CN104208796B - For the transmission device of needle roller unlock and with its medical gas supply device - Google Patents
For the transmission device of needle roller unlock and with its medical gas supply device Download PDFInfo
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- CN104208796B CN104208796B CN201310222402.1A CN201310222402A CN104208796B CN 104208796 B CN104208796 B CN 104208796B CN 201310222402 A CN201310222402 A CN 201310222402A CN 104208796 B CN104208796 B CN 104208796B
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- needle roller
- spool
- sliding slot
- mounting groove
- spacer ring
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Abstract
The invention discloses a kind of transmission device for needle roller unlock and with its medical gas supply device, wherein the transmission device for needle roller unlock includes：Spool；Needle roller；Spacer ring, the spacer ring is set on the spool and can be slided along the periphery wall of the spool, mounting groove is formed on the spacer ring, the second end of the needle roller is located in the mounting groove, and the needle roller moves under the drive of the spacer ring in the needle roller sliding slot；And elastomeric element.Transmission device according to the ... of the embodiment of the present invention for needle roller unlock, the labyrinth that each part mutually links is needed compared to the unlock of the needle roller of conventional medical supplying terminal, the transmission device of the present invention efficiently avoids the superposed force of phase mutual friction between each part, needle roller is set to be slided in needle roller sliding slot more smooth, using more convenient, and the structure requires preparation process relatively easy, reduces manufacturing cost.
Description
Technical field
The present invention relates to medical instrument preparing technical fields, are filled more particularly, to a kind of transmission for needle roller unlock
It sets and with its medical gas supply device.
Background technology
The mode that current German-style medical gas supply terminal on the market mostly uses double needle rollers with the locking of plug connects, and is operating
It needs to drive the needle roller being in contact with it to roll along the upper skewed slot of spool by following layer washer in the process, then goes up needle roller group again
It drives the spacer ring being in contact with it to move downward, makes the lower needle roller group contacted with spacer ring along the lower skewed slot of spool again
It rolls, needle roller group is then descended to drive lower layer's washer dead spring again.The state is perfect condition, to allow the program smoothly to implement
Need to have following condition：1. the upper and lower skewed slot symmetry of spool must consistent and skewed slot section roughness requirements it is very high；2. rolling
The straightness of needle requires very high；3. the flatness and roughness requirements of the contact face of each washer are very high.Must have above-mentioned
Several conditions, the program could normally be implemented.Therefore, traditional linkage structure is very harsh to processing and process conditions, is prepared into
This is higher.
Invention content
The present invention is directed to solve one of above-mentioned technical problem at least to a certain extent.
For this purpose, an object of the present invention is to provide a kind of simple in structure, easy to use and low-cost for rolling
The transmission device of needle unlock.
It is another object of the present invention to propose a kind of transmission device for needle roller unlock with above-described embodiment
Medical gas supply device.
Transmission device according to the ... of the embodiment of the present invention for needle roller unlock, including：Spool, the spool are formed as hollow
Column is formed with installation space in the spool, and the periphery wall for obliquely penetrating through the spool and interior is formed on the spool
The first end of the needle roller sliding slot of peripheral wall, the spool is equipped with abutting part；Needle roller, the needle roller is located on the spool and the rolling
The first end of needle passes through the needle roller sliding slot；Spacer ring, the spacer ring are set on the spool and can be along the valves
The periphery wall of core slides, and is formed with mounting groove on the spacer ring, the second end of the needle roller is located in the mounting groove, institute
Needle roller is stated to move in the needle roller sliding slot under the drive of the spacer ring；And elastomeric element, the elastomeric element are arranged
On the spool and between the spacer ring and the abutting part, the both ends of the elastomeric element are only against institute respectively
It states between abutting part and the first end of the spacer ring.
