CN115350364B

CN115350364B - Hidden needle pen

Info

Publication number: CN115350364B
Application number: CN202210982747.6A
Authority: CN
Inventors: 胡琦; 段娟; 卓素艳; 王文静; 穆伦鸿; 王小寒
Original assignee: CHONGQING SHAPINGBA DISTRICT PEOPLE'S HOSPITAL
Current assignee: CHONGQING SHAPINGBA DISTRICT PEOPLE'S HOSPITAL
Priority date: 2022-08-16
Filing date: 2022-08-16
Publication date: 2023-06-23
Anticipated expiration: 2042-08-16
Also published as: CN115350364A

Abstract

The invention relates to the field of medical equipment, in particular to a needle-hiding pen, which comprises a pen body, a needle-hiding device and a needle head assembly, wherein the needle-hiding device comprises an inner cylinder, an outer cylinder and a spring, the inner cylinder and the outer cylinder are axially connected in a sliding manner, the inner cylinder comprises a first shell and a second shell, the first shell is rotationally sleeved on the outer side of the second shell, a sliding groove is formed in the inner wall of the second shell, a fixing rod is arranged in the outer cylinder, and a limiting sliding part sliding in the sliding groove is fixedly arranged on the fixing rod; the top end of the first shell is fixedly provided with a first cover plate, the first cover plate is provided with a first needle sleeve hole, the first needle sleeve hole comprises a first main hole and a first side hole, the top end of the second shell is fixedly provided with a second cover plate, the second cover plate is provided with a second needle sleeve hole, and the second needle sleeve hole comprises a second main hole and a second side hole; the needle hub on the needle head assembly comprises a needle hub body and a side strip positioned on the needle hub body. The needle head is exposed from the needle hiding device and the hand is stabbed in the needle taking sleeve process due to the fact that the inner barrel is retracted.

Description

Hidden needle pen

Technical Field

The invention relates to the field of medical instruments, in particular to a hidden needle pen.

Background

The hidden needle pen is used as an injection instrument for injecting the medicine into a body, so as to achieve the aim of treating diseases. The hidden needle pen comprises an electronic control mode and a non-electronic control mode, and is shown in combination with fig. 1, the electronic hidden needle pen is taken as an example, the existing electronic hidden needle pen comprises a pen body 1, a medicine inlet 3 is formed in the front end of the pen body 1, a card bottle filled with medicines is placed into the pen body through the medicine inlet 3, a spiral sleeve 2 is connected to the medicine inlet 3 in a threaded mode, a needle head assembly is arranged on the spiral sleeve 2, then a hidden needle device 4 is covered, and a cover body 5 is covered on the outer side of the hidden needle device 4. The needle assembly comprises a needle seat, a needle fixed on the needle seat and a needle sleeve covered on the needle, the needle is covered by the needle sleeve, the needle is protected, the needle is prevented from being polluted by the outside, and the needle is prevented from being accidentally pricked to a user.

The injection device is called a needle hiding pen because the injection device has the function of needle hiding, the function of needle hiding is realized mainly by a needle hiding device 4, and the needle hiding device 4 comprises an outer cylinder 41 and an inner cylinder 42, wherein the outer cylinder 41 is sleeved on the outer side of the inner cylinder 42, the inner cylinder 42 can slide downwards relative to the outer cylinder 41, and a spring (the spring is positioned inside the outer cylinder 41 and is not shown in fig. 2) which enables the inner cylinder 42 to extend from the top end of the outer cylinder 41 is connected between the outer cylinder 41 and the inner cylinder 42. When the needle hiding device 4 is arranged on the pen body 1, the inner cylinder 42 of the needle hiding device 4 extends out of the outer cylinder 41 under the action of the spring, the inner cylinder 42 covers the needle, the needle cannot be exposed and hidden, so that the needle is hidden during injection, anxiety and discomfort of a patient, particularly children, caused by fear of the needle can be reduced, and the injection is easier. When the injection is carried out, after the top end of the inner cylinder 42 of the needle hiding device 4 is contacted with and propped against the skin, the inner cylinder 42 compresses the spring, the inner cylinder 42 is retracted into the outer cylinder 41, so that the needle blocked by the inner cylinder 42 is penetrated out, and the needle is penetrated into the human body.

