CN205083600U - Radio frequency acne treatment device - Google Patents
Radio frequency acne treatment device Download PDFInfo
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- CN205083600U CN205083600U CN201520615096.2U CN201520615096U CN205083600U CN 205083600 U CN205083600 U CN 205083600U CN 201520615096 U CN201520615096 U CN 201520615096U CN 205083600 U CN205083600 U CN 205083600U
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Abstract
The utility model provides a radio frequency acne treatment device, including the host computer and with the therapeutical handle that the host computer is connected, wherein, include at least two and the therapeutical handle that the host computer is connected, two the treatment handle for be applicable to the selectivity destroy invasive therapeutical handle that sebaceous glands cell and high temperature exterminateed acne propionic acid bacillus and be applicable to heating genuine leather in sebaceous non -invasive treat the handle. Through the utility model provides a two kind above -mentioned therapeutical handles can kill acne propionic acid bacillus, also solve the source that the acne produced from the root, and the smegma is prosperous excessively, has alleviated the skin inflammation, and the time of treatment is shorter, the curative effect is better, have avoided the phenomenon of recurring simultaneously.
Description
Technical field
This utility model relates to medical instruments field, particularly relates to a kind of radio frequency acne therapy device.
Background technology
Acne is common in teenager, and in the crowd in 12-30 year, its sickness rate is up to 80%.Acne treatment, conventional oral drugs, the modes such as red blue-light treatment.Drug therapy is generally and suppresses the breeding of propionibacterium acnes and the mode of antiinflammatory to be treated.Usually there is end-of-dose failure, the phenomenons such as therapeutic process is very long, unsatisfactory curative effect.Another scheme, adopts red blue-light treatment, needs repeatedly to treat, significantly increases the time cost of patient, and there is pigmentation after treatment.HONGGUANG in red blue light has antiinflammatory symptom, the Excreta of blue light illumination propionibacterium acnes, can discharge singlet oxygen and kill propionibacterium acnes to reach the object for the treatment of.Because treatment still can not change the excessive secretion of sebaceous gland, the phenomenon of a recurrent exerbation can be presented.
Therefore, how to realize carrying out acne treatment fast and effectively and can be good at avoiding recurrence, just having become those skilled in the art's problem demanding prompt solution.
Utility model content
The shortcoming of prior art in view of the above, the purpose of this utility model is to provide a kind of radio frequency acne therapy device, has that therapeutic process is very long, the problem of unsatisfactory curative effect and recurrent exerbation during for solving in prior art and carrying out acne treatment.
For achieving the above object and other relevant objects, this utility model provides following technical scheme:
A kind of radio frequency acne therapy device, the treatment handle comprising main frame and be connected with described main frame, wherein, at least comprise two treatment handles be connected with described main frame, two described treatment handles are be applicable to selective destruction sebocyte cell and high temperature is killed the intrusive mood treatment handle of propionibacterium acnes and is applicable to heat the non-invasively treating handle of sebum in corium.
Preferably, described intrusive mood treatment handle comprises handle and treatment head, and described handle and described treatment head are connected and fixed with having angle.
Preferably, the scope of described angle is 90 °-180 °, and more preferably, described angle can be set to 120 °.
Preferably, the treatment head on described intrusive mood treatment handle also comprises treatment syringe needle and forms with the fixed component for being fixedly connected with described treatment syringe needle, and wherein, described fixed component becomes to removably connect with described handle.
Preferably, the treatment head on described intrusive mood treatment handle also comprises treatment syringe needle and forms with the fixed component for being fixedly connected with described treatment syringe needle, and wherein, described fixed component is connected to described handle, and becomes to removably connect with described treatment syringe needle.
Preferably, described treatment syringe needle is single needle syringe needle.
Preferably, described treatment syringe needle comprises base and is fixed on the micropin radio-frequency electrode on described base.
Preferably, the lower surface of described micropin radio-frequency electrode is coated with dielectric film, or is coated with dielectric film in the lower surface and middle part surface of described micropin radio-frequency electrode.
Preferably, the temperature sensor for monitoring objective target tissue temperature is also provided with in the micropin radio-frequency electrode on described treatment syringe needle.