Transmission device according to the ... of the embodiment of the present invention for needle roller unlock, by forming mounting groove on spacer ring,
Installation slot structure can be effectively shielded from conduction and friction with needle roller, and it is normal in the needle roller sliding slot of spool not influence needle roller
Sliding needs the labyrinth that each part mutually links, biography of the invention compared to the unlock of the needle roller of conventional medical supplying terminal
Dynamic device efficiently avoids the superposed force of phase mutual friction between each part, so that needle roller is slided in needle roller sliding slot more smooth, makes
With more convenient, and the structure requires preparation process relatively easy, reduces manufacturing cost.
In addition, the transmission device according to the ... of the embodiment of the present invention for needle roller unlock, can also have following additional skill
Art feature：
According to one embodiment of present invention, the needle roller sliding slot includes the first needle roller sliding slot and second arranged spaced apart
Needle roller sliding slot, angle between the first needle roller sliding slot and the axle center of the spool be less than the second needle roller sliding slot with it is described
Angle between the axle center of spool, the mounting groove include two the first mounting grooves and the second mounting groove arranged spaced apart, institute
The second end for stating the needle roller in the first needle roller sliding slot is located in first mounting groove, the needle roller in the second needle roller sliding slot
Second end is located in second mounting groove.
According to one embodiment of present invention, the needle roller sliding slot includes third needle roller sliding slot and the 4th needle roller sliding slot, institute
It is symmetrical relative to the axle center of the spool with the first needle roller sliding slot to state third needle roller sliding slot, the 4th needle roller sliding slot and institute
It is symmetrical relative to the axle center of the spool to state the second needle roller sliding slot, first mounting groove and the second mounting groove are formed as along described
The oval-shaped slot of the circumferentially extending of spacer ring and first mounting groove is parallel with second mounting groove, the third needle roller
The second end of needle roller in sliding slot is located in first mounting groove, and the second end of the needle roller in the 4th needle roller sliding slot is located at
In second mounting groove.
According to one embodiment of present invention, further include the first washer, first washer is set on the spool, and
First washer is located at the second end of the spacer ring, and the first end of first washer abuts the of the spacer ring
Two ends.
According to one embodiment of present invention, second mounting groove is open slot, and second mounting groove is located at described
The first end of the second end of spacer ring and the opening of second mounting groove against first washer.
According to one embodiment of present invention, further include second packing ring, the second packing ring be located at the elastomeric element and
Between the spacer ring, the first end of the second packing ring abuts the elastomeric element, and the second end of the second packing ring is supported
Connect the first end of the spacer ring.
According to one embodiment of present invention, first mounting groove is open slot, and first mounting groove is located at described
The first end of the first end of spacer ring and the opening of first mounting groove against the spacer ring.
According to one embodiment of present invention, the elastomeric element is spring.
According to one embodiment of present invention, the abutting part is formed as radially outward prolonging for the first end along the spool
The annular flange stretched, and it is formed with screw thread on the peripheral surface of the abutting part.
The medical gas supply device of embodiment according to a second aspect of the present invention, including：Supplying terminal；Plug；With according to above-mentioned
The transmission device for needle roller unlock described in embodiment, the transmission device be located at the supplying terminal and the plug it
Between.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obviously, or practice through the invention is recognized.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination following accompanying drawings to embodiment
Obviously and it is readily appreciated that, wherein：
Fig. 1 is the structural schematic diagram of the transmission device according to the ... of the embodiment of the present invention for needle roller unlock；
Fig. 2 is the sectional view of the transmission device according to the ... of the embodiment of the present invention for needle roller unlock；
Fig. 3 is the side view of the transmission device according to the ... of the embodiment of the present invention for needle roller unlock.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "inner", "outside" be orientation based on ... shown in the drawings or
Position relationship is merely for convenience of description of the present invention and simplification of the description, and does not indicate or imply the indicated device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.In addition, art
Language " first ", " second " are used for description purposes only, and are not understood to indicate or imply relative importance or implicitly indicate institute
The quantity of the technical characteristic of instruction." first " is defined as a result, the feature of " second " can explicitly or implicitly include one
Or more this feature.In the description of the present invention, the meaning of " plurality " is two or more, unless otherwise clearly having
The restriction of body.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be machine
Tool connects, and can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary two members
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.