After the needle head assembly is arranged on the spiral sleeve 2 and the needle hiding device 4 is arranged on the pen body 1, the needle sleeve needs to be pulled out from the needle head during injection, and the correct pulling-out action is to hold the pen body 1 by one hand and hold the part of the needle sleeve extending out from the needle hiding device 4 by the other hand. However, for the elderly or children, when the operation is not standard, the hidden needle device 4 may be held by the hand during the process of pulling out the needle sheath, instead of holding the pen body 1, and since the hidden needle device 4 can be contracted, when the hidden needle device 4 is held by the hand, the hidden needle device 4 may be shortened under the action of the hand holding, so that the length of the needle sheath exposed from the hidden needle device 4 becomes longer, and thus the needle head may be exposed from the hidden needle device 4 during the process of pulling out the needle sheath from the needle head, and if the user is not careful slightly, the exposed needle head may stab the hand.

Disclosure of Invention

The invention aims to provide a needle hiding pen so as to solve the problem that a needle head is exposed from a needle hiding device and a hand is stabbed due to retraction of an inner barrel in a needle sheath taking process.

In order to achieve the above purpose, the invention adopts the following technical scheme: the hidden needle pen comprises a pen body, a hidden needle device and a needle head assembly, wherein the hidden needle device and the needle head assembly are arranged at the front end of the pen body, the hidden needle device comprises an inner barrel, an outer barrel and a spring, the outer barrel is sleeved on the outer side of the inner barrel, the inner barrel and the outer barrel are axially connected in a sliding mode, the spring is arranged in the outer barrel and enables the inner barrel to extend out of the outer barrel, the inner barrel comprises a first shell and a second shell, the first shell is sleeved on the outer side of the second shell and is in running fit with the outer barrel, a sliding groove is formed in the inner wall of the second shell, the sliding groove comprises an inclined section, a fixing rod is arranged in the outer barrel, a limit sliding part which slides in the sliding groove is fixedly arranged on the fixing rod, and when the inner barrel is in a natural extending state from the outer barrel, the limit sliding part is positioned at the bottom of the inclined section;

the top end of the first shell is fixedly provided with a first cover plate, the first cover plate is provided with a first needle sleeve hole, the first needle sleeve hole comprises a first main hole and a first side hole which are communicated with each other, the top end of the second shell is fixedly provided with a second cover plate, the second cover plate is provided with a second needle sleeve hole, the second needle sleeve hole comprises a second main hole and a second side hole which are communicated with each other, and when the inner barrel is in a natural extending state from the outer barrel, the first needle sleeve hole is opposite to the second needle sleeve hole;

the needle sleeve on the needle head assembly comprises a needle sleeve body and a side bar positioned outside the needle sleeve body, when the needle head assembly is positioned in the needle hiding device, the needle sleeve body passes through the first main hole and the second main hole, and the side bar passes through the first side hole and the second side hole.

The principle and the advantages of the scheme are as follows: the fixed rod is arranged inside the outer cylinder, and the position of the limiting sliding part cannot move. The inclined section and the limit sliding part of the chute of the second shell form a structure similar to a cylindrical cam, the cylindrical cam structure can change linear motion into circumferential rotation, so that when the inner cylinder slides relative to the outer cylinder, the second shell moves, the second shell rotates in a state that the inclined section and the limit sliding part of the chute are mutually matched, the second shell drives the second cover plate to rotate together when the second shell rotates, the first cover plate does not rotate, and the second cover plate and the first cover plate rotate relatively.

When the needle head assembly is located in the needle hiding device, the needle sleeve body passes through the first main hole and the second main hole, the side bar passes through the first side hole and the second side hole, the side bar is clamped in the first side hole and the second side hole at the same time, the second cover plate and the first cover plate are locked by the needle sleeve, so that the second cover plate and the first cover plate cannot rotate relatively, the second shell cannot rotate, even if the inner barrel is touched by the outside, the second shell cannot rotate, the limiting sliding part cannot slide in the inclined section of the sliding groove, the bottom of the inclined section of the sliding groove and the limiting sliding part are clamped, and the inner barrel cannot move relative to the outer barrel and fall back into the outer barrel. Thus, in the process of pulling the whole needle sleeve out of the needle head, as long as the needle sleeve is not completely separated from the hidden needle device, the side bars can be simultaneously clamped in the first side holes and the second side holes, the second cover plate and the first cover plate are locked by the needle sleeve, the second shell can not rotate, the inner barrel can not be retracted into the outer barrel, the hidden needle device can not be shortened, and the condition that the hand is exposed and stabbed by the needle head, which is caused by the fact that the hidden needle device is possibly shortened due to holding of the hidden needle device in the process of pulling out the needle sleeve or before pulling out the needle sleeve, is avoided.

