CN209392507U - A kind of light-tight injector - Google Patents

Abstract

The utility model provides a kind of light-tight injector, belongs to the field of medical instrument technology.It is inconvenient for use and be protected from light the problems such as unreliable that it solves existing light-tight injector.This light-tight injector, including housing and lightshade cover, the front end of housing has Rule conehead, the rear end of housing has the gear edge of protrusion, lightshade cover is sleeved on the outside of housing, the front end of housing has the attachment base in a ring being arranged around Rule conehead, screw thread is provided on attachment base, there is annular space between attachment base and Rule conehead, the front end of lightshade cover, which has, is protected from light seat, it is protected from light the outside that cover for seat is mounted in attachment base, being protected from light on the medial surface of seat has retaining ring, the front end face of attachment base is resisted against on retaining ring, the rear end of lightshade cover has the flange of protrusion, gear edge folds against and fixes with flange.This light-tight injector has many advantages, such as reliably to be protected from light and easy to use.

Description

A kind of light-tight injector

Technical field

The utility model belongs to the field of medical instrument technology, is related to a kind of light-tight injector.

Background technique

Syringe is a kind of common medical apparatus, housing, piston and core bar is generally comprised, before piston is fixed on core bar End, and driven by core bar and twitched back and forth in housing, the front end of housing is provided with Rule conehead, and Rule conehead is for connecting injection Needle.Syringe jacket is generally made of polypropylene transparent material, can be suitable for suction or inject general drug.For some The drug that can be reacted under illumination condition needs to be protected from light syringe jacket processing.

Chinese patent literature data, which discloses, proposes a kind of light-tight injector, [application number: CN200720177916.X；It is public Accuse number: 201082283Y], including syringe, piston, push rod and needle holder, the barrel axis of syringe set up toroidal cavity, circle The height of inner cavity of height and syringe of annular groove is equal, and setting is protected from light plate in groove, and needle holder outer layer and syringe end are viscous Post the lightshade cover made of aluminium-foil paper.It is inserted into groove to make to be protected from light plate, being protected from light between plate and groove has gap, During syringe use, when the front end of syringe upward when, such as operating syringe exhaust, being protected from light plate may be from groove In skid off, so as to cause be protected from light plate be protected from light effect failure.It is protected from light made of aluminium-foil paper in the outer tire layer of needle holder simultaneously After set, the size of needle holder, which is changed, will lead to syringe needle and cannot connect with needle holder, even if syringe needle is connected in needle holder often It is light-exposed in pinhead seat position and react to may result in drug for the structure that lightshade cover can be destroyed.

Summary of the invention

The purpose of this utility model is in view of the above-mentioned problems existing in the prior art, to propose a kind of light-tight injector, solution Certainly the technical issues of is that light-tight injector how to be enable reliably to be protected from light and easy to use.

The purpose of this utility model can be realized by the following technical scheme:

The front end of a kind of light-tight injector, including housing and lightshade cover, the housing has Rule conehead, the housing Rear end has the gear edge of protrusion, which is characterized in that the lightshade cover is sleeved on the outside of housing, the front end of the housing have around The attachment base in a ring of Rule conehead setting, be provided with screw thread on the attachment base, the attachment base and Rule conehead it Between there is annular space, the front end of the lightshade cover, which has, is protected from light seat, the outside for being protected from light cover for seat and being mounted in attachment base, described to be protected from light seat Medial surface on there is retaining ring, the front end face of the attachment base is resisted against on retaining ring, and the rear end of the lightshade cover has protrusion Flange, the gear edge fold against and fix with flange.

It can connect injection needle or transfusion needle by Rule conehead and attachment base, can be extended with connecting intravenous infusion Pipe, setting screw thread makes to connect annular space that is stronger, being arranged between attachment base and Rule conehead on attachment base, for make injection needle or Needle stand insertion on transfusion needle or venous transfusion extension tube.It is protected from light the outside that cover for seat is mounted in attachment base, and the front end of attachment base Face is resisted against on retaining ring, makes the non-bulging front end face for being protected from light seat in the front end of attachment base, passes through the medicine being protected from light at seat protection attachment base Object, it is light-exposed when avoiding drug by attachment base to react.Fixation is folded against by flange and gear edge, and passes through attachment base and gear Circle against fixation, be connected and fixed housing and lightshade cover reliably, avoid syringe housing and lightshade cover during use It separates.This light-tight injector can be reliably protected from light and easy to use.