Preferably, described non-invasively treating handle comprises handle and at least 3 radio-frequency electrodes be connected with described handle, and described non-invasively treating handle is bipolar radio frequency export structure.
Preferably, arbitrary electrode in described at least 3 radio-frequency electrodes be connected with described handle is radio frequency positive pole/radio frequency negative pole, other radio-frequency electrode is radio frequency negative pole/radio frequency positive pole, and described radio frequency positive pole/radio frequency negative pole switches in turn between each radio-frequency electrodes all.
Preferably, described radio-frequency electrode is 4 electrodes, and one of them is positive pole, and other three is negative pole.
Preferably, the time that described radio frequency positive pole/radio frequency negative pole switches in turn between all radio-frequency electrodes is 0.1s-10s.
Preferably, also be connected with the 3rd treatment handle on the host, the described 3rd treats one or more the combination that handle is intrusive mood micropin lattice radio frequency handle, RF-assisted liposuction handle, the dot matrix handle of exfoliation treatment, varicose treatment handle, radio frequency noinvasive are lost weight in handle.
Hinge structure, the technical solution of the utility model has as above a little:
The first, connect two treatment handles on the same host, one of them is intrusive mood treatment handle, kills propionibacterium acnes for selective destruction sebocyte cell and high temperature; Another is non-invasively treating handle, for heating sebum in corium, to reduce the pain in suppuration thing leaching process, promotes that dermal collagen is newborn simultaneously, avoids the formation of acne scars after acne treatment;
The second, the CURRENT DISTRIBUTION of the radio-frequency electrode on treatment handle controls, and can effectively increase thermal dispersion region, on whole treatment face, its energy is more evenly good, thus the time reaching treatment is shorter, curative effect is better and avoid the effect of recurrence simultaneously.
Accompanying drawing explanation
The schematic diagram of a kind of radio frequency acne therapy device that Fig. 1 provides for this utility model.
Fig. 2 is a kind of embodiment schematic diagram of intrusive mood treatment handle.
Fig. 3 is a kind of embodiment structure chart for the treatment of in intrusive mood treatment handle in head.
Fig. 4-1 is the structural representation of a kind of monopolar radio frequency treatment syringe needle.
Fig. 4-2 is the structural representation of a kind of monopolar radio frequency treatment syringe needle.
Fig. 5-1 is the structural representation of a kind of bipolar radio frequency treatment syringe needle.
Fig. 5-2 is the structural representation of a kind of bipolar radio frequency treatment syringe needle.
Fig. 6-1 is the structural representation of another kind of bipolar radio frequency treatment syringe needle.
Fig. 6-2 is the structural representation of another kind of bipolar radio frequency treatment syringe needle.
Fig. 7 is the medical needle header structure schematic diagram of another bipolar radio-frequency electrode.
Fig. 8 is the medical needle header structure schematic diagram of another kind of monopolar radio frequency electrode.
Fig. 9 is a kind of structural representation of non-invasively treating handle.
Figure 10-1 to 10-4 is the CURRENT DISTRIBUTION schematic diagram of preferably 4 radio-frequency electrodes.
Figure 11-1 is the embodiment schematic diagram adopting 1 positive pole and 3 negative poles in non-invasively treating handle.
Figure 11-2 is the embodiment adopting 2 positive poles and 2 negative poles in prior art.
Detailed description of the invention
By particular specific embodiment, embodiment of the present utility model is described below, person skilled in the art scholar the content disclosed by this description can understand other advantages of the present utility model and effect easily.
Notice, structure, ratio, size etc. that this description institute accompanying drawings illustrates, content all only in order to coordinate description to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of this utility model, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that this utility model can produce and the object that can reach, still all should drop on technology contents that this utility model discloses and obtain in the scope that can contain.Simultaneously, quote in this description as " on ", D score, "left", "right", " centre " and " one " etc. term, also only for ease of understanding of describing, and be not used to limit the enforceable scope of this utility model, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of this utility model.
The phenomenons such as acne is generally the clogging of pores that sebaceous gland excessive secretion causes, and then produces inflammatory phenomena, breed bacteria, and presents redness, pain, suppuration.