The transmission of embodiment according to a first aspect of the present invention unlocked for needle roller is specifically described in conjunction with attached drawing first below
Device.
As shown in Figure 1 to Figure 3, the transmission device according to the ... of the embodiment of the present invention for needle roller unlock includes：Spool 10, rolling
Needle 20, spacer ring 30 and elastomeric element 40.
Specifically, spool 10 is formed as open column shape, it is formed with installation space in spool 10, is formed with and inclines on spool 10
The first end of the tiltedly needle roller sliding slot 11 of the periphery wall and internal perisporium of perforation spool 10, spool 10 is equipped with abutting part 12.Wherein, valve
The left end of the first end of core 10, that is, spool as shown in Figure 2 10.
Needle roller 20 is located on spool 10 and the first end of needle roller 20 passes through needle roller sliding slot 11.Spacer ring 30 is set in spool
It can slide on 10 and along the periphery wall of spool 10, mounting groove 31 is formed on spacer ring 30, the second end of needle roller 20 is located at peace
In tankage 31, needle roller 20 moves under the drive of spacer ring 30 in needle roller sliding slot 11.Wherein, the first end of needle roller 20 is rolled
Needle 20 stretches into one end in spool 10, and the second end of needle roller 20 is to expose spool 10 and one end in mounting groove 31, every
Needle roller 20 can be driven to be moved in needle roller sliding slot 11 when being moved from washer 30.
Elastomeric element 40 is set on spool 10 and between spacer ring 30 and abutting part 12, and the two of elastomeric element 40
End is only against between abutting part 12 and the first end of spacer ring 30 respectively.
Transmission device according to the ... of the embodiment of the present invention for needle roller unlock as a result, by being formed on spacer ring 30
Mounting groove 31,31 structure of mounting groove can be effectively shielded from conduction and friction with needle roller 20, and not influence needle roller 20 in spool
It is normally slided in 10 needle roller sliding slot 11, needs each part mutually to link compared to the unlock of the needle roller of conventional medical supplying terminal
Labyrinth, transmission device of the invention efficiently avoid the superposed force of phase mutual friction between each part, and needle roller 20 is made to roll
Sliding is more smooth in needle sliding slot 11, and use is more convenient, and the structure requires preparation process relatively easy, reduces preparation
Cost.
Wherein, it is not particularly limited about the structure and shape of abutting part 12, elastomeric element 40 is only supported as long as can play
Effect.In view of the transmission device also needs to coordinate with other equipment, it is preferable that according to one embodiment of present invention,
Abutting part 12 is formed as the annular flange of the first end along spool 10 to extend radially outwardly, and shape on the peripheral surface of abutting part 12
At there is screw thread.In other words, the periphery of the left end end of spool 10 is formed with flange, and the flange has certain width, convex
The screw thread formed on edge can be used for coordinating with other devices.
It should be noted that the transmission device according to the ... of the embodiment of the present invention for needle roller unlock is commonly used in medical gas supply
Locking between terminal and plug and unlock.Specifically, medical gas supply terminal and plug are located in the installation space of spool 10, often
Under state, elastomeric element 40 is in relaxation state, and needle roller 20 blocks medical gas supply terminal and it is made to be connected with plug, and medical gas supply is whole
End is in the lock state with plug.When promotion spacer ring 30, when making its elasticity of compression component 40, the movement meeting of spacer ring 30
It drives needle roller 20 sliding, 20 position of needle roller in needle roller sliding slot 11 to change, unclamps medical gas supply terminal, and plug is in bullet
Property component 40 extruding under pop up, medical gas supply terminal is detached with plug, realize unlock.
