacitance is usually a constant value according to Q (electric quantity) = U (voltage) × C (capacitance), I (current) = U (voltage)/R (resistance), and in order to avoid instantaneous discharge, a discharge resistance is provided, i.e. the discharge power P = U is limited2In the case of a constant resistance, the voltage decreases with the decrease in the quantity of electricity, the discharge current decreases, the discharge time increases, and the discharge power decreases rapidly with the square of the voltage (P = U) (/ R)2/R), if a discharge power is defined, the resistance decreases rapidly for a rapid discharge.
According to the time constant T = RC of the discharge, the larger the resistance is, the longer the discharge time is required under the condition of a certain C, and the smaller the resistance is, the larger the discharge power is, and the sparks are easy to generate, so the variable resistance discharge is solved.
The invention aims to avoid electric sparks (or isolate electric sparks) in the process of releasing the static electricity of the human body, further avoid electric shock feeling to the human body and realize quick static electricity release.
The technical scheme of the invention is as follows:
an intrinsic safety explosion-proof human body static electricity release ball is characterized in that: the static electricity releasing ball comprises a static electricity releasing ball connected with the ground, conductive rubber is wrapped on the periphery of the static electricity releasing ball, a gap space is formed between the static electricity releasing ball and the conductive rubber except for a wrapping joint or a jointing surface, at least one conductive block is arranged on the conductive rubber, when the conductive rubber wrapped on the periphery of the static electricity releasing ball is contacted by a hand, human static electricity is pre-discharged, the conductive rubber is further pressed by a hand to compress the gap space until the conductive block is contacted with the static electricity releasing ball to realize direct grounding of a human body to complete static electricity releasing of the human body, and the resistance value of the conductive rubber wrapped on the periphery of the static electricity releasing ball is larger than that of the conductive block.
The intrinsic safety explosion-proof human body static electricity release ball is characterized in that: the conductive block is a low resistance conductive rubber or conductor.
The intrinsic safety explosion-proof human body static electricity release ball is characterized in that: the conductive block is low-resistance conductive rubber, and the resistance value of the conductive block is 0-200 megohms.
The intrinsic safety explosion-proof human body static electricity release ball is characterized in that: the resistance value of the conductive rubber wrapped on the periphery of the static electricity releasing ball is 10 megohm-1000 megohm.
The intrinsic safety explosion-proof human body static electricity release ball is characterized in that: the void space further comprises a second conductive rubber and a conductive block, and pre-discharge is performed for 1 time through the second conductive rubber and the conductive block.
Furthermore, the device also comprises an n-th conductive rubber and a conductive block, and pre-discharge is carried out for n times, wherein n is the number of pre-discharge.
The intrinsic safety explosion-proof human body static electricity release ball is characterized in that: set up the conductive rubber strip of comb shape in the inner chamber of conductive rubber parcel, press when the hand drive during the conductive rubber strip in proper order with electrostatic discharge ball contact, ground resistance constantly reduces when realizing predischarge.
The intrinsic safety explosion-proof human body static electricity release ball is characterized in that: and the indicating lamp string is connected in a loop of the conductive block and the static electricity releasing ball and is used for indicating the contact state of the conductive block and the static electricity releasing ball.
The intrinsic safety explosion-proof human body static electricity release ball is characterized in that: the device also comprises an electrostatic detection device which is used for detecting the electrostatic discharge effect and prompting by sound or light.
The intrinsic safety explosion-proof human body static electricity release ball is characterized in that: mechanical ringing is also included, and the ringing prompts after the static electricity of the human body is released.
The intrinsic safety explosion-proof human body static electricity release ball is characterized in that: the metal elastic sheet is arranged on the static electricity releasing ball or the conductive block and provides tactile feedback or sound feedback.
The invention has the beneficial effects that: no electric spark is generated (or the electric spark is isolated) in the process of releasing the static electricity of the human body, and further no electric shock feeling is generated to the human body.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention.
FIG. 2 is a schematic view of the conductive rubber of the present invention after compression.