After the needle sleeve is pulled down and is completely separated from the needle hiding device, the first side hole and the second side hole are separated from the limit of the side bar, the second shell is restored to a state capable of freely rotating, the inner cylinder can be retracted into the outer cylinder, and the needle hiding device can be freely contracted, so that the following injection operation cannot be influenced.

Through this scheme, the needle cover is in the extraction process, as long as the needle cover does not break away from the hidden needle device completely, the inner tube just can not fall back to in the urceolus for hidden needle device is in the dead state of lock, and hidden needle device can not shrink, has avoided because holding hidden needle device and has caused hidden needle device shrink and make the condition that the syringe needle exposes the stabbing hand in the needle cover extraction in-process or before the needle cover is extracted, has improved safety in utilization greatly. After the needle sleeve is completely separated from the needle hiding device, the needle hiding device automatically releases the locking state, and the needle hiding device can be contracted, so that the subsequent normal use is not affected.

Preferably, as an improvement, the outer cylinder comprises a cylinder seat and a cylinder cover, the cylinder cover is covered on the cylinder seat, a first through hole which can enable the inner cylinder to pass through is formed in the cylinder cover, a sliding ring is fixedly arranged on the outer wall of the first shell, a sliding cavity is formed in the cylinder seat, a second through hole which is communicated with the sliding cavity is formed in the bottom of the cylinder seat, the sliding ring is slidably connected in the sliding cavity, the top of the sliding ring can be abutted against the cylinder cover, the bottom of the sliding ring can be abutted against the bottom of the sliding cavity, and a spring is connected between the bottom of the sliding cavity and the sliding ring. The sliding ring thus slides in the sliding chamber, and the spring exerts a pressure on the sliding ring, thereby indirectly exerting an elastic force on the first housing. The bottom of cover and sliding chamber can offset with the slip ring respectively to can restrict the slip stroke of inner tube, avoid the inner tube to break away from the urceolus.

Preferably, as an improvement, the cylinder cover and the cylinder seat are detachably connected, the cylinder seat is provided with a clamping groove, the cylinder cover is provided with a clamping block, and the clamping block is clamped in the clamping groove. Therefore, the cylinder cover and the cylinder seat are designed to be detachably connected in consideration of the assembly and assembly requirements, and after the structures such as the inner cylinder and the spring are installed in the cylinder seat, the structures such as the inner cylinder and the spring cannot fall off from the outer cylinder after being assembled in the outer cylinder by covering the cylinder cover on the cylinder seat. The clamping block and the clamping groove are detachably connected, so that the installation is convenient.

Preferably, as an improvement, the cylinder seat is provided with a fixed rod seat positioned at the bottom of the sliding cavity, the fixed rod seat is provided with an inserting hole, and the fixed rod is inserted in the inserting hole. Thus, by inserting the fixing lever into the insertion hole, the fixing lever can be fitted to the cartridge. Through designing the dead lever seat, the thickness of dead lever seat is great, can improve the degree of depth of jack, and the dead lever is located the dead lever seat after inserting the jack like this, and is more stable.

Preferably, as a modification, the number of the fixing rods is at least two, and the plurality of fixing rods are uniformly distributed around the axis of the inner cylinder. Therefore, when the inner cylinder is pressed by the outside, the limiting sliding parts on the fixing rods slide in the corresponding sliding grooves, the matching stress of the sliding grooves and the limiting sliding parts is uniform, and the inner cylinder moves relatively smoothly relative to the outer cylinder.

Preferably, as a modification, the number of the first side holes is plural and uniformly arranged around the first main hole; the number of the second side holes is multiple, and the second side holes are uniformly arranged around the second main holes; the lateral strips are in a plurality and are uniformly arranged around the needle sleeve body; the number of side bars, the number of first side holes and the number of second side holes are equal. The needle sleeve body is provided with a plurality of side bars which are uniformly distributed, the shape of the needle sleeve is regular, and the appearance is attractive.