As shown in Fig. 2, according to one embodiment of present invention, needle roller sliding slot 11 includes that the first needle roller arranged spaced apart is slided
Slot 111 and the second needle roller sliding slot 112, the angle between the first needle roller sliding slot 111 and the axle center of spool 10 are slided less than the second needle roller
Angle between slot 112 and the axle center of spool 10, mounting groove 31 include two the first mounting grooves 311 and second arranged spaced apart
The second end of mounting groove 312, the needle roller 20 in the first needle roller sliding slot 111 is located in the first mounting groove 311, the second needle roller sliding slot
The second end of needle roller 20 in 112 is located in the second mounting groove 312.As a result, by the way that two needle roller sliding slots 11 are arranged, can enhance
To being located at the fixed effect of the device in installation space.
Further, needle roller sliding slot 11 further includes third needle roller sliding slot 113 and the 4th needle roller sliding slot 114, and third needle roller is slided
Slot 113 is symmetrical relative to the axle center of spool 10 with the first needle roller sliding slot 111, the 4th needle roller sliding slot 114 and the second needle roller sliding slot 112
Axle center relative to spool 10 is symmetrical, and the first mounting groove 311 and the second mounting groove 312 are formed as prolonging along the circumferential direction of spacer ring 30
The oval-shaped slot and the first mounting groove 311 stretched are parallel with the second mounting groove 312, and of the needle roller 20 in third needle roller sliding slot 113
Two ends are located in the first mounting groove 311, and the second end of the needle roller 20 in the 4th needle roller sliding slot 114 is located in the second mounting groove 312.
It is rolled as a result, by setting and the first needle roller sliding slot 111 and 112 symmetrical third needle roller sliding slot 113 and the 4th of the second needle roller sliding slot
Needle sliding slot 114 can further increase the fixed effect of the transmission device.
According to one embodiment of present invention, the transmission device for needle roller unlock further includes the first washer 50, the
One washer 50 is set on spool 10, and the first washer 50 is located at the second end of spacer ring 30, the first end of the first washer 50
Abut the second end of spacer ring 30.In other words, the first washer 50 is located at the one end of spacer ring 30 far from elastomeric element 40, i.e.,
The right end of spool 10, the first washer 50 abut spacer ring 30, and the movement of the first washer 50 can drive spacer ring 30 to move.By
This need not push directly on spacer ring 30 when being unlocked to supplying terminal and plug, and only need to push the first washer
50 can be realized the movement of spacer ring 30.First washer 50 can be prepared for metal material, by the way that the first washer is arranged
50, the stable structure of spacer ring 30 and safe to use can be protected to avoid directly active force is applied to spacer ring 30.
Accordingly, due to provided with the first washer 50, the first washer 50 is resisted against the right end of spacer ring 30, passes through promotion
First washer 50 can push spacer ring 30 to move, and according to one embodiment of present invention, the second mounting groove 312 is opening
Slot, the second mounting groove 312 are located at the opening of the second end of spacer ring 30 and the second mounting groove 312 against the first washer 50
First end.Needle roller 20 is located in the open slot of spacer ring 30 as a result, when the first washer 50 pushes spacer ring 30 to move,
Active force is directly conducted to spacer ring 30, and the first washer 50 can push needle roller 20 to move, but be effectively shielded from and rolled
It the conduction of needle 20 and rubs by force, does not interfere with normal sliding of the needle roller 20 in needle roller sliding slot 11, and the first washer 50 is
Metalwork, surface is smooth, keeps the sliding of needle roller 20 more smoothly.
Further, according to one embodiment of present invention, which further includes the second pad
Circle 60, second packing ring 60 is located between elastomeric element 40 and spacer ring 30, and the first end of second packing ring 60 abuts elastomeric element
40, the second end of second packing ring 60 abuts the first end of spacer ring 30.In other words, the left end and elastomeric element of spacer ring 30
Second packing ring 50 is set between 40 right end, and second packing ring 50 can be metalwork.The left end of spacer ring 30 is avoided as a result,
Directly it is connected with elastomeric element 40, can further protects spacer ring to avoid directly active force is applied to spacer ring 30
30 stable structure and safe to use.