In above-mentioned light-tight injector, the groove with flange cooperation is provided on the front end face on the gear edge, it is described convex In edge insertion groove and the bottom surface of flange and groove is fixed.Groove has positioning action, facilitates the positioning and fixation of flange, makes outer Set and lightshade cover quick assembling are in place.

In above-mentioned light-tight injector, there is interconnecting piece on the rear end face of the flange, the interconnecting piece and groove Bottom surface is welded and fixed；Or there is interconnecting piece on the bottom surface of the groove, the rear end face of the interconnecting piece and flange is welded and fixed. Setting interconnecting piece is welded and fixed, and housing and lightshade cover is made to be connected firmly, and is conducive to improve the reliability that light-tight injector uses.

In above-mentioned light-tight injector, the fixing groove with gear along cooperation is provided on the rear end face of the flange, it is described Gear edge is embedded into fixing groove and gear edge and the bottom surface of fixing groove are fixed.Fixing groove has positioning action, facilitates the positioning of flange And fixation, make housing and lightshade cover quick assembling in place.

In above-mentioned light-tight injector, there is interconnecting piece, the interconnecting piece and fixing groove on the front end face on the gear edge Bottom surface be welded and fixed；Or there is interconnecting piece on the bottom surface of the fixing groove, the front end face on the interconnecting piece and gear edge welds It is fixed.Setting interconnecting piece be welded and fixed, so that housing and lightshade cover is connected firmly, be conducive to improve light-tight injector use it is reliable Property.

In above-mentioned light-tight injector, the flange and gear are along by being welded and fixed or the housing and lightshade cover are logical Cross double injection molding.Make housing and lightshade cover fixation in this way, prevents lightshade cover and housing in use process from separating.

In above-mentioned light-tight injector, the bulge loop of protrusion, the housing are provided on the medial surface of the housing rear end The tube port position of rear end is provided with chamfering.The setting of chamfering facilitates the insertion of piston and core bar, and the setting of bulge loop prevents piston and core Bar is dropped out out of housing, make syringe assembly and it is easy to use.

Compared with prior art, the utility model has the advantage that

Lightshade cover is sleeved on the outside of housing, and the rear end of lightshade cover has with housing gear along fixed flange is folded against, is protected from light The front end of set, which has, is protected from light seat, and Rule conehead peripheral hardware of housing sets the threaded attachment base of tool, is protected from light seat and is located at outside attachment base, and The front end face of attachment base is resisted against on the retaining ring for being protected from light seat, is protected from light so that attachment base is protected from light seat fixation and blocked, so that injection Device can be reliably protected from light and easy to use.Along upper setting groove, flange is embedded into groove gear, passes through the bottom of interconnecting piece and groove Face is welded and fixed, alternatively, fixing groove is arranged on flange, gear is along the bottom for being embedded into fixing groove, and passing through interconnecting piece and fixing groove Face is welded and fixed, and so that gear is positioned and is fixed conveniently along with flange, and be connected firmly, is conducive to the use of syringe.

Detailed description of the invention

Fig. 1 is the cross-sectional view of this light-tight injector embodiment one；

Fig. 2 is the assembling schematic diagram of this light-tight injector embodiment one housing and lightshade cover；

Fig. 3 is the A direction view in Fig. 1；

Fig. 4 is the cross-sectional view of this light-tight injector embodiment two；

Fig. 5 is the assembling schematic diagram of this light-tight injector embodiment two housings and lightshade cover.

In figure, 1, housing；1a, Rule conehead；1b, attachment base；1c, screw thread；1d, annular space；1e, gear edge；1f, groove；1g, Bulge loop；2, lightshade cover；2a, it is protected from light seat；2b, flange；2c, fixing groove；2d, retaining ring；3, core bar；4, piston；5, interconnecting piece.

Specific embodiment

It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further Description, but the utility model is not limited to these examples.