Preferably, as an improvement, an annular groove is formed in the inner wall of the first shell, and a clamping ring is arranged on the outer wall of the second shell and is clamped in the annular groove. Therefore, under the action of the clamping ring and the annular groove, the first shell and the second shell cannot be separated, the two shells can be guaranteed to move together, and meanwhile relative rotation between the second shell and the first shell cannot be influenced.

Preferably, as an improvement, the first shell comprises two parts, and the first shell is formed by buckling the two parts. Therefore, the first shell is divided into two parts, and the second shell can be mounted inside the first shell in a buckling manner, so that the clamping ring can be mounted in the annular groove.

Preferably, as a modification, the fixing rod is made of metal. Therefore, the fixing rod is hard and is not easy to deform and bend under the stress.

Preferably, as an improvement, the hidden stylus is an electronic hidden stylus with a voice reminding function.

Therefore, the invention can be applied to the electronic hidden stylus. The electronic hidden stylus has a voice reminding function, can send out voice reminding applicable to different user groups, such as an old people mode, and can broadcast operation using steps in a large volume; child mode, child song can be played, attention of the child is transferred, interestingness is increased, and coordination degree of the child is increased; the child student mode can record the prompt tone of parents, is used for reminding the child patients in the resident school, reduces separation anxiety and improves use happiness; in the conventional mode, each step uses a key to prompt the operation to be performed next.

Drawings

Fig. 1 is a perspective view of a hidden stylus.

Fig. 2 is a perspective view of the hidden needle device.

Fig. 3 is a vertical cross-sectional view of the hidden needle device.

Fig. 4 is a perspective view of the second housing.

Fig. 5 is a perspective view of the first housing.

Fig. 6 is a perspective view of the needle assembly.

Fig. 7 is a system block diagram of a voice alert system in embodiment 2.

Fig. 8 is a system block diagram of a voice alert system in embodiment 3.

Fig. 9 is a bottom view of the second housing, mainly illustrating the sectional shape of the chute.

Fig. 10 is an expanded schematic view of the second housing, mainly illustrating the trend of the chute.

Detailed Description

The following is a further detailed description of the embodiments:

reference numerals in the drawings of the specification include: the pen body 1, the screw sleeve 2, the medicine inlet 3, the needle hiding device 4, the outer cylinder 41, the inner cylinder 42, the cover body 5, the needle sleeve body 50, the side bar 51, the needle seat 52, the injection button 6, the mode selection button 7, the screen 8, the reset button 9, the exhaust button 10, the switch button 11, the setting button 12, the cylinder seat 100, the cylinder cover 101, the clamping block 102, the second through hole 103, the sliding cavity 104, the spring 105, the first shell 106, the second shell 107, the clamping ring 108, the sliding groove 109, the first main hole 110, the first side hole 111, the second main hole 112, the second side hole 113, the sliding ring 114, the sliding block 115, the guide groove 116, the fixing rod 117 and the limit sliding part 118.

Example 1

Substantially as shown in figures 1 to 6, 9 and 10: the utility model provides a hidden needle pen, can be the hidden needle pen of electron, also can be the hidden needle pen of non-electron, including the body 1, pen cap, be located hidden needle device 4 and the syringe needle subassembly of body 1 front end, the front end of body 1 is equipped with into medicine mouth 3, and the 3 play of medicine mouth is equipped with spiral cover 2, and hidden needle device 4 and pen cap can both be covered on the front end of body 1. The needle assembly includes a hub 52, a needle fixedly disposed on the hub 52, and a needle hub disposed over the needle. Mounting of the needle assembly to the pen body 1 is achieved by mounting the hub 52 on the top end of the screw sleeve 2. After the needle head assembly is arranged on the spiral sleeve 2, the needle hiding device 4 is covered at the front end of the pen body 1, the needle head and the needle sleeve are both positioned in the needle hiding device 4, wherein the length of the needle sleeve is larger than that of the needle head, and the needle sleeve extends out from the top end of the needle hiding device 4. The above structures are prior art, and specific details are not described herein.