Correspondingly, according to one embodiment of present invention, the first mounting groove 311 is open slot, and the first mounting groove 311 is located at
The first end of the first end of spacer ring 30 and the opening of the first mounting groove 311 against spacer ring 30.First mounting groove 311
Shape it is similar with the structure of the second mounting groove 312 in above-described embodiment, and corresponding technique effect is also similar, therefore no longer superfluous
It states.
It is understood that the selection of the elastomeric element 40 in the embodiment of the present invention is also not particularly limited, it can basis
It is reasonably selected, or the common structure of those of ordinary skill in the art.Optionally, one according to the present invention
Embodiment, elastomeric element 40 are spring.The elastomeric element 40 of the structure is not only simple in structure as a result, and is matched with abutting part 12
It is convenient to close, of low cost.
The medical gas supply device of embodiment includes according to a second aspect of the present invention：Supplying terminal, plug and according to above-mentioned reality
The transmission device for needle roller unlock described in example is applied, which is located between supplying terminal and plug.Due to according to this
The transmission device for needle roller unlock of inventive embodiments has above-mentioned technique effect, therefore, doctor according to the ... of the embodiment of the present invention
Also there is corresponding technique effect with feeder, i.e. the sliding in needle roller sliding slot 11 of needle roller 20 is more smooth, and use is more convenient,
And the structure requires preparation process relatively easy, reduces manufacturing cost.
In addition, other compositions of medical gas supply device according to the ... of the embodiment of the present invention such as supplying terminal and operation pair
All it is known for those of ordinary skill in the art, is not detailed herein.
To sum up, medical gas supply device according to the ... of the embodiment of the present invention, the transmission by assembly for needle roller unlock fills
It sets, needs the labyrinth that each part mutually links, transmission of the invention compared to the unlock of the needle roller of conventional medical supplying terminal
Device efficiently avoids the superposed force of phase mutual friction between each part, keeps the sliding in needle roller sliding slot 11 of needle roller 20 more smooth,
Using more convenient, and the structure requires preparation process relatively easy, reduces manufacturing cost.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiments or example in can be combined in any suitable manner.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art are not departing from the principle of the present invention and objective
In the case of can make changes, modifications, alterations, and variations to the above described embodiments within the scope of the invention.
Claims (6)
1. a kind of transmission device for needle roller unlock, which is characterized in that including：
Spool, the spool are formed as open column shape, and installation space is formed in the spool, inclination is formed on the spool
Ground penetrates through the periphery wall of the spool and the needle roller sliding slot of internal perisporium, and the first end of the spool is equipped with abutting part；
Needle roller, the needle roller is located on the spool and the first end of the needle roller passes through the needle roller sliding slot；
Spacer ring, the spacer ring are set on the spool and can be slided along the periphery wall of the spool, the isolation
Mounting groove is formed on washer, the second end of the needle roller is located in the mounting groove, and the needle roller is in the spacer ring
It is moved in the needle roller sliding slot under drive, the mounting groove is open slot, and the mounting groove includes being located at the spacer ring
First end the first mounting groove and be located at the spacer ring second end the second mounting groove；With
Elastomeric element, the elastomeric element are set on the spool and between the spacer ring and the abutting part,
The both ends of the elastomeric element are only against between the abutting part and the first end of the spacer ring respectively, and
First washer and second packing ring, and first washer is metalwork, first washer is set on the spool, institute
State that the first washer is located at the second end of the spacer ring and the opening of second mounting groove is against first washer
First end, the second packing ring are located between the elastomeric element and the spacer ring, and the second end of the second packing ring is supported
The opening of the first end of the spacer ring and first mounting groove is connect against the second end of the second packing ring.
