CN207463246U - A kind of cover - Google Patents

Abstract

The utility model discloses a kind of cover, which includes a channel and extracting parts, and wherein channel includes first end face, extracting parts includes a catch, catch includes a second end face contacted with channel first end face, wherein, first end face is different with the elasticity modulus of second end face；The utility model provides the cover that a kind of assembling is simple, sealing effect is good.

Description

A kind of cover

Technical field

The utility model is related to detect technical field of sealing technology, more specifically, it relates to a kind of cover.

Background technology

In detection field, cover is often used in the substances such as urine, the blood of storage detection, and in order to ensure to detect substance It is not leaked, needs to be sealed cover processing.Traditional cover achievees the purpose that sealing using small-sized O-ring seal, But assembling trouble, and sealing effect is also unreliable.

Utility model content

The utility model overcomes the deficiencies in the prior art, provides and a kind of facilitates installation, and the cover of sealed reliable.

The technical solution of the utility model is as follows：

A kind of cover, the cover include a channel and extracting parts, and wherein channel includes first end face, and extracting parts includes One catch, catch include a second end face contacted with channel first end face, wherein, the bullet of first end face and second end face Property modulus it is different.

Further, the elasticity modulus of first end face is less than the elasticity modulus of second end face, alternatively, the elasticity of second end face Modulus is less than the elasticity modulus of first end face.

Further, include including rough elements in rough elements or second end face in first end face.

Further, it is convex ribs positioned at the rough elements of first end face or the rough elements in second end face are Parting line.

Further, the first end face is circumferential end surfaces, and the convex ribs in first end face are ring-type.

Further, when convex ribs connect cooperation with extracting parts, the lower surface of convex ribs and the upper surface friction of catch are matched It closes so as to fulfill the sealing between channel and extraction unit.

Further, the material of first end face is PE or PP materials, and the material of second end face is ABS materials.

Further, the extracting parts includes syringe needle and syringe, wherein, catch is located at the connection of syringe needle and syringe Place.

Further, the channel is located in cover, the access portal containing first end face be located at cover inner surface it Under.

Further, syringe needle is located in channel, and syringe is located at outside channel.

The beneficial effects of the utility model are：By setting rough elements convex in the first end face of cover channel lower end Muscle is equipped with rough elements parting line in the second end face on extracting parts catch, because of the two elasticity modulus difference, when channel When second end face contact in first end face and catch, squeeze convex ribs, so as to allow extracting parts catch and channel the End face forms sealing, in this way, reducing number of assembling steps in process, while provides more structurally sound sealing.

Description of the drawings

Fig. 1 is the structure chart of the utility model；

Fig. 2 is the connection diagram of the utility model channel and headkerchief；

Fig. 3 is the structure diagram of the utility model extracting parts；

Fig. 4 is the first end face schematic diagram of the utility model channel；

Fig. 5 is the junction schematic diagram of the utility model headkerchief, channel and extracting parts；

Figure label：Channel 1, extracting parts 2, first end face 3, catch 4, second end face 5, convex ribs 6, parting line 7, opening 8, headkerchief 9, syringe needle 10, syringe 11, internal thread 12, external screw thread 13, anti-slip protrusion 14.

Specific embodiment

Below in conjunction with attached drawing, the specific technical solution of the utility model is further described.

Shown as shown in Figure 1, Figure 3 and Figure 4, a kind of cover, the cover includes a channel 1 and extracting parts 2, and wherein channel includes First end face 3, extracting parts 2 include a catch 4, and catch 4 includes a second end face 5 contacted with channel first end face 3, Wherein, first end face 3 is different with the elasticity modulus of second end face 5.

In the conventional technology, generally reach sealing to allow between extracting parts 2 and the first end face of channel 1, generally adopt With on catch 4 increase a small-sized sealing circle, when extracting parts 2 catch 4 and channel 1 first end face 3 contact when, Crush seal circle seals so as to which the catch 4 of extracting parts 2 be allowed to be formed with the first end face 3 of channel 1, and sealing here should be extremely It is liquid-tight envelope, preferably hermetic seal less.Such mode, be the increase in assembling the step of, increase step and accordingly increase Cost, in addition, increasing the chance that step increases product leakage risk.In addition to this, general additional sealing ring is all Silica gel or plastics, during assembling and squeezing, it may occur that deformation, so as to influence sealing effect, particularly, due to product There are one the deadline of hedge appreciation, the time limit inner seal ring may aging, so as to also increase the risk of leakage.

In the utility model, the second end face 5 and the first end face 3 of channel 1 that allow on catch 4 are in direct contact close to be formed Envelope, does not need to additional sealing ring（Silica gel or elastic seal ring）.In this way, reduce number of assembling steps in process, together When more structurally sound sealing is provided.