The invention point of the application is to improve the structure of the needle hiding device 4 and the structure of the needle sleeve, in particular to:

as shown in fig. 2 to 3, the needle hiding device 4 includes an inner cylinder 42, an outer cylinder 41, and a spring 105, and the outer cylinder 41 is sleeved outside the inner cylinder 42. Referring to fig. 2, the inner tube 42 includes a first housing 106 and a second housing 107, the first housing 106 has a cylindrical overall shape, a first cover plate is integrally formed at the top, a sliding ring 114 is integrally formed at the outer side of the first housing 106, the sliding ring 114 and the first housing 106 are coaxially arranged, and four sliding blocks 115 with uniformly distributed circumferences are integrally formed on the side wall of the sliding ring 114. An annular groove is provided on the inner wall of the first housing 106. As shown in fig. 5, the first housing 106 in this embodiment is formed by buckling two symmetrical parts, so the first housing 106 can be split into two pieces, and the first housing 106 is designed to be formed by buckling two pieces, which allows for convenience in assembling the first housing 106 and the second housing 107, thereby facilitating assembling the first housing 106 and the second housing 107 together.

As shown in fig. 2 and 4, the second housing 107 in this embodiment is cylindrical and has a second cover plate integrally formed at the top, a snap ring 108 is integrally formed at the outer side of the second housing 107, and the snap ring 108 is clamped in an annular groove on the inner wall of the first housing 106, so that the first housing 106 is sleeved on the outer side of the second housing 107 and is in rotational fit with the second housing 107, and a rotational gap is formed between the first housing 106 and the second housing 107.

Referring to fig. 3, the outer cylinder 41 includes a cylinder base 100 and a cylinder cover 101 detachably connected to the top of the cylinder base 100, and specifically, the detachable manner is as follows: a clamping groove is formed around the top end of the cylinder seat 100, a clamping block 102 is integrally formed on the circumference of the cylinder cover 101, and the clamping block 102 is clamped in the clamping groove. The first housing 106 is axially slidably engaged with the outer cylinder 41 in the following manner: the inside of cartridge holder 100 is equipped with circular shape sliding chamber 104, be equipped with first through-hole on the cover 101, be equipped with the second through-hole 103 that is located sliding chamber 104 below on the cartridge holder 100, second through-hole 103 all communicates with sliding chamber 104 is coaxial, the diameter of first through-hole and the diameter of second through-hole 103 all are less than sliding chamber 104's diameter, first casing 106 passes the first through-hole of cover 101, the outer wall of first casing 106 pastes with the inner wall of first through-hole, slip ring 114 slides and establishes in sliding chamber 104, be equipped with four vertical guide slots 116 on the inner wall of sliding chamber 104, four guide slots 116 circumference evenly distributed on sliding chamber 104 inner wall, slider 115 vertical slip is located guide slot 116. The spring 105 is connected at both ends to the bottom of the sliding chamber 104 and to the sliding ring 114, respectively. In this embodiment, the outer diameter of the spring 105 is slightly smaller than the diameter of the sliding cavity 104, and the inner diameter of the spring 105 is slightly larger than the outer diameter of the first housing 106.

As shown in fig. 3 and 10, the inner wall of the second housing 107 is provided with a chute 109, and the chute 109 includes a vertical section and an inclined section, the vertical section and the inclined section are communicated, the vertical section is located at the bottom of the inclined section, and the vertical section extends all the way down to the bottom of the second housing 107. The outer cylinder 41 is provided with a fixing rod seat integrally formed at the bottom, the fixing rod seat is provided with an inserting hole, vertical fixing rods 117 are inserted in the inserting hole, the number of the fixing rods 117 is at least two, a plurality of fixing rods 117 are uniformly distributed around the axis of the outer cylinder, and the number of the fixing rods 117 in the embodiment is two. The fixing rod 117 is made of steel, has high hardness, and cannot be deformed. The fixed rod seat is arranged, so that the thickness of the bottom of the sliding cavity 104 can be increased by arranging the fixed rod seat, thereby increasing the depth of the jack and further ensuring that the fixed rod is inserted into the jack more stably. The top ends of the fixing rods 117 are integrally formed with the limit sliding parts 118 sliding in the sliding grooves 109, and the number of the sliding grooves 109 is equal to that of the fixing rods 117, so that in the embodiment, the number of the sliding grooves 109 is two, the limit sliding parts 118 on the two fixing rods 117 respectively slide in the corresponding sliding grooves 109, and the directions of the two sliding grooves 109 are the same as shown in fig. 10. The vertical section is provided in this embodiment so as to extend downward to the bottom of the second housing 107, because the limit slider 118 can be naturally entered through the bottom of the vertical section when the inner cylinder 42 is installed downward into the outer cylinder 41 after the fixing lever 117 is installed to the cylinder block 100, which is also provided in consideration of the convenience of assembly of the limit slider 118 and the chute 109. As shown in fig. 9, in the present embodiment, the cross-sectional shape of the chute 109 is L-shaped, and the limit sliding portion 118 is correspondingly L-shaped, so that the limit sliding portion 118 can be laterally clamped in the chute 109 and cannot be separated from the chute 109.