2. the transmission device according to claim 1 for needle roller unlock, which is characterized in that between the needle roller sliding slot includes
First needle roller sliding slot and the second needle roller sliding slot arranged apart, the folder between the first needle roller sliding slot and the axle center of the spool
Angle is less than angle between the second needle roller sliding slot and the axle center of the spool, and the of the needle roller in the first needle roller sliding slot
Two ends are located in first mounting groove, and the second end of the needle roller in the second needle roller sliding slot is located at second mounting groove
It is interior.
3. the transmission device according to claim 2 for needle roller unlock, which is characterized in that needle roller sliding slot further includes:The
Three needle roller sliding slots and the 4th needle roller sliding slot, the third needle roller sliding slot and axis of the first needle roller sliding slot relative to the spool
The heart is symmetrical, and the 4th needle roller sliding slot and the second needle roller sliding slot are symmetrical relative to the axle center of the spool, first peace
Tankage and the second mounting groove are formed as the oval-shaped slot along the circumferentially extending of the spacer ring and first mounting groove and institute
The second end for stating the needle roller that the second mounting groove is parallel, in the third needle roller sliding slot is located in first mounting groove, and described
The second end of needle roller in four needle roller sliding slots is located in second mounting groove.
4. the transmission device according to any one of claim 1-3 for needle roller unlock, which is characterized in that the elasticity
Component is spring.
5. the transmission device according to claim 4 for needle roller unlock, which is characterized in that the abutting part is formed as edge
The annular flange of the first end of the spool to extend radially outwardly, and it is formed with screw thread on the peripheral surface of the abutting part.
6. a kind of medical gas supply device, which is characterized in that including：
Supplying terminal；
Plug；With
Transmission device according to any one of claims 1-5 for needle roller unlock, the transmission device are located at described
Between supplying terminal and the plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310222402.1A CN104208796B (en) | 2013-06-05 | 2013-06-05 | For the transmission device of needle roller unlock and with its medical gas supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310222402.1A CN104208796B (en) | 2013-06-05 | 2013-06-05 | For the transmission device of needle roller unlock and with its medical gas supply device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104208796A CN104208796A (en) | 2014-12-17 |
| CN104208796B true CN104208796B (en) | 2018-07-17 |
Family
ID=52090959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310222402.1A Active CN104208796B (en) | 2013-06-05 | 2013-06-05 | For the transmission device of needle roller unlock and with its medical gas supply device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104208796B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2083052U (en) * | 1991-02-08 | 1991-08-21 | 航空航天工业部第一研究院第一设计部 | Switching unit of air supply system |
| US6361348B1 (en) * | 2001-01-15 | 2002-03-26 | Tyco Electronics Corporation | Right angle, snap on coaxial electrical connector |
| CN102266639A (en) * | 2010-12-31 | 2011-12-07 | 北京谊安医疗系统股份有限公司 | Gas terminal and connecting device thereof |
| CN203315505U (en) * | 2013-06-05 | 2013-12-04 | 北京谊安医疗系统股份有限公司 | Gearing for roller unlocking and medical gas supply apparatus with same |
-
2013
- 2013-06-05 CN CN201310222402.1A patent/CN104208796B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2083052U (en) * | 1991-02-08 | 1991-08-21 | 航空航天工业部第一研究院第一设计部 | Switching unit of air supply system |
| US6361348B1 (en) * | 2001-01-15 | 2002-03-26 | Tyco Electronics Corporation | Right angle, snap on coaxial electrical connector |
| CN102266639A (en) * | 2010-12-31 | 2011-12-07 | 北京谊安医疗系统股份有限公司 | Gas terminal and connecting device thereof |
| CN203315505U (en) * | 2013-06-05 | 2013-12-04 | 北京谊安医疗系统股份有限公司 | Gearing for roller unlocking and medical gas supply apparatus with same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104208796A (en) | 2014-12-17 |
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