In embodiment of the present utility model, how detailed description is realized selective destruction sebaceous gland, reach the object of Acne treatment, kill propionibacterium acnes in therapeutic process simultaneously, eliminate scytitis, shorten skin rehabilitation duration greatly, in further therapeutic process, promote that collagen protein is newborn, avoid the formation of the acne scars after acne rehabilitation.
See Fig. 1, for the schematic diagram of a kind of radio frequency acne therapy device that this utility model provides, described radio frequency acne therapy device comprises a main frame 1 and at least two treatment handles 2 be connected with main frame 1, wherein, two treatment handles 2 comprise intrusive mood treatment handle 21 and non-invasively treating handle 22, intrusive mood treatment handle 21 kills propionibacterium acnes for selective destruction sebocyte cell and high temperature, non-invasively treating handle 22 is for heating sebum in corium, to reduce the pain in suppuration thing leaching process, promote that dermal collagen is newborn simultaneously, avoid the formation of acne scars after acne treatment.
In concrete enforcement, main frame 1 is used for providing high frequency electric source (i.e. source of radio frequency energy) for connected treatment handle 2 and controlling the output of described high frequency electric source.In addition, the radio-frequency (RF) therapy main frame 1 provided in this utility model embodiment is the same, and be made up of controller, panel, high frequency electric source and display too, its middle controller is connected with panel, high frequency electric source and display respectively.
In concrete enforcement, controller is also connected with treatment handle 2, for receiving the feedback signal that treatment handle obtains, and adjusts the output (hereafter will be described in detail) of high frequency electric source according to described feedback signal.
In concrete enforcement, see Fig. 2, give a kind of embodiment schematic diagram that the intrusive mood be connected with main frame 1 treats handle 21, as shown in the figure, intrusive mood treatment handle 21 comprises handle 211 and treatment 212, handle 211 is connected, so that can observe treatment target position well over the course for the treatment of with treatment 212 with having angle.Usually, the angular range between handle 211 and treatment 212 can select 90 °-180 °, and best angle degree generally selects 120 °.
In concrete enforcement, see Fig. 3, give in intrusive mood treatment handle a kind of embodiment structure chart for the treatment of in head, as Fig. 3, the treatment 212 of intrusive mood treatment handle 21 can also be made up of fixed component 212a and treatment syringe needle 212b, and wherein, fixed component 212a is used for being fixedly connected with treatment syringe needle 212b, and for removably connecting with handle 211, be convenient to using treatment 212 as consumptive material to reduce replacement cost.Natch, also can removably connect making between fixed component 212a and treatment syringe needle 212b, syringe needle 212b will be treated as consumptive material, to change.
In concrete enforcement, in order to adapt to various Curing circumstance and realize therapeutic effect better, treatment syringe needle 212b can have multiple project organization, is described in detail below by the structure of various treatment syringe needle 212b.
See Fig. 4-1, give the structural representation of a kind of monopolar radio frequency treatment syringe needle, as shown in the figure, treatment syringe needle comprises base 41, temperature sensor 42, micropin radio-frequency electrode plated film part 43 and micropin radio-frequency electrode treatment part 44 (i.e. micropin radio-frequency electrode), over the course for the treatment of, transmit radio-frequency (RF) energy by radio-frequency electrode treatment part 44, and form loop between the negative plate in equipment.The same Fig. 4-2 of Fig. 4-2 agent structure, not containing temperature sensor in its treatment syringe needle.
See Fig. 5-1, give the structural representation of a kind of bipolar radio frequency treatment syringe needle, base 51, temperature sensor 52, micropin radio frequency positive pole 53, micropin radio frequency negative pole 55, first micropin radio-frequency electrode plated film part 54 and the second micropin radio-frequency electrode plated film part 56 is comprised as Fig. 5-1 treats syringe needle, wherein spaced apart by both positive and negative polarity of the first micropin radio-frequency electrode plated film part 54, avoid electric current directly by the directly transmission of radio-frequency electrode surface, the second micropin radio-frequency electrode plated film part 56 carries out plated film for avoiding the incrustation of therapeutic process mesocuticle.The same Fig. 5-2 of Fig. 5-2 agent structure, not containing temperature sensor in its treatment syringe needle.