Embodiment one

As shown in Figure 1-Figure 3, a kind of light-tight injector, including housing 1, lightshade cover 2 and core bar 3, the front end setting of core bar 3 There is piston 4.Housing 1 is cylindrical, is made of transparent medical plastic.Rule conehead 1a is closed and be provided in the front end of housing 1, The through-hole being connected to 1 inner cavity of housing is provided on Rule conehead 1a, the lateral surface of Rule conehead 1a is tapered surface；After housing 1 The front end of end opening, core bar 3 is inserted into 1 inner cavity of housing from the outer end tube port position of housing 1, and the lateral surface of piston 4 and housing 1 Cavity wall face between formed sealing.Piston 4 is skidded off out of housing 1 in order to prevent, is provided with protrusion on the medial surface of 1 rear end of housing Bulge loop 1g, for the ease of piston 4 to be inserted into housing 1, the tube port position of 1 rear end of housing is provided with chamfering.The front end of housing 1 With the attachment base 1b in a ring being arranged around Rule conehead 1a, the medial surface of attachment base 1b and the lateral surface of Rule conehead 1a Between have annular space 1d.Screw thread 1c is provided on attachment base 1b, screw thread 1c can be set on the medial surface of attachment base 1b, screw thread 1c also can be set on the lateral surface of attachment base 1b.Lightshade cover 2 is cylindrical, is made of coloured plastics material, such as coloured PVC, PP or PE material has and is protected from light effect.Lightshade cover 2 is sleeved on the outside of housing 1, and the front end of lightshade cover 2, which is provided with, is protected from light a 2a, It is protected from light a 2a in a ring and is sleeved on the outside of attachment base 1b, being protected from light on a medial surface for the front end 2a has the retaining ring 2d of protrusion, The front end face of attachment base 1b is resisted against on retaining ring 2d, makes the non-bulging front end face for being protected from light a 2a in the front end of attachment base 1b, and fixed On retaining ring 2d.

Have the gear of protrusion along 1e on the lateral surface of the rear end of housing 1, gear, in class ellipse, in this way may be used along the cross section of 1e Occur to roll and fall from table when placing on the table to avoid syringe.Have on the lateral surface of the rear end of lightshade cover 2 convex Flange 2b out, flange 2b are similar along the shape of 1e with gear, and gear is folded against and fixed with flange 2b along 1e.Gear is along the front end face of 1e It is provided with the groove 1f with flange 2b cooperation, flange 2b insertion groove 1f is interior and flange 2b and the bottom surface of groove 1f are fixed.Flange There is interconnecting piece 5, interconnecting piece 5 and the bottom surface of groove 1f are welded and fixed on the rear end face of 2b；Or have on the bottom surface of groove 1f Interconnecting piece 5, interconnecting piece 5 and the rear end face of flange 2b are welded and fixed.Be provided on the front end face of flange 2b protrusion tread plate or Person's non-slipping block, when being injected using syringe, tread plate or non-slipping block have anti-skidding effect.On the rear end face of core bar 3 It is provided with tread plate or non-slipping block.

When assembling syringe, lightshade cover 2 is sleeved on to the outside of housing 1, and be embedded into flange 2b in groove 1f, then Ultrasonic bonding is carried out at interconnecting piece 5 fixes flange 2b and gear along 1e, then the core bar 3 for being equipped with piston 4 is inserted into outside In set 1.Any position on flange 2b rear end face or the bottom surface groove 1f can be set in interconnecting piece 5.Before welding, it connects Portion 5 is in the bulk or strip protruded；When welding, interconnecting piece 5 is melted；After welding, interconnecting piece 5 be annular surface or rounded face or Person's strip-shaped surface or dotted face.Lightshade cover 2 can also be integrally formed with housing 1 by double injection technique.The setting of groove 1f Make positioning when double injection and welding and is fixed conveniently.

It can connect injection needle or transfusion needle by Rule conehead 1a and attachment base 1b, it can be with connecting intravenous infusion with prolonging Long tube, and be mounted on syringe pump and injected.Screw thread 1c is arranged on attachment base 1b makes to connect stronger, attachment base 1b and Rule The annular space 1d being arranged between conehead 1a, for being inserted into the needle stand in injection needle or transfusion needle or venous transfusion extension tube.It keeps away Light seat 2a is sleeved on the outside of attachment base 1b, and the front end face of attachment base 1b is resisted against on retaining ring 2d, makes the front end of attachment base 1b The non-bulging front end face for being protected from light a 2a can protect the drug in housing 1 and at attachment base 1b by lightshade cover 2.Pass through flange 2b and gear fold against fixation along 1e, and keep housing 1 and lightshade cover 2 fixed reliably against fixation by attachment base 1b and retaining ring 2d, Avoiding syringe, housing 1 and lightshade cover 2 separate during use.This light-tight injector reliably can be protected from light and use It is convenient, it can preferably protect drug.

