Novel medical stethoscope
Technical Field
The invention relates to the technical field of medical diagnosis equipment, in particular to a novel medical stethoscope.
Background
The medical equipment refers to instruments, equipment, appliances, materials or other articles which are used for human bodies independently or in combination, and also comprises required software, and compared with the advocated classification methods, the medical equipment has three major categories, namely diagnosis equipment, treatment equipment and auxiliary equipment, wherein the diagnosis equipment can be divided into eight categories: an X-ray diagnostic apparatus, an ultrasonic diagnostic apparatus, a functional examination apparatus, an endoscopy apparatus, a nuclear medicine apparatus, an experimental diagnostic apparatus, and a pathological diagnosis apparatus.
When current medical diagnosis equipment is using, because the auscultation equipment that medical personnel used all hangs on the neck or adorns in the pocket, cause easily that auscultation equipment and external object take place friction or collision, make auscultation equipment impaired, when cold weather is auscultated to patient, auscultation equipment ices patient easily, make patient's health irritated, make patient feel uncomfortable more, lead to auscultation equipment result of use not good, we have proposed a novel medical treatment stethoscope for this reason.
Disclosure of Invention
An object of the present application is to provide a novel medical stethoscope to solve the problems set forth in the above background art.
In order to achieve the above purpose, the present application provides the following technical solutions: a novel medical stethoscope comprises a placing cylinder and a stethoscope head arranged at the bottom of the placing cylinder, wherein a plurality of sliding rods which are uniformly arranged are fixedly arranged at the top of the stethoscope head, a plurality of pairs of mounting plates are fixedly arranged on the inner wall of the top of the placing cylinder, a plurality of pairs of driving rods are correspondingly and rotatably arranged on the side wall of the mounting plates, a plurality of mounting grooves which are uniformly arranged are arranged on the side wall of the placing cylinder, fixed holes are arranged on the inner wall of the mounting grooves, rotating columns are rotatably arranged on the opposite inner walls of the mounting grooves, a protection heating function part is arranged on the rotating columns and the driving rods, the protection heating function part is matched with the sliding rods for installation, a plurality of sliding holes which are uniformly arranged are arranged at the top of the placing cylinder, clamping shells are fixedly arranged on the inner walls of the sliding holes, and a stethoscope wire is fixedly arranged at the top of the stethoscope head, the fixed cover has connect a solid fixed cylinder on the auscultation line, and is a plurality of equal fixed mounting has the connecting rod, and is a plurality of on the lateral wall of sliding rod the equal fixed mounting in one end of connecting rod in on the lateral wall of solid fixed cylinder, the one end fixed mounting of auscultation line has the connector, the equal fixed mounting in both ends of connector has the dead lever, two install supplementary string on the lateral wall of dead lever and wear the unit.
Borrow by above-mentioned structure, through protection heating function portion, make diagnostic equipment when chilly weather uses, can not ice patient, make patient can not feel uncomfortable, diagnostic equipment when not using, can not take place to rub or collide with external object, can be protected, make diagnostic equipment be difficult for taking place to damage, life is longer, makes medical diagnosis equipment result of use better, convenient to use more can be applicable to more medical personnel, uses safelyr, and is more practical.
Preferably, protection heating function portion is including fixed cup jointing respectively in a plurality of straight-teeth gear on the drive pole, fixed cup joint respectively in a plurality of installation pole on the column spinner, respectively fixed mounting in a plurality of a pair of wind spring, a pair of stay cord on the column spinner lateral wall, it is a plurality of equal fixed mounting has the heater on the lateral wall of installation pole, it is a plurality of one side that the heater is close to each other all corresponds fixed mounting and has the elasticity protection casing, and is a plurality of fixed mounting is respectively in a plurality of the one end of stay cord on the lateral wall of drive pole, it is a plurality of straight-teeth gear and a plurality of the installation of slide bar adaptation.
Furthermore, through the protection heating function portion, when the diagnosis equipment is used in cold weather, the patient can not be iced, the patient can not feel uncomfortable, when the diagnosis equipment is not used, the diagnosis equipment can not rub or collide with an external object, the diagnosis equipment can be well protected, the diagnosis equipment is not easy to damage, the service life is longer, and the use effect of the medical diagnosis equipment is better.