See Fig. 6-1, give the structural representation of another kind of bipolar radio frequency treatment syringe needle, comprise base 61, temperature sensor 62, micropin radio frequency negative pole 63, micropin radio frequency positive pole 64 and micropin radio-frequency electrode plated film part 65 as Fig. 6-1 treats syringe needle, radio-frequency current is invaded between subcutaneous skin histology by micropin radio frequency positive pole 64 and micropin radio frequency negative pole 63 and forms loop.The same Fig. 6-2 of Fig. 6-2 agent structure, not containing temperature sensor in its treatment syringe needle.
See Fig. 7, give the medical needle header structure schematic diagram of another bipolar radio-frequency electrode, as Fig. 7.Treatment syringe needle comprises base 71, first micropin radio frequency positive pole plated film part 72, micropin radio frequency positive pole 73, second micropin radio frequency negative pole plated film part 74, micropin radio frequency negative pole 75 and temperature sensor 74.
In concrete enforcement, because radio frequency just very contacts nearest position with sebaceous gland, more excellent is designed to layout temperature sensor in radio frequency positive pole.As Fig. 8, give the medical needle header structure schematic diagram of another kind of monopolar radio frequency electrode, described treatment syringe needle comprises radio-frequency electrode base 81, micropin radio-frequency electrode plated film part 82, micropin radio-frequency electrode part 83 and temperature sensor 84.In case study on implementation in fig. 8, treatment syringe needle is basic identical with the case study on implementation in Fig. 4-2 with Fig. 4-1, and it is distinguished as inside temperature sensor being moved to micropin radio-frequency electrode part 83 by electrodes base.In like manner, in the case study on implementation in Fig. 5, Fig. 6-1, Fig. 6-2, Fig. 7, also temperature sensor can be arranged on intrusion electrode interior, there is temperature detection more accurately.
Treatment syringe needle can be designed as T-shaped electrode structure, and the electrode needle point on top is for invading parts, and its object is treated for invading skin histology, electrodes base part (32,41,51,61,71,81) be blocking member, its object fixed electrode needle point that is limited invades the subcutaneous degree of depth.Because the skin corium degree of depth is the degree of depth being generally 1mm-3mm, setting microneedle electrodes length is the length (the whole radio-frequency electrode of removing electrodes base part) of 1mm-3mm, the 2mm of concrete may be facial treatments is also likely the 1mm of head treatment.
To the rehabilitation obstacle that the hot injury of epidermis causes in therapeutic process, bottom design needle point, carry out the design of plating insulating film layer.Thickness due to epidermal area be 0.1mm-0.4mm not etc., be 0.1mm-0.4mm by the depth-set of microneedle electrodes plated film part (43,56,65,72,86).Because sebaceous gland is mainly distributed in the depth bounds of the 0.2mm-1mm in skin corium, the more excellent microneedle electrodes plated film partial depth that arranges is 0.3mm.
Meanwhile, electrodes base (32,41,51,61,71,81) also can contact with epidermal skin, carries out the process of plating dielectric film to electrodes base, or adopts non-metallic material.
In order to ensure treatment safety and curative effect, radio-frequency electrode inside has temperature sensor (42,52,62,74,84), for monitor therapy area target tissue temperature.Or directly setting treatment temperature is treated, monitor target tissue temperature and reach setting value and namely stop treatment.
As above the treatment syringe needle in Fig. 4-1-Fig. 8, all coordinates the treatment handle in Fig. 2 or Fig. 3 to use.Its object is selective destruction sebaceous gland, carries out targeting invade treatment to sebaceous gland.When providing the temperature of 60-100 DEG C to sebaceous gland, sebaceous gland starts coagulation necrosis, thus reduces the secretion of sebum, avoids the recurrence of acne from root.Meanwhile, the diameter of sebum body of gland is usually at more than 0.3mm, and the thermal relaxation time of its correspondence is 100ms, in order to reach good therapeutic effect, the pulse width of radio frequency energy carries out requirement, when pulse width reaches 100ms, can ensure that radio-frequency (RF) energy well can cover whole sebaceous gland region.The sebaceous gland of nose areas reaches 1mm greatly due to body of gland simultaneously, needs higher treatment injure width.According to the treatment of zones of different, its RF pulse width is set as that 0.1S-1S is not etc.