Fig. 3 shows an embodiment of the present invention for adding a comb-shaped conductive rubber strip.
FIG. 4 is a circuit diagram of the serial indicator light of the present invention.
Fig. 5 is an embodiment of the present invention for adding mechanical ring alert.
Fig. 6 shows an embodiment of the present invention with 1 additional pre-discharge.
Fig. 7 is an equivalent circuit diagram of the embodiment of fig. 1.
Fig. 8 is an equivalent circuit diagram of the embodiment of fig. 6.
Fig. 9 is a variant embodiment of fig. 1.
Fig. 10 is an embodiment of the present invention to add audible indication or tactile feedback.
Fig. 11 is an embodiment of the present invention employing an electrically conductive permanent magnet contact discharge.
Fig. 12 is another version of the embodiment of fig. 11.
The specific implementation mode is as follows:
the invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic diagram of the apparatus of the present invention. The static electricity releasing ball 101 is made of a conductive material, the periphery of the static electricity releasing ball 101 is wrapped with conductive rubber 102, gap spaces 107 and 106 are formed between the static electricity releasing ball 101 and the conductive rubber 102, the gap is a connecting seam of the conductive rubber wrapping the static electricity releasing ball, the static electricity releasing ball 101 is connected to a support 103, 104 is a base plate, the support 103 and the base plate 104 are made of the conductive material and are connected to the ground, at least one conductive block 105 is arranged on the conductive rubber 102, and the conductive block is made of low-resistance conductive rubber (the resistance value of the conductive block is smaller than that of the conductive rubber, and the resistance smaller than 10 mega ohm in the static electricity field can be regarded as a conductor) or a conductor (such as metal). Fig. 7 is an equivalent circuit diagram of the embodiment of fig. 1, with further reference to fig. 2, and the operation thereof:
① when touching the conductive rubber 102 and the conductive block 105, the static electricity of human body pre-discharges through the connection joint of the conductive rubber 102 and the static electricity releasing ball 101, so that static spark is not generated during touching, and the click feeling of human body discharge is avoided, referring to the equivalent circuit diagram 7, R is the conductive rubber distributed resistance.
At present, a touch ball body made of a sub-conductor material (the industry standard SY/T7354-2017, the resistance is 10-1000 megohms) is adopted, the instantaneous human body static electricity release energy is reduced, the electric shock feeling is reduced, the human body static electricity release time needs to be prolonged, and static electricity carried by a human body cannot be completely released due to the existence of the resistance.
The human body resistance is generally 2 kilo-ohm-20 mega-ohm, the human body static is generally thousands of volts-tens of thousands of volts, the air breakdown field intensity is about 30kV/cm, the electrostatic shock of the finger tip is just caused by air breakdown, if 3000 volts are needed for breakdown according to 1mm, 9000 volts of the human body electrostatic voltage is taken, according to the ohm law, the voltage distributed by the human body does not exceed 3000 volts, and the resistance is 4 kilo-ohm-600 mega-ohm. According to specific tests, the resistance of the conductive rubber is 50-200 megohms, which can meet most conditions (such as 100 megohms). The resistor is the total resistance of electrostatic overcurrent.
②, the conductive rubber 102 and the conductive block 105 are continuously pressed by hand to compress the void space 107 until the conductive block 105 contacts with the static electricity releasing ball 101 to realize the direct grounding of the human body and complete the complete release of the static electricity of the human body, and referring to the equivalent circuit diagram 7, the closing of the switch K is equivalent to the contact conduction of the conductive block 105 and the static electricity releasing ball 101.
③ when the hands are released, the conductive rubber 102 and the conductive block 105 will return under the elasticity of the conductive rubber to wait for the next operation of eliminating the static electricity of human body.
Fig. 3 shows an embodiment of the present invention for adding a comb-shaped conductive rubber strip. Set up comb shape conductive rubber strip 301 in the inner chamber of conductive rubber 102 parcel, drive conductive rubber strip 301 and contact with static release ball 101 in proper order when the hand is pressed conductive rubber 102, ground resistance constantly reduces when realizing the predischarge, realizes the even release of static, further reduces the click sense to the human body.
