VAGINAL SPECULUM

Abstract

A vaginal speculum has an upper member having a first handle, a lower member having a second handle, a threaded rod, and a nut. A positioning cavity is formed in the second handle and has an insertion cavity and multiple engaging grooves. The threaded rod has a head, a rod, and multiple engaging protrusions. The head is mounted in the insertion cavity. The engaging protrusions are arranged around the head and respectively engaged with the engaging grooves. The rod extends from the head toward the first handle. The nut is connected with the rod of the threaded rod via a threaded connection. Accordingly, the head of the threaded rod is firmly fixed in the positioning cavity.

Description

Claims

1. A vaginal speculum comprising: an upper member having a first handle extending downwardly from the upper member;a lower member pivotally connected with the upper member and having a second handle extending downwardly from the lower member, located at a side of the first handle and having a first side surface away from the first handle and a second side surface near the first handle; anda positioning cavity formed in the second handle and having an insertion cavity recessed in the first side surface of the second handle and having an end surface away from the first side surface of the second handle spaced from the second side surface of the second handle and at least one cavity limiting surface defined in an annular surface of the insertion cavity; andmultiple engaging grooves arranged around the insertion cavity and spaced from each other, and each of the engaging grooves havinga side opening formed in the annular surface of the insertion cavity and communicating with the insertion cavity,an end surface near the first side surface of the second handle spaced from the first side surface of the second handle,an end opening formed in the second side surface of the second handle, anda spaced segment formed in said each engaging groove from the second side surface of the second handle to the end surface of the insertion cavity; anda rod hole formed through the second side surface of the second handle and the end surface of the insertion cavity, communicating with the insertion cavity, and spaced apart from the spaced segments of the engaging grooves from the second side surface of the second handle to the end surface of the insertion cavity;a threaded rod having a head mounted in the insertion cavity of the positioning cavity and having at least one head limiting surface defined in an annular surface of the head and corresponding to the at least one cavity limiting surface in position and shape;multiple engaging protrusions protruding from the annular surface of the head, spaced from each other, and respectively engaged with the engaging grooves of the positioning cavity; anda rod extending from the head toward the first handle and extending through the rod hole in the second handle and the first handle; anda nut connected with the rod of the threaded rod via a threaded connection and selectively abutting against the first handle.

2. (canceled)

3. The vaginal speculum as claimed in claim 1, wherein each of the engaging protrusions has a guiding surface defined in one of two ends of each of the engaging protrusions near the rod.

4. The vaginal speculum as claimed in claim 3, wherein the other one of the two ends of said each of the engaging protrusions away from the rod is aligned with one of two ends of the head away from the rod, and a distance is formed between the other one of the two ends of said each of the engaging protrusions near the rod and the other one of the two ends of the head near the rod.

5. The vaginal speculum as claimed in claim 1, wherein the insertion cavity has two of the at least one cavity limiting surface and two cavity arced surfaces defined in the annular surface of the insertion cavity, the two cavity limiting surfaces are spaced from each other, and the two cavity arced surfaces are connected with the two cavity limiting surfaces and are arranged opposite to each other;the positioning cavity has two of the multiple engaging grooves being adjacent to the two cavity arced surfaces respectively and communicating with the insertion cavity;the head of the threaded rod has two of the at least one head limiting surface and two head arced surfaces, the two head limiting surfaces are respectively aligned with the two cavity limiting surfaces, and the two head arced surfaces are connected with the two head limiting surfaces, are arranged opposite to each other, and are respectively aligned with the two cavity arced surfaces; andthe threaded rod has two of the multiple engaging protrusions respectively protruding from the two head arced surfaces and respectively engaged with the two engaging grooves.

6. (canceled)

7. The vaginal speculum as claimed in claim 3, wherein the insertion cavity has two of the at least one cavity limiting surfaces and two cavity arced surface defined in the annular surface of the insertion cavity, the two cavity limiting surfaces are spaced from each other, and the two cavity arced surfaces are connected with the two cavity limiting surfaces and are arranged opposite to each other;the positioning cavity has two of the multiple engaging grooves being adjacent to the two cavity arced surfaces respectively and communicating with the insertion cavity;the head of the threaded rod has two of the at least one head limiting surface and two head arced surfaces, the two head limiting surfaces are respectively aligned with the two cavity limiting surfaces, and the two head arced surfaces are connected with the two head limiting surfaces, are arranged opposite to each other, and are respectively aligned with the two cavity arced surfaces; andthe threaded rod has two of the multiple engaging protrusions respectively protruding from the two head arced surfaces and respectively engaged with the two engaging grooves.

8. The vaginal speculum as claimed in claim 4, wherein the insertion cavity has two of the at least one cavity limiting surface and two cavity arced surfaces defined in the annular surface of the insertion cavity, the two cavity limiting surfaces are spaced from each other, and the two cavity arced surfaces are connected with the two cavity limiting surfaces and are arranged opposite to each other;the positioning cavity has two of the multiple engaging grooves being adjacent to the two cavity arced surfaces respectively and communicating with the insertion cavity;the head of the threaded rod has two of the at least one head limiting surface and two head arced surfaces, the two head limiting surfaces are respectively aligned with the two cavity limiting surfaces, and the two head arced surfaces are connected with the two head limiting surfaces, are arranged opposite to each other, and are respectively aligned with the two cavity arced surfaces; andthe threaded rod has two of the multiple engaging protrusions respectively protruding from the two head arced surfaces and respectively engaged with the two engaging grooves.

9. The vaginal speculum as claimed in claim 5, wherein a diameter of a circumscribed circle of the rod hole is smaller than a diameter of a circumscribed circle of the insertion cavity;a through hole is formed through the first handle; andthe rod of the threaded rod extends through the through hole in the first handle and extends out from the first handle.

10. (canceled)

11. The vaginal speculum as claimed in claim 7, wherein a diameter of a circumscribed circle of the rod hole is smaller than a diameter of a circumscribed circle of the insertion cavity;a through hole is formed through the first handle; andthe rod of the threaded rod extends through the through hole in the first handle and extends out from the first handle.

12. The vaginal speculum as claimed in claim 8, wherein a diameter of a circumscribed circle of the rod hole is smaller than a diameter of a circumscribed circle of the insertion cavity;a through hole is formed through the first handle; andthe rod of the threaded rod extends through the through hole in the first handle and extends out from the first handle.