In concrete enforcement, in intrusive mood treatment handle 21 invades 1-2 days after treating, treatment target position there will be onal and transudate, now just need to utilize non-invasively treating handle 22 to carry out auxiliary treatment, non-invasively treating handle 22 is for removing onal and transudate, reduce the pain in suppuration thing leaching process, promote that dermal collagen is newborn simultaneously, avoid the formation of acne scars after acne treatment.See Fig. 9, give a kind of structural representation of non-invasively treating handle, as Fig. 9, non-invasively treating handle 22 comprises handle 91, multiple radio-frequency electrode 92 (in the present embodiment being 4) and temperature sensor 93, described non-invasively treating handle 22 adopts bipolar radio frequency to export, and has the radio-frequency electrode of more than at least 3.Wherein, the distribution of electrodes of described radio-frequency electrode is: using the positive pole of any one electrode as radio frequency, and remaining all electrodes are the negative pole of radio frequency, and the positive pole of radio frequency switches in turn between all electrodes, and switching time is 0.1s-10s; Or be the negative pole of radio frequency by any one electrode, remaining all electrodes are the positive pole of radio frequency, and the negative pole of radio frequency switches in turn between all electrodes, and switching time is 0.1s-10s.Preferably, general employing 4 electrodes, one of them electrode is positive pole, and three remaining electrodes are negative pole, and as shown in Figure 10-1 to 10-4, the switching between electrode carries out control realization by relay.
In concrete enforcement, then composition graphs 10-1 to Figure 10-4, it is the CURRENT DISTRIBUTION schematic diagram of preferred 4 radio-frequency electrodes.At Figure 10-1 in Figure 10-4, electrode a, electrode b, electrode c, electrode d are respectively at the positive pole of different time points as radio frequency, and the electrode of other correspondences is as the negative pole of radio frequency, wherein, the time that the positive pole of radio frequency carries out switching between each electrode can be 0.1s-10s, in this utility model, preferably adopts the time that 0.2s switches as electrode.
Adopt Figure 10-1 to the distribution of electrodes in 10-4, compare with the treatment handle of 2 negative poles with traditional 2 positive poles that comprise, it has larger thermal dispersion region, and concrete can see Figure 11-1 and Figure 11-2.It is the embodiment of employing 1 positive pole and 3 negative poles in Figure 11-1; Be the embodiment of employing 2 positive poles and 2 negative poles in Figure 11-2, wherein, Figure 11-1 is compared with Figure 11-2, and the embodiment in Figure 11-1 has the interval thermal dispersion region of extra ac and bd two, and on whole treatment face, its energy is more evenly good.
Further, in concrete enforcement, except connect intrusive mood treatment handle 21 and non-invasively treating handle 22 two kinds of handles on main frame 1 except, the 3rd treatment handle can also be added, even more treatment handles.Wherein, the 3rd treatment handle increased can be any one in the dot matrix handle of intrusive mood micropin lattice radio frequency handle, RF-assisted liposuction handle, exfoliation treatment, varicose treatment handle, radio frequency noinvasive fat-reducing handle or multiple combination.It is to be appreciated that the same with in above-described embodiment of the energy source output principle of the handle increased and control principle, just repeat no more here.
In sum, by above-mentioned two kinds for the treatment of handles (intrusive mood treatment handle 21 and non-invasively treating handle 22), propionibacterium acnes can be killed, also the source of acne generation is solved from root, smegma is excessively prosperous, alleviate scytitis, and the time for the treatment of is shorter, curative effect is better, avoids the phenomenon of recurrence simultaneously.So this utility model effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not for limiting this utility model.Any person skilled in the art scholar all without prejudice under spirit of the present utility model and category, can modify above-described embodiment or changes.Therefore, such as have in art and usually know that the knowledgeable modifies or changes not departing from all equivalences completed under the spirit and technological thought that this utility model discloses, must be contained by claim of the present utility model.
Claims (15)
1. a radio frequency acne therapy device, the treatment handle comprising main frame and be connected with described main frame, it is characterized in that: at least comprise two treatment handles be connected with described main frame, two described treatment handles are be applicable to selective destruction sebocyte cell and high temperature is killed the intrusive mood treatment handle of propionibacterium acnes and is applicable to heat the non-invasively treating handle of sebum in corium.