FIG. 4 is a circuit diagram of the serial indicator light of the present invention. The power supply E, LED loop is composed, when the conductive block 105 contacts the static electricity releasing ball 101, the LED is lighted to indicate, and the LED is an intrinsically safe explosion-proof indicator light.
Fig. 5 is an embodiment of the present invention for adding mechanical ring alert. The implementation scheme is a passive prompting solution, has the function of prompting by ringing after the completion of the static electricity release of the human body, and has the working principle that: an insulating rod 503 is arranged on the conductive block 105, the insulating rod 503 is connected with the knocking hammer 502, and when the hand presses the electric rubber 102 and the conductive block 105, the insulating rod 503 is driven to enable the knocking hammer 502 to knock the bell body 501 to generate sound, so that the completion of the electrostatic discharge of a human body is prompted.
Fig. 6 shows an embodiment of the present invention with 1 additional pre-discharge. On the basis of the embodiment of fig. 1, a conductive rubber 603 is added in the void space of 107, the conductive rubber 603 is also wrapped on the periphery of the electrostatic release ball 101 and leaves a void space 602, and a conductive block 601 is arranged on the conductive rubber, and the equivalent circuit thereof is shown in fig. 8, and the working process thereof is as follows:
① when touching the conductive rubber 102 and the conductive block 105, the static electricity of human body pre-discharges through the connection joint of the conductive rubber 102 and the static electricity releasing ball 101, so that static spark is not generated during touching, and the click feeling of human body discharge is avoided, referring to the equivalent circuit diagram 8, R is the conductive rubber distributed resistance.
② the gap space 107 is compressed by pressing the conductive rubber 102 and the conductive block 105 by hand until the conductive block 105 contacts with the conductive block 601 to realize 1 pre-discharge, referring to the equivalent circuit diagram 8, which is equivalent to K1 closed, and the electric shock feeling of human body can be further eliminated by selecting the resistance value.
③, the conductive rubber 102 and the conductive block 105 are continuously pressed by hand to drive the conductive block 601 to further compress the void space 602 until the conductive block 601 contacts the electrostatic releasing ball 101 to realize direct grounding of the human body and complete electrostatic release of the human body, and referring to fig. 8, the closing of the switch K2 is equivalent to the contact conduction between the conductive block 601 and the electrostatic releasing ball 101.
④ when the hands are released, the conductive rubber 102 and the conductive block 105 will return under the elasticity of the conductive rubber to wait for the next operation of eliminating the static electricity of human body.
Furthermore, the nth conductive rubber and the conductor can be arranged in the stroke of pressing the conductive rubber to perform n times of pre-discharge, wherein n is the number of times of pre-discharge. The pre-discharge is performed to further reduce the shock to the human body when the static electricity is discharged, so the resistance should be set from large to small (according to the specific situation, it can be selected from large to small at 1 mega ohm-1000 mega ohm), for example, 3 times of pre-discharge is set, and the resistance can be set to 100 mega ohm, 50 mega ohm, 1 mega ohm.
In an embodiment, the conductive material may be a metallic material, such as stainless steel.
In addition, a glow discharge tube can be arranged in the electrostatic discharge loop to display the discharge process of the static electricity (in the case of meeting the explosion-proof requirement, such as explosion-proof neon bubbles).
Fig. 9 shows a variant embodiment of fig. 1, in view of the need for reliable electrical connection between the conductive rubber 102 and the esd relief ball 101, the joint 106 is a tubular surface contact (joint), i.e. the conductive rubber is tightly sleeved on the cylinder connected to the esd relief ball, the conductive rubber is provided with a corrugated shape 901 for compression, and further provided with an explosion-proof breathing hole 902 for air to pass in and out. The other function of the explosion-proof breathing hole is that even if electrostatic sparks occur between the conductive block and the electrostatic discharge ball, the explosion-proof breathing hole can be sealed in the gap space, and the explosion-proof breathing hole is suitable for being used in high-grade explosion-proof places. The electrostatic discharge ball 101 is made of a conductive material and is grounded, the electrostatic discharge ball is a name of a conventional product, and can be understood as a grounding conductor in the invention.
