A kind of Medical otoscope
Technical field
The present invention relates to a kind of Medical otoscope of the disease for Checking and diagnosis ear, particularly the eyesight adjustment device of auriscope
Background technology
Medical otoscope is to utilize the magnifier that arranges on the auriscope that the image of ear is amplified so that the doctor checks, in the diopter that checks that Shi doctor need to regulate magnifier.Auriscope of the prior art mainly is the eyesight adjustment device that adopts spiral marking connection, by swivel nut doctor's diopter is regulated.Such as Fig. 1, existing auriscope comprises magnifier A, observation base B, nut C, support bar D, peep ear device E and lighting source F, spiral marking connection between observation base B and the support bar D, nut C is arranged on the outside at the spiral marking connection place of support bar D, observe ear's image of peeping ear device E osculum end by magnifier A with Shi doctor, the diopter adjustment method of auriscope is: at first nut C is unscrewed, by rotating forward or backwards one or more 360 ° of observation base B, make between support bar D and the observation base B near or away from one or more pitch, until clear ear's image accent of observing, nut C is screwed after the image accent is clear, auriscope has namely mixed up and can use again.The diopter that adopts this mode to regulate auriscope not only operates very inconvenient, and can't realize the continuous stepless adjusting of magnifier diopter
Summary of the invention
Technical problem to be solved by this invention is to overcome the deficiencies in the prior art, provides a kind of diopter adjustment more accurate and Medical otoscope easily.
For solving above technical problem, the present invention takes following technical scheme:
A kind of Medical otoscope, comprise pedestal, be arranged on magnifier and the lighting source on pedestal top, one end is arranged on the support bar on the pedestal, the observation base that the bottom is connected with support bar and be arranged on and peep the ear device on the observation base, wherein, the bottom of observation base has the first connecting hole that an axial line overlaps with the axial line of support bar, the other end of support bar can be plugged in the first connecting hole slidably, and this auriscope also comprises the threaded fastener for fixing described observation base and support bar.
Preferably, described threaded fastener is that an end is provided with screw thread, the other end is provided with the nut of the first protuberance that protrudes its inner surface, the threaded end of the tool of described nut is threaded mutually with the outer wall of the first connecting hole, described support bar has the second protuberance that protrudes its outer surface, and support bar is arranged with spacing collar outward, and described the first protuberance is stuck between described spacing collar and the second protuberance.
Preferably, described Medical otoscope also comprises being arranged between observation base and the support bar and is used for so that described support bar has the elastic component that advances or outwards deviate from movement tendency in the first connecting hole to lira.The effect of this elastic component is the thread pitch of eliminating the screw thread contact portion of observation base and threaded fastener, make between the screw thread and closely offset, can only rotate, and can not occur axial loosening, and then more stable, accurate when making by the screw thread rotation regulating diopter.
Preferably, the end that links to each other with described observation base of described support bar offers the second connecting hole, this second connecting hole communicates with the first connecting hole, and an end of described elastic component is against or is connected on the bottom surface of the first connecting hole, and the other end is against or is connected on the bottom surface of the second connecting hole.
Preferably, described elastic component is stage clip or extension spring.
Preferably, the axially extended groove along support bar has been offered in the outside of described support bar, the tenon or the pin that are provided with corresponding cooperation with this groove in the first connecting hole and can move forward and backward along the length direction of this groove.This groove mainly is to play guide effect, and support bar can only be moved along the length direction of groove in the first connecting hole, and displacement or rotation can not occur.For same purpose, also can offer the axially extended groove along the first connecting hole in the first connecting hole, and at the outer setting of support bar and the corresponding cooperation of this groove and tenon or the pin that can move forward and backward along the length direction of this groove.