2. radio frequency acne therapy device according to claim 1, is characterized in that: described intrusive mood treatment handle comprises handle and treatment head, and described handle and treatment head are connected and fixed with having angle.
3. radio frequency acne therapy device according to claim 2, is characterized in that: the scope of described angle is 90 °-180 °.
4. radio frequency acne therapy device according to claim 2, is characterized in that: described angle is 120 °.
5. radio frequency acne therapy device according to claim 2, it is characterized in that: the treatment head on described intrusive mood treatment handle also comprises treatment syringe needle and forms with the fixed component for being fixedly connected with described treatment syringe needle, wherein, described fixed component becomes to removably connect with described handle.
6. radio frequency acne therapy device according to claim 2, it is characterized in that: the treatment head on described intrusive mood treatment handle also comprises treatment syringe needle and forms with the fixed component for being fixedly connected with described treatment syringe needle, wherein, described fixed component is connected to described handle, and becomes to removably connect with described treatment syringe needle.
7. the radio frequency acne therapy device according to claim 5 or 6, is characterized in that: described treatment syringe needle is single needle syringe needle.
8. the radio frequency acne therapy device according to claim 5 or 6, is characterized in that: described treatment syringe needle comprises base and is fixed on the micropin radio-frequency electrode on described base.
9. radio frequency acne therapy device according to claim 8, is characterized in that: in the lower surface of described micropin radio-frequency electrode, be coated with dielectric film, or is coated with dielectric film in the lower surface and middle part surface of described micropin radio-frequency electrode.
10. radio frequency acne therapy device according to claim 8, is characterized in that: be also provided with the temperature sensor for monitoring objective target tissue temperature in the micropin radio-frequency electrode on described treatment syringe needle.
11. radio frequency acne therapy devices according to claim 1, is characterized in that: described non-invasively treating handle comprises handle and at least 3 radio-frequency electrodes be connected with described handle, and described radio-frequency electrode is bipolar radio frequency export structure.
12. radio frequency acne therapy devices according to claim 11, it is characterized in that: the arbitrary electrode in described at least 3 radio-frequency electrodes be connected with described handle is radio frequency positive pole/radio frequency negative pole, other radio-frequency electrode is radio frequency negative pole/radio frequency positive pole, and described radio frequency positive pole/radio frequency negative pole switches in turn between each radio-frequency electrodes all.
13. radio frequency acne therapy devices according to claim 12, is characterized in that: the radio-frequency electrode quantity of described at least 3 radio-frequency electrodes is 4.
14. radio frequency acne therapy devices according to claim 12, is characterized in that: the time that described radio frequency positive pole/radio frequency negative pole switches in turn between all radio-frequency electrodes is 0.1s-10s.
15. according to the radio frequency acne therapy device described in claim 1,2,11,12,13 or 14, it is characterized in that: be also connected with the 3rd treatment handle on the host, the described 3rd treats one or more the combination that handle is intrusive mood micropin lattice radio frequency handle, RF-assisted liposuction handle, the dot matrix handle of exfoliation treatment, varicose treatment handle, radio frequency noinvasive are lost weight in handle.
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| CN201520615096.2U CN205083600U (en) | 2015-08-14 | 2015-08-14 | Radio frequency acne treatment device |
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| CN201520615096.2U CN205083600U (en) | 2015-08-14 | 2015-08-14 | Radio frequency acne treatment device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105055016A (en) * | 2015-08-14 | 2015-11-18 | 重庆德马光电技术有限公司 | Radio frequency acne therapy device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105055016A (en) * | 2015-08-14 | 2015-11-18 | 重庆德马光电技术有限公司 | Radio frequency acne therapy device |
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Effective date of registration: 20160830 Address after: Baoan District Xin'an street Shenzhen city Guangdong province 518101 68 district left three road Changfeng Industrial Park F2 building 3 floor A block Patentee after: Shenzhen Bandao Medical Co., Ltd. Address before: Jiulongpo District, Jiulongpo District, Chongqing city 400041 park four street 70-1, 70-2 block IJ No. two 2-4 Patentee before: Chongqing Dema Photoelectric Technology Co., Ltd. |