As shown in fig. 3 and 5, the first cover plate is provided with a first sleeve hole, which includes a first main hole 110 and a first side hole 111 that are communicated with each other, and the first side hole 111 has a plurality of holes and surrounds the first main hole 110.

As shown in fig. 3 and 4, the second cover plate is provided with a second needle sheath hole, which includes a second main hole 112 and a second side hole 113 that are communicated with each other, and the number of the second side holes 113 is plural and surrounds the second main hole 112. The number of the first side holes 111 and the second side holes 113 is the same, and in this embodiment, the number of the first side holes 111 and the second side holes 113 is four.

When the inner tube 42 is in a natural extension state from the outer tube 41 (the natural extension state means that the inner tube 42 is not subjected to external pressure, and the spring 105 is in the longest state, and the limit sliding portion 118 is located at the bottom end of the inclined section of the chute), the first needle sleeve hole is opposite to the second needle sleeve hole, that is, the first main hole 110 is opposite to the second main hole 112, and the first side hole 111 is opposite to the second side hole 113.

Referring to fig. 6, the needle assembly includes a needle holder 52, a needle disposed on the needle holder 52, and a needle sheath sleeved outside the needle, the needle sheath in this embodiment includes a needle sheath body 50 and side bars 51 integrally formed outside the needle sheath body 50, the number of the side bars 51 is four, the four side bars 51 are uniformly distributed around the needle sheath body 50, and the length of the side bars 51 is equal to the length of the needle sheath body 50. Since the needle sheath is sleeved on the needle, the length of the needle sheath is longer than that of the needle. When the needle assembly is positioned in the needle hiding device 4, the needle cover body 50 passes through the first main hole 110 and the second main hole 112, the side strip 51 passes through the first side hole 111 and the second side hole 113, and the side edge of the side strip 51 is propped against the inner wall of the first side hole 111 and the inner wall of the second side hole 113 at the same time. The length of the needle is smaller than the length of the needle sleeve and the end of the needle is located in the space between the top end of the inner barrel 42 and the top end of the outer barrel 41 when the needle is in the needle retracting device 4.

The specific implementation process is as follows: initially, the hub 52 of the needle assembly is mounted on the end of the screw cap 2 which is covered by the needle, the needle cap extending from the top end of the needle hider 4, the end of the needle being located in the space between the top end of the inner barrel 42 and the top end of the outer barrel 41, the needle cap 50 passing through the first and second

main apertures

110, 112 and the side strip 51 passing through the first and

second side apertures

111, 113. Since the side edges of the side bars 51 are abutted against the inner walls of the first side holes 111 and the second side holes 113 at the same time, the second cover plate and the first cover plate are clamped by the side bars 51 at the same time, the second cover plate and the first cover plate cannot rotate relatively, the second housing 107 cannot rotate, and the second housing 107 is in a locking state. Thus, even if the inner cylinder 42 is touched by the outside, the second housing 107 cannot rotate, the bottom end of the inclined section of the chute 109 and the limit sliding portion 118 are locked in the vertical direction in fig. 3, the second housing 107 cannot move relative to the first housing 106 and retract into the outer cylinder 41, and at this time, the needle hiding device 4 is in a locked state, and the needle hiding device 4 cannot shrink.

In use, the needle sheath is first withdrawn, and during the withdrawal process, the needle sheath body 50 slides upwardly in the first main bore 110 and the second main bore 112, and the side bar 51 slides upwardly in the first side bore 111 and the second side bore 113. In the process of extracting the needle sleeve, as long as the needle sleeve is not completely separated from the hidden needle device 4, namely, the needle sleeve is not completely pulled out from the top of the inner cylinder 42, the side bar 51 is simultaneously clamped in the first side hole 111 and the second side hole 113, the second cover plate and the first cover plate are locked by the needle sleeve, the second shell cannot rotate, the inner cylinder 42 cannot retract into the outer cylinder 41, the hidden needle device 4 cannot be shortened, and the condition that the needle head possibly exposes a stab hand due to shortening of the hidden needle device 4 caused by holding the hidden needle device 4 in the process of extracting the needle sleeve or before extracting the needle sleeve is avoided.