Because the enforcement of above technical scheme, the present invention compared with prior art has following advantage:
The present invention is because support bar is can be plugged in slidably in the first connecting hole of observation base bottom, make it possible to realize the continuous stepless adjusting of auriscope diopter, with can only come the structure of regulating diopter to compare by adjusting one or several pitch between observation base in the prior art and the support bar, diopter adjustment is more accurate; Simultaneously, the present invention does not need to rotate observation base when regulating diopter, the threaded fastener that only need be rotatably provided between observation base and the support bar just can be realized moving forward and backward of support bar, and after the diopter adjustment is finished, do not need to append again locking, therefore so that the operation of diopter adjustment is more convenient and quick yet.
Description of drawings
The present invention will be further described in detail below in conjunction with accompanying drawing and concrete embodiment:
Fig. 1 is the structural representation (part is analysed and observe) of the auriscope of prior art;
Fig. 2 is the structural representation (part is analysed and observe) of auriscope of the present invention;
Fig. 3 is the coupling part structural representation of observation base and support bar among the embodiment 1;
Fig. 4 is the cross-sectional schematic of A-A face among Fig. 3;
Fig. 5 is the coupling part structural representation of observation base and support bar among the embodiment 2;
Fig. 6 is the coupling part structural representation of observation base and support bar among the embodiment 3;
Wherein: 1, pedestal; 2, magnifier; 3, lighting source; 4, observation base; 40, the first connecting hole; 5, peep the ear device; 6, support bar; 60, the second connecting hole; 61, the second protuberance; 7, threaded fastener; 70, the first protuberance; 8, elastic component; 80, steady pin; 9, spacing collar.
The specific embodiment
The present invention will be further described in detail below in conjunction with specific embodiment, but be not limited to these embodiment.
" front " described in this description refers to " left side " side among Fig. 2, and described " afterwards " refers to " right side " side among Fig. 2.
Embodiment 1
With reference to Fig. 2,3 and 4, auriscope according to present embodiment, comprise pedestal 1, be arranged on magnifier 2, lighting source 3, the support bar 6 on pedestal 1 top, the observation base 4 that the bottom is connected with support bar 6, and be arranged on and peep ear device 5 on the observation base 4, wherein, the optical axis of magnifier 2 coincides with the central shaft of peeping ear device 5, and the observer can observe ear's image of peeping in the ear device 5 by magnifier 2, is parallel to each other between the optical axis of support bar 6, lighting source 3 and magnifier 2.
According to present embodiment, the bottom of observation base 4 inwardly offers the first axial connecting hole 40, one end of support bar 6 is arranged on the pedestal 1, and the other end can be plugged in the first connecting hole 40 slidably, and the axial line of support bar 6 overlaps with the axial line of the first connecting hole 40.Also offering axial the second connecting hole 60, the second connecting holes 60 being plugged in of support bar 6 on the end in the first connecting hole 40 communicates with the first connecting hole 40.This auriscope also comprises for the threaded fastener 7 of Orientation observation seat 4 with support bar 6, threaded fastener 7 is that an end is provided with the nut that screw thread, the other end are provided with the first protuberance 70 that protrudes its inner surface in this example, the threaded end of the tool of this nut is threaded mutually with the outer wall of the first connecting hole 40, support bar 6 has the second protuberance 61 that protrudes its outer surface, and be arranged with spacing collar 9 outside the support bar 6, the first protuberance 70 of nut namely is stuck between spacing collar 9 and the second protuberance 61.And the first protuberance 70 and the second protuberance 61 and spacing collar 9 front and back offset, so that this nut can only rotate with respect to support bar 6, and can't occur axially to move.
In addition, between observation base 4 and support bar 6, also be provided with an elastic component 8 in the present embodiment, it is stage clip, one end of this stage clip is against on the bottom surface of the first connecting hole 40, the other end is against on the bottom surface of the second connecting hole 60, and so that support bar 6 has the movement tendency outwards deviate from from the first connecting hole 40 with respect to observation base 4.The effect of this stage clip is that to eliminate observation base 4 be nut with threaded fastener 7() the thread pitch of screw thread contact portion, make between screw thread and the screw thread and closely offset, can only rotate between nut and the observation base 4, and can not occur axial loosening, and then more stable and accurate when making by the screw thread rotation regulating diopter.