Preferably, baffles are fixedly mounted on two opposite side walls of the plurality of mounting grooves, and one ends of the plurality of pairs of coil springs are respectively and fixedly mounted on the tops of the plurality of pairs of baffles.
Furthermore, the coil spring can have larger elastic deformation restoring force through the baffle plate, so that the medical diagnosis equipment is more easily and stably used.
Preferably, a plurality of racks are fixedly mounted on the side walls of the sliding rods, and the plurality of straight gears are meshed with the plurality of racks respectively.
Furthermore, the rack can drive the rack to move when the straight gear rotates, so that the medical diagnostic equipment is more convenient and faster to use, and the medical diagnostic equipment is more practical.
Preferably, it is a plurality of all fixed mounting have two spill fixed plates on the bottom inner wall of fixed orifices, it is many right all rotate on the lateral wall of spill fixed plate and install the pivot, it is many right all fixed cup joints the pulley in the pivot, it is many right all seted up the grooving on the lateral wall of pulley, it is many right stay cord difference adaptation is installed on many pairs on the inner wall of grooving.
Furthermore, the pull rope can be in the rope groove through the pulley, so that the pull rope is more stable and smooth when moving.
Preferably, the auxiliary hanging unit comprises two elastic telescopic belts fixedly installed on the side walls of the fixing rods respectively, one elastic telescopic belt is fixedly installed on the side wall of the elastic telescopic belt and is provided with a pasting thorn, the other elastic telescopic belt is fixedly installed on the side wall of the elastic telescopic belt and is provided with pasting hair, the pasting thorn is installed in a manner of being matched with the pasting hair, and the pasting hair is longer than the pasting thorn.
Further, wear the unit through supplementary hanging, two elastic expansion bands of pulling make two elastic expansion bands wind behind the brain, make paste the thorn and paste on pasting the hair, make personnel be difficult for taking place to drop when using medical diagnostic equipment, make medical diagnostic equipment can not break, paste the hair than pasting the thorn and be long, under elastic force effect in elastic expansion band, personnel can adjust the elasticity degree of elastic expansion band cover overhead, make medical diagnostic equipment can be applicable to more medical personnel, make medical diagnostic equipment application scope wider, life is longer.
Preferably, the plurality of sliding rods are respectively slidably mounted on the plurality of sliding holes and the plurality of inner walls of the clamping shells, a spring groove is formed in a side wall of one of the sliding rods, an elastic clamping plate is fixedly mounted on a side wall of the spring groove, a spring is fixedly mounted on an inner wall of the spring groove, and one end of the spring is fixedly mounted on a side wall of the elastic clamping plate.
Through the setting of spring, make medical personnel relax more during use medical diagnostic equipment laborsaving, make medical diagnostic equipment more stable.
Preferably, a clamping hole is formed in a side wall of one of the clamping shells, and the elastic clamping plate is mounted on the inner wall of the clamping hole in a matched manner.
Furthermore, the elastic clamping plate can be clamped in the clamping hole through the clamping hole, so that the medical diagnosis equipment can be stably placed when not used, is not easy to damage, and has longer service life.
Preferably, the top of the placing cylinder is provided with a wire hole, and the auscultation wire is slidably mounted on the inner wall of the wire hole.
Through the arrangement of the line holes, the auscultation line can slide smoothly in the line holes, so that the auscultation line is not easy to break, and the service life of the medical diagnosis equipment is longer.
Preferably, the bottom of the placing barrel is provided with an edge radius, the side walls of the two fixing rods are fixedly provided with the same elastic piece, and one ends of the two fixing rods are fixedly provided with earplugs.
Through the setting of limit radius, make medical diagnostic equipment edge more smooth, make medical diagnostic equipment can not hurt medical personnel and patient, make medical diagnostic equipment use safelyr.