Fig. 10 shows an embodiment of the present invention for increasing audible indication or tactile feedback, where the essence of the conventional electrostatic releasing ball is a ground conductor, 1011 is a ground conductor, a conductive part 1004 and a spring plate 1003 connected thereto are disposed on the ground conductor 1011, a conductive part 1001 and a spring plate 1002 connected thereto are disposed on the conductive block 105, when a pressing action is performed, the spring plates 1002 and 1003 are collided and bent (i.e. contact conduction, contact time is related to pressing speed and spring plate length, and a required time can be obtained by adjusting the spring plate length), the spring plate is blocked to generate resistance, the pressing is continued to make the spring plate 1002 cross 1003, at this time, the spring plate 1002 suddenly loses resistance to make a hand feel tactile, and the spring plate 1002 and the spring plate 1003 vibrate to realize audible indication. Of course, the conductive part and the spring plate connected with the conductive part can be only provided in one group.
And (4) sounding indication: at least one elastic sheet is arranged in the conductive rubber cavity and connected to the conductive block or/and the grounding conductor, and when the product is pressed by a hand, the elastic sheet is touched and bent and passes over an obstacle to vibrate so as to realize sound indication.
Or the metal elastic sheet is arranged, at least one metal elastic sheet is connected to the conductive block or the grounding conductor, and when the product is manually pressed, the metal elastic sheet is touched, bent and suddenly changed to vibrate so as to realize sound indication.
Tactile feedback: at least one elastic sheet is arranged in the conductive rubber cavity and connected to the conductive block or/and the grounding conductor, and when the product is pressed by a hand, the elastic sheet is touched and bent to resist and cross an obstacle so that the hand obtains a tactile prompt.
Or adopt the metal shrapnel, set up at least one metal shrapnel and connect on conducting block or ground conductor, the metal shrapnel is touched crooked sudden change and makes the hand obtain the sense of touch suggestion when this goods is pressed to the hand.
The metal elastic sheet adopts the elastic sheet that traditional switch used: the metal elastic sheet (also called metal dome or snapdome, snap dome) is made of ultrathin (0.05 mm-0.1mm thickness) and ultrathin (generally higher hardness) stainless steel 301 or 304 materials. The metal elastic sheet is mainly applied to products such as membrane switches, contact switches, PCB boards, FPC boards, medical instruments and the like. The working principle of the metal elastic sheet is as follows: the metal elastic sheet on the film key is positioned at a conductive part (mostly above the golden finger on the circuit board) on the PCB, when the metal elastic sheet is pressed, the central point of the elastic sheet is concave downward and contacts with a circuit on the PCB to form a loop, and the current passes through the loop, so that the whole product can work normally. The general conventional metal shrapnel is divided into the following parts according to different shapes: circular metal shrapnel, cross metal shrapnel, triangle metal shrapnel and ellipse metal shrapnel.
Since the contact of the elastic pieces is continued for a period of time longer than 0.1 second (which is related to the pressing speed and the length of the elastic pieces and can be obtained by adjusting the length of the elastic pieces), and the time required for directly releasing the static electricity of the human body by grounding is less than 0.1 second (generally 0.08 second), the scheme has the effect of ensuring that the time required for releasing the static electricity of the human body is quickly released (unexpected effect).