In the present embodiment, the axially extended groove W1 along support bar 6 has also been offered in the outside of support bar 6, and groove W1 terminates in the place ahead of spacing collar 9, is provided with in the first connecting hole 40 and the corresponding cooperation of groove W1 and the tenon M1 that can move forward and backward along the length direction of groove W1.Groove W1 and with it the setting of the tenon M1 of corresponding matching can play guide effect, make the observer when carrying out diopter adjustment by nut rotation, between support bar 6 and the observation base 4 axial moving forward and backward can only occur, can not produce rotation or non axial departing from, and then the optical axis that makes magnifier 2 is stable with the concentricity of the central shaft of peeping ear device 5, not susceptible to.
The operation principle of the auriscope of present embodiment is: lighting source 3 illuminates ear's image of peeping ear device 5 small bore end, this image is positioned near the focal plane of magnifier 2, the observer is by magnifier 2 pictures with the aid of pictures, different observers' diopter is different, therefore the distance that needs to regulate magnifier 2 and peep between the ear device 5 obtains clearly image, and this distance can or revolve by precession that to move back threaded fastener 7(be nut) regulate.When swivel nut, axial moving forward and backward occurs with respect to support bar 6 in observation base 4, thereby the ear device 5 of peeping on the observation base 4 is changed with respect to the distance of magnifier 2, thereby can realize the diopter adjustment to magnifier 2.In the present embodiment, axial moving forward and backward can occur with respect to support bar 6 in observation base 4, elastic component 8(is stage clip) can eliminate the thread pitch between observation base 4 and the nut, make axial becoming flexible can not occur between support bar 6 and the observation base 4, and the groove W1 on the support bar 6 cooperates with tenon M1 on the observation base 4 and plays guide effect, makes support bar 6 can not produce rotation or non axial departing from respect to observation base 4; This is so that the auriscope of present embodiment not only can be realized the continuous stepless adjusting of diopter, also make the observer can obtain more reliable, clear and ear's image accurately, and diopter need not append locking after being transferred to the position, makes the use of auriscope more quick and convenient.
Embodiment 2
As shown in Figure 4, the difference of the auriscope of the auriscope of present embodiment and embodiment 1 is: offered in the first connecting hole 40 that they are oppositely arranged at the circumference of the first connecting hole 40 along axially extended two groove W2(of the first connecting hole 40,180 ° of distances), the outer setting of support bar 6 with the corresponding cooperation of groove W2 and can move forward and backward along the length direction of groove W2 two pin M2, groove W2 and with it the pin M2 of corresponding matching equally also play the guiding role, make the observer when carrying out diopter adjustment by nut rotation, between support bar 6 and the observation base 4 axial moving forward and backward can only occur, can not produce rotation or non axial departing from.The other parts of auriscope are identical with embodiment 1 in this example.
Embodiment 3
As shown in Figure 5, the difference of the auriscope of the auriscope of present embodiment and embodiment 1 is: elastic component 8 is extension spring, the two ends of this extension spring are fixing by two steady pins 80 that are separately positioned on the first connecting hole 40 and the second connecting hole 60 bottom surfaces, observation base 4 is strained mutually with support bar 6, its effect is to eliminate thread pitch equally, makes to become flexible before and after can not occuring when carrying out diopter adjustment by the nut rotation between support bar 6 and the observation base 4.The other parts of auriscope are identical with embodiment 1 in this example.
More than the present invention has been done detailed description; its purpose is to allow the personage that is familiar with this art can understand content of the present invention and is implemented; can not limit protection scope of the present invention with this; the equivalence that all spirit according to the present invention are done changes or modifies, and all should be encompassed in protection scope of the present invention