Embodiment two

As shown in Figure 4 and Figure 5, flange 2b is different with structure of the gear along 1e, and other structures are identical as implementing one.Flange 2b Cross section in class ellipse, the tread plate or non-slipping block of protrusion are provided on the front end face of flange 2b.Gear is in annulus along 1e Shape or its section are oval in class, and the fixing groove 2c cooperated with gear along 1e is provided on the rear end face of flange 2b, keep off embedding along 1e Enter into fixing groove 2c and keep off and is fixed along the bottom surface of 1e and fixing groove 2c.Gear has interconnecting piece 5, interconnecting piece along the front end face of 1e 5 are welded and fixed with the bottom surface of fixing groove 2c；Or there is interconnecting piece 5 on the bottom surface of fixing groove 2c, interconnecting piece 5 and gear are before 1e End face is welded and fixed.Interconnecting piece 5, which can be set, is keeping off any position on 1e front end face or the bottom surface fixing groove 2c.It is welding Before, interconnecting piece 5 is in the bulk or strip protruded；When welding, interconnecting piece 5 is melted；After welding, interconnecting piece 5 be annular surface or Person's rounded face or strip-shaped surface or dotted face.Lightshade cover 2 can also be integrally formed with housing 1 by double injection technique.Gu Determine slot 2c setting make double injection and welding when positioning and be fixed conveniently.

The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.

Claims (7)

1. the front end of a kind of light-tight injector, including housing (1) and lightshade cover (2), the housing (1) has Rule conehead The rear end of (1a), the housing (1) have the gear of protrusion along (1e), which is characterized in that the lightshade cover (2) is sleeved on housing (1) outside, the front end of the housing (1) has the attachment base (1b) in a ring being arranged around Rule conehead (1a), described It is provided on attachment base (1b) screw thread (1c), there is annular space (1d) between the attachment base (1b) and Rule conehead (1a), it is described The front end of lightshade cover (2), which has, to be protected from light seat (2a), and the outside for being protected from light seat (2a) and being sleeved on attachment base (1b) is described to be protected from light seat There is retaining ring (2d) on the medial surface of (2a), the front end face of the attachment base (1b) is resisted against on retaining ring (2d), the lightshade cover (2) rear end has the flange (2b) of protrusion, and the gear is folded against and fixed with flange (2b) along (1e).

2. light-tight injector according to claim 1, which is characterized in that it is described gear along (1e) front end face along be provided with The groove (1f) of flange (2b) cooperation, flange (2b) insertion groove (1f) is interior and the bottom surface of flange (2b) and groove (1f) are solid It is fixed.

3. light-tight injector according to claim 2, which is characterized in that have connection on the rear end face of the flange (2b) Portion (5), the interconnecting piece (5) and the bottom surface of groove (1f) are welded and fixed；Or there is connection on the bottom surface of the groove (1f) Portion (5), the interconnecting piece (5) and the rear end face of flange (2b) are welded and fixed.

4. light-tight injector according to claim 1, which is characterized in that be provided on the rear end face of the flange (2b) with Gear is along the fixing groove (2c) of (1e) cooperation, and the gear is embedded into fixing groove (2c) along (1e) and gear is along (1e) and fixing groove (2c) Bottom surface fix.

5. light-tight injector according to claim 4, which is characterized in that the gear has connection along the front end face of (1e) Portion (5), the interconnecting piece (5) and the bottom surface of fixing groove (2c) are welded and fixed；Or have on the bottom surface of the fixing groove (2c) Interconnecting piece (5), front end face of the interconnecting piece (5) with gear along (1e) are welded and fixed.

6. light-tight injector according to claim 1 or 2 or 4, which is characterized in that the flange (2b) and gear are logical along (1e) It crosses and is welded and fixed or the housing (1) and lightshade cover (2) pass through double injection and form.

7. -5 any light-tight injector according to claim 1, which is characterized in that the medial surface of housing (1) rear end On be provided with the bulge loop (1g) of protrusion, the tube port position of housing (1) rear end is provided with chamfering.