Fig. 11 shows an embodiment of the present invention using an electrically conductive permanent magnet contact discharge (i.e., magnetic grounding device), 1101 is an electrically conductive elastic member, such as a spring, 1102 is an electrically conductive permanent magnet, or a permanent magnet wrapped with a conductive material, the direction or manner of the magnetic pole of the permanent magnet is not limited, the grounding conductor 1011 is made of a ferromagnetic conductive material, when the pressing action is performed, the conductive permanent magnet 1102 is continuously close to the grounding conductor 1011, and finally attraction occurs, so that the conductor 105 is stably and electrically connected with the conductive block 105 and the grounding conductor 1011 through the conductive elastic member 1101 and the conductive permanent magnet 1102, the stable electrical connection lasts for a time (which is determined by the elastic coefficient of the conductive elastic member and the magnetic force of the permanent magnet, and can be considered to be adjusted), which is far enough to satisfy the time required for complete discharge of static electricity, meanwhile, the suction action of the permanent magnet can be transmitted to the hand to form touch feeling, or the suction action of the permanent magnet gives out collision sound. The restoring elasticity of the conductive rubber 102 is larger than the attraction force of the conductive permanent magnet, and the magnetic grounding device is opened after the hand is released.
Fig. 12 shows an alternative version of the embodiment of fig. 11, with an electrically conductive permanent magnet disposed on and electrically connected to ground conductor 1011, and armature 1201 disposed in cooperation with electrically conductive permanent magnet 1102.
In addition, the conductive rubber adopted in the scheme can be replaced by an insulating elastic material and a resistor, namely, the pressing device is manufactured by the insulating elastic material, and meanwhile, the resistor is bridged between the conductive block and the static electricity release ball or the ground, and the recommended value of the resistor is 10 megaohms-1000 megaohms.
The conductive rubber in all embodiments of the present invention can be understood as an extended subconductor elastic material.
Accordingly, the claims of the present application extend to:
an intrinsic safety explosion-proof human body static electricity releasing ball/device is characterized in that: the device comprises a grounding conductor, wherein a sub-conductor elastic material is wrapped on the periphery of the grounding conductor, a gap space is formed between the grounding conductor and the sub-conductor elastic material except a wrapping joint seam \ the surface of the sub-conductor elastic material, at least one conductive block is arranged on the sub-conductor elastic material, when the sub-conductor elastic material and the conductive block wrapped on the periphery of the grounding conductor are contacted by hands, human static pre-discharge is carried out, and the sub-conductor elastic material is further pressed manually to compress the gap space until the conductive block is electrically connected with the grounding conductor to realize direct grounding of a human body to complete static discharge of the human body.
The grounding conductor refers to a conductor connected to the ground when in use.
The grounding resistance value of the sub-conductor elastic material wrapped on the periphery of the grounding conductor is larger than the resistance value of the conductive block.
The intrinsic safety explosion-proof human body static electricity releasing ball/device is characterized in that: the conductive block is a low resistance sub-conductor elastic material or conductor.
The intrinsic safety explosion-proof human body static electricity releasing ball/device is characterized in that: the sound producing device is composed of a spring plate, or the tactile feedback device is composed of a spring plate.
The intrinsic safety explosion-proof human body static electricity releasing ball/device is characterized in that: the magnetic grounding device at least comprises a conductive elastic piece and a conductive permanent magnet.
The intrinsic safety explosion-proof human body static electricity releasing ball/device is characterized in that: the void space is connected with the outside by a breathing hole or a respiratory tract.
The breathing hole or the respiratory tract is an explosion-proof breathing hole or an explosion-proof respiratory tract.
The intrinsic safety explosion-proof human body static electricity releasing ball/device is characterized in that: the sub-conductor elastic material is conductive rubber.
The intrinsic safety explosion-proof human body static electricity releasing ball/device is characterized in that: the conductive block is low-resistance conductive rubber, and the resistance value of the conductive block is 0-200 megohms.
The intrinsic safety explosion-proof human body static electricity releasing ball/device is characterized in that: the resistance value of the conductive rubber wrapped on the periphery of the static electricity releasing ball is 10 megohm-1000 megohm.
The intrinsic safety explosion-proof human body static electricity releasing ball/device is characterized in that: the device also comprises an electrostatic detection device which is used for detecting the electrostatic discharge effect and prompting by sound or light.