In conclusion, the technical effects and advantages of the invention are as follows:
1. the stethoscope head has a reasonable structure, before the diagnostic equipment is used, the stethoscope head is positioned in the placing tube, the heater is started to heat the surface of the stethoscope head, so that the surface of the stethoscope head is not cold when the diagnostic equipment is used in cold weather, the stethoscope head is not frozen to a patient during diagnosis, the patient does not feel uncomfortable, the elastic protective cover can effectively wrap and protect the stethoscope head, the diagnostic equipment can be well protected by the placing tube and the elastic protective cover when the diagnostic equipment is not used, the diagnostic equipment cannot rub or collide with an external object, the diagnostic equipment is not easy to damage, the using effect of the medical diagnostic equipment is better, and the medical diagnostic equipment is more convenient to use.
2. When the medical diagnostic equipment is used, the elastic clamping plate is pressed to compress the spring, the elastic clamping plate is pulled out of the clamping hole, the fixed cylinder is pinched and pushed, the sliding rod drives the rack to move, the straight gear drives the driving rod to rotate, the driving rod loosens the wound pull rope, the pull rope rolls on the pulley, the rotating column rotates under the action of the elastic deformation restoring force of the coil spring, the rotating column winds the pull rope, the mounting rod drives the heater and the elastic protective cover to rotate, the elastic protective cover is finally attached to the outer side of the placing cylinder, and the auscultation head extends out of the placing cylinder, so that the medical diagnostic equipment is more convenient to use, the medical diagnostic equipment is more convenient to carry, and the using effect is better.
3. According to the invention, the fixed cylinder is pulled reversely, the connecting rod drives the sliding rod to move reversely, the straight gear drives the driving rod to rotate reversely, the driving rod pulls and winds the pull rope, the pull rope is loosened from the rotary column, the rotary column rotates reversely, the mounting rod drives the heater and the elastic protective cover to rotate reversely, the auscultation head is contracted in the placing cylinder, the elastic protective cover can seal the auscultation head in the placing cylinder, when the medical diagnostic equipment is not used, the auscultation head cannot rub or touch with an external object, the auscultation head is not easy to damage, the medical diagnostic equipment is more convenient to store and place, and the medical diagnostic equipment is more practical.
4. When the medical diagnosis equipment is used, the two earplugs are placed into the two ears, the two elastic telescopic belts are pulled, the two elastic telescopic belts are wound around the brain, the sticking spines are stuck on the sticking bristles, so that personnel are not easy to fall off when using the medical diagnosis equipment, the medical diagnosis equipment cannot break down, the sticking bristles are longer than the sticking spines, the personnel can adjust the tightness degree of the elastic telescopic belts sleeved on the head under the action of the elastic force of the elastic telescopic belts, the medical diagnosis equipment can be suitable for more medical personnel, the application range of the medical diagnosis equipment is wider, and the service life of the medical diagnosis equipment is longer.
5. According to the medical diagnostic equipment, the fixing cylinder is sleeved on the auscultation line, so that when a person uses the medical diagnostic equipment, the auscultation line is not easy to break, the medical diagnostic equipment is not easy to damage, the edge of the medical diagnostic equipment is smoother due to the rounding, the medical diagnostic equipment cannot hurt medical care personnel and patients, the medical diagnostic equipment is safer to use, and when the medical diagnostic equipment is used, the heater is arranged outside the placing cylinder, so that the placing cylinder cannot be iced to the patients, the patients cannot feel uncomfortable, the using effect of the medical diagnostic equipment is better, and the medical diagnostic equipment is more practical.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of a first perspective of a novel medical diagnostic apparatus with good use effect;
FIG. 2 is a schematic view of a second perspective structure of the novel medical diagnostic apparatus with good use effect;
FIG. 3 is a schematic view of a partially cut-away structure of the novel medical diagnostic apparatus with good use effect;
FIG. 4 is a schematic view of a partially enlarged perspective structure of a novel medical diagnostic apparatus with good use effect;
FIG. 5 is a schematic view of the auxiliary hanging unit;
FIG. 6 is an enlarged perspective view of the first portion of the heating protection function part
FIG. 7 is an enlarged perspective view of a second portion of the heating protection function portion;
fig. 8 is an enlarged perspective view of the third portion of the protective heating function portion.