After the needle sheath is pulled out and is completely separated from the hidden needle device 4, the first side hole 111 and the second side hole 113 are separated from the limit of the side bar 51, the second shell 107 is restored to a state capable of freely rotating, and at the moment, when the inner cylinder 42 is pressed, the second shell 107 can rotate, so that the inclined section of the sliding groove 109 and the limit sliding part 118 can slide relatively, the inclined section of the sliding groove 109 and the limit sliding part 118 cannot be blocked, the inner cylinder 42 can be retracted into the outer cylinder 41, and the hidden needle device 4 can be freely contracted, so that the injection operation can be normally performed.

Example 2

Referring to fig. 7, the needle hiding device 4 of embodiment 1 is applied to an electronic needle hiding pen with a voice reminding function, wherein the voice reminding system comprises a power supply, a controller, a memory interface, a speaker and a sensor, wherein the controller, the speaker and the power supply are all located inside the pen body 1. The memory interface, speaker and sensor are all electrically connected to the controller. The memory interface is connected with a memory card, the memory card is an SD card, and corresponding audio is stored in the memory card. The controller in this embodiment is a single-chip microcomputer, and the single-chip microcomputer is a TC89C52 single-chip microcomputer or a C8051F020 single-chip microcomputer, and of course, other types of single-chip microcomputers can be selected. The sensor is located at the front end of the pen body 1 and is used for sensing whether the pen cover is opened, and the sensor can be a position switch (such as a button type position switch) or a pressure sensor. The power supply is a lithium battery, and the battery supplies power for the whole voice reminding system. The content of the voice prompt can be set according to different people (the setting method can be that different voice contents are stored in the SD card), for example: for the old people, the operation using steps can be broadcasted at high volume, and the steps of injection, medicine changing, needle changing and disinfection can be broadcasted circularly; for infant crowds, children songs can be played, the attention of children is transferred, the interestingness is increased, and the coordination degree of infants is increased; for the children student crowd, the prompt tone of parents can be recorded for reminding the use steps of the children patients in the resident school, so that separation anxiety is reduced, and using happiness is improved; for the general population, after each step of using the key, the operation needed to be performed next is prompted.

The sensor is located the front end of the pen body 1 for detect whether the pen cap is taken off, when the pen cap is located the front end of the pen body 1, whole pronunciation warning system can not make sound when not working this moment. When the pen cap is required to be used and removed, the sensor detects that the pen cap is removed, the sensor transmits signals to the controller, and the controller receives the signals and sends out instructions, so that the loudspeaker automatically sends out sound according to the audio frequency stored in the memory card, and the voice reminding function is realized.

Example 3

As shown in fig. 1 and 8, on the basis of embodiment 2, the voice prompt system further includes a mode selection button 7 (membrane button), the mode selection button 7 being electrically connected to the controller; the controller can be controlled through the mode selection button 7, so that different voice reminding modes can be selected, and after the different voice reminding modes are selected, when the cover body 5 is opened, the loudspeaker can emit sound of the corresponding modes. The voice alert mode includes any two, three or four of an elderly mode, a child student mode or a regular mode. The middle-aged mode, the infant mode, the child student mode and the conventional mode are all provided, so that when in use, different modes can be selected according to different using groups, the mode selection button 7 is pressed in advance, the mode selection button 7 transmits signals to the controller, after the controller selects different modes, the controller can send corresponding voice reminding contents when the cover body 5 is opened when in use, for example: the senile mode is selected, so that the operation using steps can be broadcasted in large volume, and the steps of injection, medicine changing, needle changing and disinfection can be broadcasted circularly; the infant mode is selected, so that the child song can be played, the attention of the child is transferred, the interestingness is increased, and the coordination degree of the infant is increased; the child student mode is selected, and the child student mode can record the prompt tone of parents and is used for reminding the use steps of the child patients in the resident school, so that separation anxiety is reduced, and using happiness is improved; the normal mode is selected, and each step uses the key to prompt the operation needed to be performed next.