An intrinsic safety explosion-proof human body static electricity releasing ball/device is characterized in that: the sub-conductor elastomeric material may be replaced by an insulating elastomeric material and a resistor R1, resistor R1 bridging the conductive block and the ground conductor.
The resistance value of the resistor R1 is 10 megohms-1000 megohms.
The resistance values of the resistors provided in the invention can be understood as recommended values, and the protection range of the present application is not necessarily limited, and the reference implementation is specifically performed according to the standards of related industries, such as GB4385-1995 (the recommended value resistance value range is 100k Ω -1000M Ω), GB/T11210-2014 (the recommended value resistance value does not exceed 300M Ω), GJB 2605-1996, and GB 12014-1989. M Ω means mega ohm.
The above application modes and rules do not limit the basic features of the method and system of the present invention, and do not limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. An intrinsic safety explosion-proof human body static electricity release ball is characterized in that: the static electricity pre-discharging device comprises a grounding conductor, wherein a sub-conductor elastic material wraps the periphery of the grounding conductor, a gap space is formed between the grounding conductor and the sub-conductor elastic material except for a wrapping joint or a joint surface, at least one conductive block is arranged on the sub-conductor elastic material, when the sub-conductor elastic material and the conductive block wrapped on the periphery of the grounding conductor are contacted by hands, the static electricity pre-discharging device is used for carrying out human static electricity pre-discharging, and further, the sub-conductor elastic material is pressed manually to compress the gap space until the conductive block is electrically connected with the grounding conductor to realize direct grounding of a human body so as to realize complete.
2. The intrinsically safe explosion-proof human body static electricity releasing ball as claimed in claim 1, which is characterized in that: the sub-conductor elastomeric material may be replaced by an insulating elastomeric material and a resistor R1, resistor R1 bridging the conductive block and the ground conductor.
3. The intrinsically safe explosion-proof human body static electricity releasing ball as claimed in claim 2, which is characterized in that: the resistance value of the resistor R1 is 10 megohm-1000 megohm.
4. The intrinsically safe explosion-proof human body static electricity releasing ball as claimed in claim 1, which is characterized in that: the sub-conductor elastic material is conductive rubber.
5. The intrinsically safe explosion-proof human body static electricity releasing ball as claimed in claim 4, wherein: the conductive block is low-resistance conductive rubber, and the resistance value of the conductive block is 0-200 megohms.
6. The intrinsically safe explosion-proof human body static electricity releasing ball as claimed in claim 5, which is characterized in that: the resistance value of the conductive rubber wrapped on the periphery of the static electricity releasing ball is 10 megohm-1000 megohm.
7. The intrinsically safe explosion-proof human body static electricity releasing ball as claimed in claim 1, 2, 3, 4, 5 or 6, wherein: the sound producing device is composed of a spring plate, or the tactile feedback device is composed of a spring plate.
8. The intrinsically safe explosion-proof human body static electricity releasing ball as claimed in claim 1, 2, 3, 4, 5 or 6, wherein: the magnetic grounding device at least comprises a conductive elastic piece and a conductive permanent magnet.
9. The intrinsically safe explosion-proof human body static electricity releasing ball as claimed in claim 1, 2, 3, 4, 5 or 6, wherein: the void space is connected with the outside by a breathing hole or a respiratory tract.
10. The breathing orifice or respiratory tract of claim 9 being an explosion-proof breathing orifice or an explosion-proof respiratory tract.
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| CN203342196U (en) * | 2013-07-02 | 2013-12-18 | 大连吉科静电技术有限公司 | Human body electrostatic discharging device |
| CN105327447A (en) * | 2015-11-26 | 2016-02-17 | 杭州大精机械制造有限公司 | Human body electrostatic discharge device |
| JP6337409B1 (en) * | 2017-05-29 | 2018-06-06 | 宏明 武藤 | Static eliminator that can neutralize static electricity |
| CN212347455U (en) * | 2020-02-14 | 2021-01-15 | 吴东辉 | Intrinsic safety explosion-proof human body static electricity releasing ball |
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