In the figure: 1. placing the cylinder; 2. an auscultation head; 3. an auscultation line; 4. a connector; 5. an elastic sheet; 6. fixing the rod; 7. an earplug; 8. an elastic stretchable band; 9. a fixed cylinder; 10. an elastic protective cover; 11. a heater; 12. a connecting rod; 13. clamping a shell; 14. mounting a rod; 15. a slide bar; 16. sticking the thorn; 17. pasting wool; 18. pulling a rope; 19. a pulley; 20. a concave fixing plate; 21. a coil spring; 22. a baffle plate; 23. a spur gear; 24. driving the rod; 25. mounting a plate; 26. a rack; 27. an elastic clamping plate; 28. a spring; 29. a spin column; 30. rounding the edges; 31. a rotating shaft.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b): referring to fig. 1-8, a novel medical stethoscope includes a placing tube 1, a stethoscope head 2 disposed at the bottom of the placing tube 1, a plurality of sliding rods 15 disposed uniformly and fixedly mounted on the top of the stethoscope head 2, and the sliding rods 15 may be any rod-shaped object in the prior art, such as a metal rod, which is welded and fixed to the top of the stethoscope head 2.
A plurality of pairs of mounting plates 25 are fixedly mounted on the inner wall of the top of the placing cylinder 1, and the mounting plates 25 can be any metal plate in the prior art and are welded and fixed with the inner wall of the top of the placing cylinder 1.
All correspond to rotate on the lateral wall of a plurality of mounting panels 25 and install drive rod 24, place and set up the mounting groove of a plurality of even settings on the lateral wall of a section of thick bamboo 1, the fixed orifices has all been seted up on the inner wall of a plurality of mounting grooves, all rotate on the relative inner wall of a plurality of mounting grooves and install column spinner 29, install protection heating function portion on a plurality of column spinner 29 and a plurality of drive rod 24, protection heating function portion and the installation of 15 adaptations of a plurality of slide bars, place the slide holes that a plurality of even settings are seted up at the top of a section of thick bamboo 1, equal fixed mounting has card shell 13 on the inner wall of a plurality of slide holes, card shell 13 can be any one metal sheet among the prior art, it fixes with the inner wall welding of slide holes.
The top fixed mounting of auscultation head 2 has auscultation line 3, and the fixed cup has connect solid fixed cylinder 9 on the auscultation line 3, and equal fixed mounting has connecting rod 12 on the lateral wall of a plurality of slide bars 15, and connecting rod 12 can be any one kind of metal pole among the prior art, and it is fixed with the lateral wall welding of slide bar 15.
The equal fixed mounting in the lateral wall of a fixed cylinder 9 of one end of a plurality of connecting rods 12, the one end fixed mounting of auscultation line 3 has connector 4, the equal fixed mounting in both ends of connector 4 has dead lever 6, installs the supplementary unit of wearing of hanging on the lateral wall of two dead levers 6. Through the setting of protection heating function portion, make diagnostic equipment when chilly weather uses, can not ice patient, make patient can not feel uncomfortable, diagnostic equipment when not using, can not take place to rub or collide with external object, can be protected, make diagnostic equipment be difficult for taking place to damage, life is longer, it is better to make medical diagnosis equipment result of use, and convenient to use more can be applicable to more medical personnel, uses safelyr, and is more practical.
As a preferred embodiment of this embodiment, the protection heating function portion includes a spur gear 23 fixedly sleeved on the plurality of driving rods 24, a mounting rod 14 fixedly sleeved on the plurality of rotary columns 29, a pair of coil springs 21 fixedly mounted on the side walls of the plurality of rotary columns 29, and a pair of pulling ropes 18, wherein the heaters 11 are fixedly mounted on the side walls of the plurality of mounting rods 14, the elastic protection covers 10 are fixedly mounted on the side walls of the plurality of heaters 11 close to each other, one ends of the plurality of pairs of pulling ropes 18 are fixedly mounted on the side walls of the plurality of driving rods 24, and the plurality of spur gears 23 are mounted in a fitting manner with the plurality of sliding rods 15. Through the setting of protection heating function portion, make diagnostic equipment when chilly weather uses, can not ice patient, make patient not feel uncomfortable, diagnostic equipment when not using, can not take place to rub or collide with external object, can be protected, make diagnostic equipment be difficult for taking place to damage, life is longer, makes medical diagnosis equipment result of use better.