The foregoing is merely exemplary of the present invention, and specific technical solutions and/or features that are well known in the art have not been described in detail herein. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present invention, and these should also be regarded as the protection scope of the present invention, which does not affect the effect of the implementation of the present invention and the practical applicability of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims

1. The utility model provides a hidden needle pen, includes the pen body, is located hidden needle device and the syringe needle subassembly of pen body front end, hidden needle device includes inner tube, urceolus and spring, the urceolus cover is in the outside of inner tube, inner tube and urceolus axial sliding connection, the spring is located the urceolus inside and makes the inner tube stretch out from the urceolus, its characterized in that: the inner barrel comprises a first shell and a second shell, the first shell is sleeved on the outer side of the second shell and is in running fit with the second shell, the first shell is in sliding fit with the outer barrel, a sliding groove is formed in the inner wall of the second shell, the sliding groove comprises an inclined section, a fixing rod is arranged in the outer barrel, a fixing rod seat is integrally formed in the bottom of the outer barrel, an inserting hole is formed in the fixing rod seat, the fixing rod is inserted into the inserting hole, a limiting sliding part sliding in the sliding groove is arranged on the fixing rod, and when the inner barrel is in a natural extending state from the outer barrel, the limiting sliding part is positioned at the bottom of the inclined section;

the top end of the first shell is fixedly provided with a first cover plate, the first cover plate is provided with a first needle sleeve hole, the first needle sleeve hole comprises a first main hole and a first side hole which are communicated with each other, the top end of the second shell is fixedly provided with a second cover plate, the second cover plate is provided with a second needle sleeve hole, the second needle sleeve hole comprises a second main hole and a second side hole which are communicated with each other, and the first needle sleeve hole is opposite to the second needle sleeve hole when the inner cylinder is in a natural extending state from the outer cylinder;

the needle sleeve on the needle head assembly comprises a needle sleeve body and a side bar positioned outside the needle sleeve body, when the needle head assembly is positioned in the needle hiding device, the needle sleeve body passes through the first main hole and the second main hole, the side bar passes through the first side hole and the second side hole, the side edge of the side bar is propped against the inner walls of the first side hole and the second side hole, and the second cover plate and the first cover plate are simultaneously clamped by the side bar.

2. A hidden stylus according to claim 1, wherein: the outer cylinder comprises a cylinder seat and a cylinder cover, wherein the cylinder cover is arranged on the cylinder seat and is provided with a first through hole through which the inner cylinder can pass, a sliding ring is fixedly arranged on the outer wall of the first shell, a sliding cavity is arranged in the cylinder seat, a second through hole communicated with the sliding cavity is arranged at the bottom of the cylinder seat, the sliding ring is slidably connected in the sliding cavity, the top of the sliding ring can be abutted against the cylinder cover, the bottom of the sliding ring can be abutted against the bottom of the sliding cavity, and the spring is connected between the bottom of the sliding cavity and the sliding ring.

3. A hidden stylus according to claim 2, wherein: the cylinder cover is detachably connected with the cylinder seat, the cylinder seat is provided with a clamping groove, the cylinder cover is provided with a clamping block, and the clamping block is clamped in the clamping groove.

4. A hidden stylus according to claim 2, wherein: the fixed rod seat is positioned on the cylinder seat.

5. A hidden stylus according to claim 4, wherein: the number of the fixing rods is at least two, and the fixing rods are uniformly distributed around the axis of the inner cylinder.

6. A hidden stylus according to claim 1, wherein: the number of the first side holes is multiple, and the first side holes are uniformly arranged around the first main hole; the second side holes are uniformly arranged around the second main hole, and the second side holes are multiple in number; the side bars are arranged in a plurality and uniformly arranged around the needle sleeve body; the number of side bars, the number of first side holes and the number of second side holes are equal.

7. A hidden stylus according to claim 1, wherein: an annular groove is formed in the inner wall of the first shell, a clamping ring is arranged on the outer wall of the second shell, and the clamping ring is clamped in the annular groove.

8. A hidden stylus according to claim 7, wherein: the first shell comprises two parts, and the first shell is formed by buckling the two parts.

9. A hidden stylus according to claim 1, wherein: the fixing rod is made of metal.

10. A hidden stylus according to any one of claims 1-9, wherein: the hidden stylus is an electronic hidden stylus with a voice reminding function.