In some preferred modes, first end face 3 is different with the elasticity modulus of second end face 5, is because of two end faces Due to the difference of material, an end face is opposite to have rigidity, another end face is opposite to have elasticity, in setting, generally, bullet The elasticity modulus of property element is less than the elasticity modulus of non-elastic member.For example, when selecting plastics as face material, choosing With metal, such as iron, the material of steel or lead as catch 4, such plastics are under the power effect mutual with catch 4, plastic material First end face 3 elasticity modulus it is smaller than the elasticity modulus of catch 4, the mutual power of the two under similar circumstances, first end face 3 The change of shape easily occurs relatively, so as to more allow first end face 3 and the second end face 5 to be in close contact, so as to reach liquid The purpose of sealing.Optionally, the material of catch 4 and first end face 3 is all plastic material.For example, the material of first end face 3 is PE Or PP materials, the material of second end face 5 is ABS materials, on the contrary, the material of second end face 5 is PE or PP materials（The material of catch Matter）, the material of first end face 3 is ABS materials（The material of channel first end face）.Specifically, the material of first end face 3 for PE or PP materials, the material of second end face 5 is ABS materials.

In one more preferably mode, rough elements are included in first end face 3 or second end face 5.Roughness element The setting of part, allow the contact of two end faces when, rough elements is allowed to cooperate due to the mutual stress of two end faces, so as to Reach sealing.This is because the cooperation of the material of different elasticity, the cooperation of additional rough elements reach more under double action Stable sealing effect.Specifically, the rough elements in first end face be convex ribs 6, the roughness element in second end face Part is parting line 7.It is hollow among first end face 3, convex ribs 6 are annular in shape, and convex ribs 6 are fixedly connected with first end face 3, and convex ribs 6 are made It for a part for cover, is fit directly on the surface of first end face 3, there is no need to reassemble sealing when installation Part simplifies the assembling of structure.Specifically, parting line 7 be since the requirement of injection molding is formed, due to the presence of parting line 7, 5 both sides of second end face on catch 4 more or less have offset.When channel 1 connect cooperation with extracting parts 2, on channel 1 7 frictional fit of parting line on convex ribs 6 and catch 4 is so as to fulfill the sealing between channel 1 and extracting parts 2.

In some specific modes, channel 1 is located in cover, and the opening 8 on the channel 1 containing first end face 3 is located at Under cover inner surface.

In some specific modes, as shown in Fig. 2, cover further includes headkerchief 9,9 bottom of headkerchief connects with 1 top of channel It connects, it is preferable that the connection mode is is detachably connected.

In some specific modes, extracting parts 2 further includes syringe needle 10 and syringe 11, wherein, catch 4 is located at syringe needle 10 With the junction of syringe 11.

In some specific modes, internal thread 12 is equipped with close to the inner surface of channel 1 first end face 3, extracting parts 2 the The upper end outer surface of biend 5 is equipped with external screw thread 13, and channel 1 passes through the internal thread 12 and extraction unit on channel 1 with extracting parts 2 External screw thread 13 on part 2 is detachably connected.As shown in figure 5, when channel 1 is tightened by screw thread with extracting parts 2 and connect, extraction Second end face 5 on component 2 can squeeze the convex ribs 6 on channel 1 to play the role of sealing, make convex ribs 6 and extracting parts 2 On catch 4 fit closely, syringe needle 10 is located in channel 1 at this time, and syringe 11 is located at outside channel 1.

In some specific modes, the upper end outer surface of syringe 11 is along the circumferential direction set there are four anti-slip protrusion 14, is prevented Sliding convex block 14 equidistantly arranges, and when tightening or unscrewing extracting parts, energy increasing friction force prevents rubber sleeve.

The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art Art personnel without departing from the concept of the premise utility, can also make several improvements and modifications, these improvements and modifications Also it should be regarded as in scope of protection of the utility model.

Claims (10)

1. a kind of cover, which is characterized in that the cover includes a channel and extracting parts, and wherein channel includes first end face, carries Component is taken to include a catch, catch includes a second end face contacted with channel first end face, wherein, first end face and the The elasticity modulus of biend is different.

2. a kind of cover according to claim 1, which is characterized in that the elasticity modulus of first end face is less than second end face Elasticity modulus, alternatively, the elasticity modulus of second end face is less than the elasticity modulus of first end face.

3. a kind of cover according to claim 2, which is characterized in that include rough elements or second end in first end face Include rough elements on face.

4. a kind of cover according to claim 2, which is characterized in that positioned at first end face rough elements for convex ribs or The rough elements that person is located in second end face are parting line.

5. a kind of cover according to claim 4, which is characterized in that the first end face be circumferential end surfaces, first end face On convex ribs for ring-type.

6. a kind of cover according to claim 5, which is characterized in that when convex ribs connect cooperation with extracting parts, convex ribs Lower surface and catch upper surface frictional fit so as to fulfill the sealing between channel and extraction unit.

7. a kind of cover according to claim 2, which is characterized in that the material of first end face be PE or PP materials, second The material of end face is ABS materials.

8. a kind of cover according to claim 1, which is characterized in that the extracting parts includes syringe needle and syringe, wherein, Catch is located at the junction of syringe needle and syringe.

9. a kind of cover according to claim 1, which is characterized in that the channel is located in cover, contains first end face Access portal be located under cover inner surface.

10. a kind of cover according to claim 8, which is characterized in that syringe needle is located in channel, and syringe is located at outside channel.