In this embodiment, the two opposite side walls of the plurality of mounting grooves are fixedly mounted with the baffles 22, and one ends of the plurality of pairs of coil springs 21 are respectively fixedly mounted on the tops of the plurality of pairs of baffles 22. By the arrangement of the baffle 22, the coil spring 21 can have larger elastic deformation restoring force, so that the medical diagnostic equipment is more easily and stably used.
In the present embodiment, a rack 26 is fixedly mounted on each of the side walls of the plurality of slide bars 15, and the plurality of spur gears 23 are engaged with the plurality of racks 26, respectively. Through the arrangement of the rack 26, when the straight gear 23 rotates, the rack 26 can be driven to move, so that the medical diagnosis equipment is more convenient and faster to use, and the medical diagnosis equipment is more practical.
In this embodiment, equal fixed mounting has two spill fixed plates 20 on the bottom inner wall of a plurality of fixed orificess, all rotates on the lateral wall of a plurality of pairs of spill fixed plates 20 and installs pivot 31, all fixedly cup joints pulley 19 on a plurality of pairs of pivot 31, has all seted up the grooving on a plurality of pairs of pulley 19's the lateral wall, and a plurality of stay cords 18 difference adaptation are installed on the inner wall of a plurality of pairs of grooving. The arrangement of the pulley 19 enables the pull rope 18 to be in the rope groove, so that the movement of the pull rope 18 is more stable and smooth.
As a preferred embodiment of this embodiment, the auxiliary hanging and wearing unit includes elastic stretchable belts 8 respectively fixedly mounted on the side walls of the two fixing rods 6, wherein a pasting thorn 16 is fixedly mounted on the side wall of one of the elastic stretchable belts 8, a pasting hair 17 is fixedly mounted on the side wall of the other one of the elastic stretchable belts 8, the pasting thorn 16 is mounted in a manner of being matched with the pasting hair 17, and the pasting hair 17 is longer than the pasting thorn 16. Wear the setting of unit through supplementary hanging, stimulate two elastic expansion band 8, make two elastic expansion band 8 around behind the brain, make paste thorn 16 paste on pasting hair 17, make personnel be difficult for taking place to drop when using medical diagnostic equipment, make medical diagnostic equipment can not break, paste hair 17 than pasting thorn 16 and be long, under elastic force effect of elastic expansion band 8, personnel can adjust the elasticity degree of elastic expansion band 8 cover overhead, make medical diagnostic equipment can be applicable to more medical personnel, make medical diagnostic equipment application scope wider, service life is longer.
As a preferred embodiment of this embodiment, the plurality of sliding rods 15 are slidably mounted on the plurality of sliding holes and the inner walls of the plurality of clamping shells 13, respectively, a spring slot is opened on a side wall of one sliding rod 15, an elastic clamping plate 27 is fixedly mounted on a side wall of the spring slot, a spring 28 is fixedly mounted on an inner wall of the spring slot, and one end of the spring 28 is fixedly mounted on a side wall of the elastic clamping plate 27. Through the setting of spring 28, make medical personnel more light laborsaving when using medical diagnostic equipment, make medical diagnostic equipment more stable.
In this embodiment, a clamping hole is formed on a side wall of one of the clamping shells 13, and the elastic clamping plate 27 is adapted to be mounted on an inner wall of the clamping hole. Through the setting in card hole, make elasticity cardboard 27 can block in the card downthehole, make medical diagnostic equipment when not using, can stable place, difficult impaired, make medical diagnostic equipment life longer.
As a preferred embodiment of the present embodiment, a wire hole is opened on the top of the placing tube 1, and the auscultation wire 3 is slidably mounted on the inner wall of the wire hole. Through the arrangement of the line holes, the auscultation line 3 can slide smoothly in the line holes, so that the auscultation line 3 is not easy to break, and the service life of the medical diagnosis equipment is longer.
As a preferred embodiment of the present embodiment, the bottom of the placing cylinder 1 is provided with an edge radius 30, the same elastic piece 5 is fixedly mounted on the side walls of the two fixing rods 6, and one end of each of the two fixing rods 6 is fixedly mounted with an earplug 7. Through the setting of limit radius 30, make medical diagnostic equipment edge more smooth, make medical diagnostic equipment can not harm medical personnel and patient, make medical diagnostic equipment use safelyr.
This practical theory of operation: before using diagnostic equipment to patient, auscultation head 2 is in and places a 1 inside, make heater 11 begin to heat, and then make heater 11 heat 2 surfaces of auscultation head, make 2 surfaces of auscultation head can not ice cold, make 2 of auscultation head can not ice patient, make diagnostic equipment can not make patient feel uncomfortable when using, and elasticity protection casing 10 can effectually protect 2 parcels of auscultation head, make diagnostic equipment when not using, can place a 1 and elasticity protection casing 10 and protect well, make diagnostic equipment difficult emergence damage, make medical diagnostic equipment result of use better, and convenient to use more.
When the diagnostic device is used, the elastic clamping plate 27 is pressed to compress the spring 28, so that the elastic clamping plate 27 is drawn out of the clamping hole, the fixed cylinder 9 is pinched and pushed, the auscultation wire 3 slides in the wire hole, the sliding rod 15 slides on the sliding hole and the inner wall of the clamping shell 13, the rack 26 is driven to move, the spur gear 23 is driven to rotate, the driving rod 24 is driven to rotate simultaneously, the driving rod 24 releases the wound pull rope 18, the pull rope 18 rolls on the pulley 19, the coil spring 21 is driven to rotate the rotary column 29 under the action of elastic deformation restoring force, the rotary column 29 winds the pull rope 18, the mounting rod 14 is driven to rotate, the heater 11 drives the elastic protective cover 10 to rotate, the elastic protective cover 10 is finally attached to the outer side of the placing cylinder 1, the auscultation head 2 extends out of the placing cylinder 1, and the medical diagnostic device can be used, so that the medical diagnostic device is more convenient to use, the medical diagnosis equipment is more convenient to carry and has better use effect.
When accomodating diagnostic equipment, reverse pulling solid fixed cylinder 9 can, can make connecting rod 12 drive slide bar 15 reverse migration, make spur gear 23 drive driving rod 24 antiport, make driving rod 24 drag the winding to stay cord 18, make stay cord 18 loosen from the column spinner 29, make column spinner 29 antiport, make installation pole 14 drive heater 11 and elastic protection casing 10 antiport, and then make auscultation head 2 be in and place a section of thick bamboo 1 inside, and make elastic protection casing 10 can seal auscultation head 2 in placing a section of thick bamboo 1, make medical diagnostic equipment when not using, auscultation head 2 can not take place the friction or touch with external object, make auscultation head 2 difficult emergence damage, make medical diagnostic equipment be convenient for more accomodate and place, make medical diagnostic equipment more practical.
When personnel use medical diagnostic equipment, put into two ears to two earplugs 7, stimulate two elastic telescopic bands 8, make two elastic telescopic bands 8 around behind the brain, make paste thorn 16 paste on pasting hair 17, make personnel be difficult for taking place to drop when using medical diagnostic equipment, make medical diagnostic equipment can not break, and paste hair 17 than pasting thorn 16 length, under the elastic force effect of elastic telescopic band 8, make personnel can adjust the elasticity degree that elastic telescopic band 8 overlaps overhead, make medical diagnostic equipment can be applicable to more medical personnel, make medical diagnostic equipment application scope wider, life is longer.
The fixed cover of a fixed section of thick bamboo 9 is on auscultation line 3, when making personnel use medical diagnostic equipment, be difficult for breaking auscultation line 3, it is not fragile to make medical diagnostic equipment, and through the setting of limit radius 30, it is more smooth to make medical diagnostic equipment edge, make medical diagnostic equipment can not injure medical personnel and patient, it is safer to make medical diagnostic equipment use, and when using medical diagnostic equipment, heater 11 is located and places a section of thick bamboo 1 outside, make and place a section of thick bamboo 1 and can not ice patient yet, make patient can not produce uncomfortable and feel, make medical diagnostic equipment result of use better, and is more practical.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.